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Life%Cycle*Assessment*and*Carbon*Sequestration
J\Zfe[\[`k`fe
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f]@e[ljki`Xc9XdYffGif[lZkj
P.*van*der*Lugt,*PhD*********J.G.*Vogtländer,*PhD
Technical*Report*No.*35
International Network for Bamboo and Rattan
INBAR, the International Network for Bamboo and Rattan, is an intergovernmental
organization bringing together some 41 countries for the promotion of the ecosystem
benefits and values of bamboo and rattan.
Copyright and Fair Use
This publication is licensed for use under the Creative Commons
Attribution–Non-commercial–Share Alike 3.0 Unported Licence. To view this licence, visit
http://creativecommons.org/licenses/by-nc-sa/3.0/ Unless otherwise noted, you are free
to copy, duplicate, or reproduce and distribute, display, or transmit any part of this
publication or portions thereof without permission and to make translations, adaptations,
or other derivative works under the following conditions:
Attribution: The work must be attributed, but not in any way that suggests
endorsement by the publisher or the author(s).
Non-commercial: This work may not be used for commercial purposes.
Share Alike: If this work is altered, transformed, or built upon, the resulting work must be
distributed only under the same or similar license to this one.
Keywords: bamboo, life cycle assessment, product, carbon sequestration, climate change, INBAR
All photos are copyright MOSO International and/or INBAR
Cover: Tel-Aviv University, photograph by Elad Gonen
International Network for Bamboo and Rattan (INBAR) is the multilateral
development organisation of 41 Member States for the promotion of bamboo
and rattan. INBAR supports its members to include bamboo and rattan in their
sustainable development action plans and green economy strategies. It
promotes innovative ways of using bamboo and rattan to improve rural
livelihoods, protect the environment, address climate change and issues of
international bamboo and rattan trade and standards. INBAR connects a global
network of partners from government, private and NGO sectors to promote a
global agenda for sustainable development using bamboo and rattan.
For more information, please visit www.inbar.int.
Address: No. 8 Fu Tong Dong Da Jie, Wang Jing, Chaoyang District, Beijing 100102, P.R.
China. Tel: +86-10-64706161; Fax: +86-10-64702166;
E-mail: info@inbar.int
This study was conducted in conjunction with the Design for Sustainability (DfS)
Program of the Faculty of Industrial Design Engineering of Delft University of
Technology. DfS focuses on research in the eld of sustainable development. The
mass consumption of goods and services should involve the continuous
improvement of environmental, economic and social-cultural values. The central
objective of the DfS research programme is the exploration, description,
understanding and prediction of problems and opportunities for innovating and
designing products and product service systems of superior quality.
For more information please visit www.io.tudelft.nl
Address: Delft University of Technology, Faculty of Industrial Design Engineering,
Design for Sustainability Program Landbergstraat 15, 2628 CE Delft,
the Netherlands Tel +31 (0)152782738; Fax +31 (0)152782956;
email: dfs-io@tudelft.nl
MOSO International was founded in the Netherlands in 1997 and since that time
has established itself as the European market leader in the development of
innovative and sustainable bamboo products in four product groups: ooring,
outdoor (cladding and decking), panels, veneer and beams and unlimited
solutions (customized solutions for industrial clients). Besides product excellence
and innovation, sustainability is one of the key drivers of our business. We
continuously strive to improve the already excellent environmental performance
of MOSO’s bamboo products and the company tries to communicate this in a
transparent manner following internationally accepted methodologies. This
INBAR Technical Report certainly contributes to that goal.
For more information about MOSO International please visit www.moso.eu.
Address: Adam Smithweg 2, 1689 ZW Zwaag, the Netherlands
Tel +31(0)229265732; email info@moso.eu
The publication of this report was supported by MOSO International BV
www.moso.eu
International Network for Bamboo and Rattan (INBAR)
PO Box 100102-86, Beijing 100102, P. R. China
Tel: +86-10-6470 6161; Fax: +86-10-6470 2166;
Email: info@inbar.int
www.inbar.int
ISBN: 978-92-95098-89-3 (printed)
978-92-95098-90-9 (online)
© 2015 INBAR - International Network for Bamboo and Rattan
Printed on recycled paper
International Network for Bamboo and Rattan
INBAR, the International Network for Bamboo and Rattan, is an intergovernmental
organization bringing together some 41 countries for the promotion of the ecosystem
benefits and values of bamboo and rattan.
Copyright and Fair Use
This publication is licensed for use under the Creative Commons
Attribution–Non-commercial–Share Alike 3.0 Unported Licence. To view this licence, visit
http://creativecommons.org/licenses/by-nc-sa/3.0/ Unless otherwise noted, you are free
to copy, duplicate, or reproduce and distribute, display, or transmit any part of this
publication or portions thereof without permission and to make translations, adaptations,
or other derivative works under the following conditions:
Attribution: The work must be attributed, but not in any way that suggests
endorsement by the publisher or the author(s).
Non-commercial: This work may not be used for commercial purposes.
Share Alike: If this work is altered, transformed, or built upon, the resulting work must be
distributed only under the same or similar license to this one.
Keywords: bamboo, life cycle assessment, product, carbon sequestration, climate change, INBAR
All photos are copyright MOSO International and/or INBAR
Cover: Tel-Aviv University, photograph by Elad Gonen
International Network for Bamboo and Rattan (INBAR) is the multilateral
development organisation of 41 Member States for the promotion of bamboo
and rattan. INBAR supports its members to include bamboo and rattan in their
sustainable development action plans and green economy strategies. It
promotes innovative ways of using bamboo and rattan to improve rural
livelihoods, protect the environment, address climate change and issues of
international bamboo and rattan trade and standards. INBAR connects a global
network of partners from government, private and NGO sectors to promote a
global agenda for sustainable development using bamboo and rattan.
For more information, please visit www.inbar.int.
Address: No. 8 Fu Tong Dong Da Jie, Wang Jing, Chaoyang District, Beijing 100102, P.R.
China. Tel: +86-10-64706161; Fax: +86-10-64702166;
E-mail: info@inbar.int
This study was conducted in conjunction with the Design for Sustainability (DfS)
Program of the Faculty of Industrial Design Engineering of Delft University of
Technology. DfS focuses on research in the eld of sustainable development. The
mass consumption of goods and services should involve the continuous
improvement of environmental, economic and social-cultural values. The central
objective of the DfS research programme is the exploration, description,
understanding and prediction of problems and opportunities for innovating and
designing products and product service systems of superior quality.
For more information please visit www.io.tudelft.nl
Address: Delft University of Technology, Faculty of Industrial Design Engineering,
Design for Sustainability Program Landbergstraat 15, 2628 CE Delft,
the Netherlands Tel +31 (0)152782738; Fax +31 (0)152782956;
email: dfs-io@tudelft.nl
MOSO International was founded in the Netherlands in 1997 and since that time
has established itself as the European market leader in the development of
innovative and sustainable bamboo products in four product groups: ooring,
outdoor (cladding and decking), panels, veneer and beams and unlimited
solutions (customized solutions for industrial clients). Besides product excellence
and innovation, sustainability is one of the key drivers of our business. We
continuously strive to improve the already excellent environmental performance
of MOSO’s bamboo products and the company tries to communicate this in a
transparent manner following internationally accepted methodologies. This
INBAR Technical Report certainly contributes to that goal.
For more information about MOSO International please visit www.moso.eu.
Address: Adam Smithweg 2, 1689 ZW Zwaag, the Netherlands
Tel +31(0)229265732; email info@moso.eu
The publication of this report was supported by MOSO International BV
www.moso.eu
International Network for Bamboo and Rattan (INBAR)
PO Box 100102-86, Beijing 100102, P. R. China
Tel: +86-10-6470 6161; Fax: +86-10-6470 2166;
Email: info@inbar.int
www.inbar.int
ISBN: 978-92-95098-89-3 (printed)
978-92-95098-90-9 (online)
© 2015 INBAR - International Network for Bamboo and Rattan
Printed on recycled paper
Contents
1.INBAR Technical Repor t No. 35
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1.)Introduction)&)Scope)
2.)Scientific)background)of)the)LCA)and)the)CO2)cycle)
3.)Cradle@to@gate)calculations)on)bamboo)products
4.)End@of@life)calculations)on)bamboo)products)
5.)Calculation)of)carbon)sequestration)in)forests)and)buildings)
6.)Results:)Tables)on)combined)cradle@to@grave)calculations,)
))))including)carbon)sequestration
7.)Conclusion)and)discussion
The)potential)of)bamboo)for)climate)change)mitigation
8ee\o)Yield)of)land
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2.INBAR Technical Repor t No. 35
Foreword)
Changing consumption patterns are placing increasing pressure on the world’s
natural resources and fuelling nancial, food and climate crises around the globe.
A more sustainable approach to economic development is needed that accounts
for all components of the production and consumption processes, from the raw
materials used in production to the waste that is disposed after consumption.
This study considers whether the use of industrial products made from bamboo
can help to oset the environmental eects of climate change, provided the
bamboo is harvested from a natural forest or a plantation created to improve
degraded lands.
The study used a Life-Cycle Assessment (LCA) approach to gauge the
environmental impact, including the carbon footprint, of industrial products in
Western Europe made from bamboo and to compare it with that of more
commonly used materials such as tropical hardwood. The LCA also reveals how
each step of the production process aects the overall environmental impact of the
product. As a result of the assessment, MOSO International BV, the supplier of the
bamboo materials used in this study, has been able to improve many of its
production processes.
This report updates the environmental assessments made in the PhD thesis Design
Interventions for Stimulating Bamboo Commercialization by Pablo van der Lugt
(2008). The new data are based on the latest bamboo production gures and
updates of relevant databases.
The authors have assumed that the raw bamboo cited in the study, which is
sourced from China, originates from either natural bamboo stands or from
plantations established through a national landscape improvement programme.
This programme aims to transform slope agriculture and barren lands into healthy,
productive bamboo forest.
We hope that this study might be useful to manufacturers and other stakeholders
in bamboo and wood production chains that want to reduce the environmental
impacts of their products. It also shows the positive role that bamboo can play in
mitigating the eects of climate change and helping people to adapt to the impact
of climate change on their surroundings. By highlighting the potential of bamboo
to contribute to sustainable building practices, we also hope to increase its global
market share.
Dr. Hans Friederich
Director General, INBAR
October 2015
4.INBAR Technical Repor t No. 35
3.INBAR Technical Repor t No. 35
This report presents the results of a Life-Cycle Assessment (LCA) and carbon footprint analysis of a
selection of industrial bamboo products that are manufactured by the company MOSO International. The
analysis was done to determine the impact that their production and disposal have on the environment.
Bamboo ooring, decking, panels and beams have been evaluated.
A comprehensive explanation is oered of how carbon sequestration can be calculated, following LCA
methodology. This LCA is specic to the product evaluations described in this report and is not applicable
to other manufacturers’ products. The assessment described here is done for the production
(cradle-to-gate) plus the waste (end-of-life) stages of the bamboo products, but does not include the user
stage (negligable contribution and dependent on personal preferences), when the product is in use by
consumers after purchase.
Bamboo products are increasingly found in western markets, with recorded international trade of some
$1.86 bn in 2013, the majority of which is imported to European and North American consumer countries.
As bamboo products are increasingly perceived as “green” and environmentally friendly, it is important to
have an eective way to evaluate and verify these claims – to reassure producers and consumers, and help
producers nd ways to make their production system even “greener”. The LCA is a widely used and
recognized method for achieving this.
This study shows that if production parameters are optimised, these industrial bamboo products can have
a negative carbon footprint over their full life-cycle, from cradle to grave, based on use in Western Europe.
This means that the credits gained through carbon sequestration, and from burning to produce electricity
in a power plant at the end of each product’s life, outweigh the emissions caused by the production and
transport processes.
At end-of-life, it is assumed that 90% of the bamboo products are incinerated in an electrical power plant
and 10% will end-up in landll, a realistic scenario for Western Europe. The LCA was done in accordance
with ISO 14040 and 14044. In addition, the capture and storage (sequestration) of CO2 has been taken
into account.
It is hoped that the analysis described here will inform and encourage other bamboo producers to do
similar life-cycle analyses of their production systems, to better understand where they can focus
investments to reduce the environmental impacts of their products. It also aims to inform policy-makers
about the sustainability of bamboo products, to encourage them to specify the use of this resource in
national and international policies and investment plans.
Glossary
Executive0summary
Biogenic CO2 is captured in biomass during the growth of a plant or tree and, consequently, in a
biologically-based product.
Carbon footprint is a commonly used methodology in which the greenhouse gas emissions during the
life cycle of a product can be measured in terms of their kg CO2 equivalent (CO2e).
Carbon negative is a negative outcome of the carbon footprint of a product, i.e. when carbon credits
through carbon sequestration and energy production at the end of life phase are higher than the
emissions caused by production and transport.
Carbon sequestration is the process of capturing and storing atmospheric carbon dioxide, in this case
in bamboo biomass (forests and products).
Cradle-to-gate assessments describe the aggregated environmental impact of a product during
production, i.e. from resource extraction, transport and nal processing until it is ready for shipment to
the customer at the factory gate.
Cradle-to-grave assessments include the aggregated environmental impact of a product during the
use and end-of-life phases, thus throughout its full life cycle.
Eco-costs is an indicator in the Life-Cycle Assessment (see below) used to express the total
environmental burden of a product over its life cycle on the basis of the prevention of that burden.
Life-Cycle Assessment (LCA) is a methodology used to assess the environmental impact associated
with all stages of a product’s life cycle from cradle-to-grave (see above). In contrast to a carbon footprint
assessment, LCA is based on several environmental indicators which, besides the Global Warming
Potential (carbon footprint), also include acidication, eutrophication, smog, dust, toxicity, depletion,
land-use and waste.
Life-Cycle Inventory (LCI) is an element of the LCA, which involves the development of an inventory of
the ows of a product system, including inputs of water, energy, and raw materials and releases to air,
land, and water.
4.INBAR Technical Repor t No. 35
3.INBAR Technical Repor t No. 35
This report presents the results of a Life-Cycle Assessment (LCA) and carbon footprint analysis of a
selection of industrial bamboo products that are manufactured by the company MOSO International. The
analysis was done to determine the impact that their production and disposal have on the environment.
Bamboo ooring, decking, panels and beams have been evaluated.
A comprehensive explanation is oered of how carbon sequestration can be calculated, following LCA
methodology. This LCA is specic to the product evaluations described in this report and is not applicable
to other manufacturers’ products. The assessment described here is done for the production
(cradle-to-gate) plus the waste (end-of-life) stages of the bamboo products, but does not include the user
stage (negligable contribution and dependent on personal preferences), when the product is in use by
consumers after purchase.
Bamboo products are increasingly found in western markets, with recorded international trade of some
$1.86 bn in 2013, the majority of which is imported to European and North American consumer countries.
As bamboo products are increasingly perceived as “green” and environmentally friendly, it is important to
have an eective way to evaluate and verify these claims – to reassure producers and consumers, and help
producers nd ways to make their production system even “greener”. The LCA is a widely used and
recognized method for achieving this.
This study shows that if production parameters are optimised, these industrial bamboo products can have
a negative carbon footprint over their full life-cycle, from cradle to grave, based on use in Western Europe.
This means that the credits gained through carbon sequestration, and from burning to produce electricity
in a power plant at the end of each product’s life, outweigh the emissions caused by the production and
transport processes.
At end-of-life, it is assumed that 90% of the bamboo products are incinerated in an electrical power plant
and 10% will end-up in landll, a realistic scenario for Western Europe. The LCA was done in accordance
with ISO 14040 and 14044. In addition, the capture and storage (sequestration) of CO2 has been taken
into account.
It is hoped that the analysis described here will inform and encourage other bamboo producers to do
similar life-cycle analyses of their production systems, to better understand where they can focus
investments to reduce the environmental impacts of their products. It also aims to inform policy-makers
about the sustainability of bamboo products, to encourage them to specify the use of this resource in
national and international policies and investment plans.
Glossary
Executive0summary
Biogenic CO2 is captured in biomass during the growth of a plant or tree and, consequently, in a
biologically-based product.
Carbon footprint is a commonly used methodology in which the greenhouse gas emissions during the
life cycle of a product can be measured in terms of their kg CO2 equivalent (CO2e).
Carbon negative is a negative outcome of the carbon footprint of a product, i.e. when carbon credits
through carbon sequestration and energy production at the end of life phase are higher than the
emissions caused by production and transport.
Carbon sequestration is the process of capturing and storing atmospheric carbon dioxide, in this case
in bamboo biomass (forests and products).
Cradle-to-gate assessments describe the aggregated environmental impact of a product during
production, i.e. from resource extraction, transport and nal processing until it is ready for shipment to
the customer at the factory gate.
Cradle-to-grave assessments include the aggregated environmental impact of a product during the
use and end-of-life phases, thus throughout its full life cycle.
Eco-costs is an indicator in the Life-Cycle Assessment (see below) used to express the total
environmental burden of a product over its life cycle on the basis of the prevention of that burden.
Life-Cycle Assessment (LCA) is a methodology used to assess the environmental impact associated
with all stages of a product’s life cycle from cradle-to-grave (see above). In contrast to a carbon footprint
assessment, LCA is based on several environmental indicators which, besides the Global Warming
Potential (carbon footprint), also include acidication, eutrophication, smog, dust, toxicity, depletion,
land-use and waste.
Life-Cycle Inventory (LCI) is an element of the LCA, which involves the development of an inventory of
the ows of a product system, including inputs of water, energy, and raw materials and releases to air,
land, and water.
5.INBAR Technical Repor t No. 35
N_Xk`jC`]\:pZc\8eXcpj`j6
Life Cycle Analysis (also known as Life Cycle Assessment) is a means of systematically assessing the
environmental aspects of a product’s life, from raw material extraction to disposal and/or recycling
(“cradle to grave”). It is an accounting instrument to support environmental decision-making and
managing environmental risks. LCA is based on several environmental indicators which, besides the
Global Warming Potential (carbon footprint), also include acidication, eutrophication, smog, dust,
toxicity, depletion, land-use and waste. It can increase our understanding of how “environmentally
friendly” a product is and, because it looks at every stage in a product’s life, enable changes to be made
at the right stages of a product’s life-cycle to improve its environmental sustainability.
To standardise methods and procedures and ensure comparability and quality, the International
Standards Organisation developed standards for LCA (ISO 14040:2006) that are now the basis for many
of the LCAs conducted today.
An LCA comprises four components:
1. Goal and Scope denition - A description of the product under study, its function, aspects of the
life cycle to be studied and the purpose of the study.
2. Generation of a Life Cycle Inventory – a detailed account of all the inputs and outputs involved in
the dened environmental impact categories.
3. Inventory analysis - Components of the analysis are organised to enable evaluation of impacts in
commonly-used categories as dened at the outset. These enable specic questions to be
answered e.g. energy consumption, greenhouse gas emissions, resources depletion and so on.
4. Interpretation - the results are reported in the most informative way and the need and
opportunities to reduce the impact on the environment are evaluated.
1.#Introduction#&#Scope
Thermally modied bamboo decking applied in Rotterdam harbour
6.INBAR Technical Repor t No. 35
LCA’s are increasingly used to evaluate the environmental impacts of building products including timber
and other wood forest products, but have not yet been applied in the bamboo sector. Bamboo products
are increasingly found in western markets, with recorded international trade of almost USD $2bn in
2013, the large majority of which is imported into auent consumer countries and it is necessary that as
bamboo products are increasingly perceived as “green” and environmentally friendly that means of
evaluating this are employed. This can both reassure producers and consumers, and help producers to
nd ways of making the production system even “greener”.
Jg\Z`]`ZY\e\]`kjf]ZXiip`e^flkC:8jfeYXdYffgif[lZkj
LCAs must be scientically rigorous, and thus are technically challenging and time-consuming and may
be expensive. But the benets are many – they:
. Enable bamboo producers to prioritize investments to reduce the environmental impacts of the
product.
. Reduce production costs by informing decisions that can increase the eciency of resource use.
. Identify improvements to the product that make it better suited to the task it is designed for.
. Inform consumers of the environmentally-friendliness of the product, and thus help inform their
purchasing and usage decisions. LCAs also form the basis of Environmental Product Declarations
(e.g. http://www.environdec.com/) which are increasingly mandatory in sustainable building
certication systems such as LEED and BREEAM.
. Inform and engage policy-makers, and the environment-related policies and legislation they
produce, of the environmental status of the product.
. Help producers and retailers comply with relevant legislation, such as the display of
environmental data on packaging.
Bamboo splits are selected for pressing into boards at a factory in China
The report uses two single impact indicators, which have the advantage of expressing the combined
environmental impact of all environmental categories in a product’s life cycle in one number:
. The CO2 equivalent (carbon footprint), which can easily be understood and explained but
omits other polluting emissions (like SOx, NOx, carcinogens, ne dust, etc.)
. The eco-costs system, which incorporates all relevant environmental indicators in LCA.1
An important advantage of bamboo is its high growing speed. The sustainability issues related to the
resulting yield of land, typically excluded in LCAs, are dealt with in the Annex.
1 For more information, see Wikipedia http://en.wikipedia.org/wiki/Eco-costs
8.INBAR Technical Repor t No. 35
7.INBAR Technical Repor t No. 35
Because of their rapid growth and widespread applications, giant bamboo species such as Moso
bamboo (Phyllostachys pubescens), which is widely grown in China and forms the backbone of the
country’s bamboo sector, are increasingly seen as environmentally benign renewable material
alternatives to wood products. Whilst aspects of wood and bamboo production are similar, bamboo
production may involve longer production chains than wood products and compared to European
softwood, longer transport distances to market. These factors are likely to inuence the environmental
prole of the products and need to be investigated and quantied within the LCA.
This study is based on the product portfolio of MOSO International BV:
. Flooring & oor covering (solid strip, solid wide board, 2-ply ooring, industrial ooring,
attened bamboo)
. Thermally modied decking and cladding
. Panels & beams (solid panel, 1-ply panel, veneer, solid joist)
Engineered bamboo ooring products, e.g. bamboo top layer on a high or medium density breboard
(MDF / HDF) carrier, were excluded from the scope of the study.
The LCA looked at the production chain of bamboo products manufactured by MOSO International BV
following best practice and therefore is not typical for other industrial manufacturers of bamboo
products.
The LCA is based on a cradle-to-warehouse-gate plus end-of-life analysis as shown in Figure 1. The use
phase was kept out of the analysis, because the emissions in this step are negligible and are often based
on user preferences (e.g. to apply oil to a oor or to leave it untreated).
Figure 1: System boundary: cradle-to-gate plus end-of-life.
Manufacturing
(China)
Electrical power
plant (90%)
Landll and
municipal waste
incineration (10%)
MOSO
(Netherlands) Use
Plantation
(China)
Cradle-to-gate End-of-life
Bamboo has over 10, 000 uses, and more are added every year
The report uses two single impact indicators, which have the advantage of expressing the combined
environmental impact of all environmental categories in a product’s life cycle in one number:
. The CO2 equivalent (carbon footprint), which can easily be understood and explained but
omits other polluting emissions (like SOx, NOx, carcinogens, ne dust, etc.)
. The eco-costs system, which incorporates all relevant environmental indicators in LCA.1
An important advantage of bamboo is its high growing speed. The sustainability issues related to the
resulting yield of land, typically excluded in LCAs, are dealt with in the Annex.
1 For more information, see Wikipedia http://en.wikipedia.org/wiki/Eco-costs
8.INBAR Technical Repor t No. 35
7.INBAR Technical Repor t No. 35
Because of their rapid growth and widespread applications, giant bamboo species such as Moso
bamboo (Phyllostachys pubescens), which is widely grown in China and forms the backbone of the
country’s bamboo sector, are increasingly seen as environmentally benign renewable material
alternatives to wood products. Whilst aspects of wood and bamboo production are similar, bamboo
production may involve longer production chains than wood products and compared to European
softwood, longer transport distances to market. These factors are likely to inuence the environmental
prole of the products and need to be investigated and quantied within the LCA.
This study is based on the product portfolio of MOSO International BV:
. Flooring & oor covering (solid strip, solid wide board, 2-ply ooring, industrial ooring,
attened bamboo)
. Thermally modied decking and cladding
. Panels & beams (solid panel, 1-ply panel, veneer, solid joist)
Engineered bamboo ooring products, e.g. bamboo top layer on a high or medium density breboard
(MDF / HDF) carrier, were excluded from the scope of the study.
The LCA looked at the production chain of bamboo products manufactured by MOSO International BV
following best practice and therefore is not typical for other industrial manufacturers of bamboo
products.
The LCA is based on a cradle-to-warehouse-gate plus end-of-life analysis as shown in Figure 1. The use
phase was kept out of the analysis, because the emissions in this step are negligible and are often based
on user preferences (e.g. to apply oil to a oor or to leave it untreated).
Figure 1: System boundary: cradle-to-gate plus end-of-life.
Manufacturing
(China)
Electrical power
plant (90%)
Landll and
municipal waste
incineration (10%)
MOSO
(Netherlands) Use
Plantation
(China)
Cradle-to-gate End-of-life
Bamboo has over 10, 000 uses, and more are added every year
9.INBAR Technical Repor t No. 35
Sequestration – the capture and storage of CO2 in wood – is an important concept for sustainability. It is
also a highly complex topic that is subject to much discussion among experts. This chapter attempts to
clarify some of the issues around this complex topic, including delayed pulse and system expansion. For
a complete scientic analysis, see Vogtländer at al. (2014).
:XiYfej\hl\jkiXk`feXkk_\gif[lZkc\m\c
Biogenic CO2 is captured in wood/bamboo during the growth of a tree or stem. Figure 2 shows the
carbon pathway as it applies to a bamboo product. Here, there are no net carbon emissions, as carbon
captured in the plant when it grows is recycled back into the atmosphere later. It is stored in the products
the plant is used to produce and only released at the end-of the product’s life when it degrades or is
burned. If a product is burned in an electrical power plant, then the system generates electricity or heat
- which can replace electricity from fossil fuels and so gives the product ‘carbon credit’, a contribution
towards a negative carbon footprint. This phenomenon is known as the substitution approach in
consequential modelling.2 For a complete scientic analysis, see Vogtländer at al. (2014).
2 See Section 14.5 of the ILCD Handbook (ECJRC 2010).
Note: the text in this chapter is largely taken from Section 4 of Vogtländer et al. (2014)
2.Scientific*background*of*
***the*LCA*and*the*CO2*cycle*
The use of bamboo for outdoor applications is increasing in Europe and North America
10.INBAR Technical Repor t No. 35
Carbon sequestration can be included in an LCA if the bamboo is burned for electricity or heat. The positive
eect of temporary carbon storage in durable products cannot be analysed on the basis of a single product,
although an attempt to do so has been made in two important LCA systems – the ILCD Handbook (EC-JRC
2010) and the PAS 2050:2011 Specication (BSI 2011) – by providing a credit for the temporary storage of
carbon in bio-based products. However, this method results in an overestimation of the benets of
temporary xation of biogenic CO2 and should therefore be avoided (Vogtländer et al. 2014).
K_\\]]\Zkjf]ZXiYfej\hl\jkiXk`feXkk_\^cfYXcjpjk\dc\m\c
CO2 is stored in vegetation, in the ocean and in products (e.g. buildings and furniture). The details of
global carbon mass balances are very complex; however, understanding the basics of the LCA allocation
method used in this report requires starting from the highest possible aggregation level (the so-called
Tier 1 and Tier 2 approach of the Intergovernmental Panel on Climate Change - IPCC). Using this
approach, we look at vast forest areas (e.g. in Scandinavia, the Baltic countries, European Russia, Siberia,
Canada, New Zealand), where there is a continuous rotation of the forests. The local carbon
sequestration eects caused by harvesting are levelled out within such regions, since only a small
proportion of the trees are harvested each year.
Figure 3 provides a simplied schematic overview of this level of the global carbon cycle.
Figure 2: The CO2 cycle on a product level
Production
Bamboo MOSO Waste
Use
Bamboo
plantation End of life Electricity
Captured CO2
CO2
Figure 3: Global anthropogenic fluxes of CO2 (Gt/year) over the period 2000–2010
Ocean Combustion of
fossil fuels
Forests
0.8 Gt/year 2.2 Gt/year1.9 Gt/year 6.4 Gt/year
CO2
Figure 5 also shows that carbon storage in tropical areas is decreasing due to the conversion of
forests to agricultural or cattle land, the development of infrastructure and illegal logging of tropical
hardwood. Reduced impact logging is a better way to full the market demand for tropical
hardwood in a more sustainable way (e.g. van Dam and Savenije 2011, Hodgdon et al. 2015, Putz et
al. 2012). Nevertheless, it still reduces the carbon sequestration capacity and the biodiversity of
natural forests, although it does make the forest economically protable (certied wood), which can
help prevent clearcutting for landconversion to other uses.
Anthropogenic CO2 emissions on a global scale can be characterized by three main ows:
. Carbon emissions per year caused by burning fossil fuels: 6,4 Gt/year (Solomon et al. 2007)
. Carbon emissions per year caused by deforestation in tropical and sub-tropical areas
(Africa, Central America, South America, South and Southeast Asia): 1,93 Gt/year (FAO 2010)
. Carbon sequestration per year by regrowth of forests on the Northern Hemisphere (Europe,
North America, China): 0,85 Gt/year (FAO 2010).
It can be concluded that the global carbon cycle can be signicantly improved in the short term by
making the following changes:
. Burning fewer fossil fuels
. Stopping deforestation
. Intensifying the use of forests in the Northern Hemisphere through better management
and increasing sustainable wood production
. Aorestation (planting trees on soils that have not supported forests in the recent past)
As we have seen above, increasing the use of wood in buildings would appear to be an additional
approach. However, it is unrealistic to think that merely using more wood in design and construction will
lead to carbon sequestration and thus counteract global warming. Among other things, such a result
depends on the origin of the wood and the growth of wood markets. Yet it is clear that if there is no
change in the area of forests and no change in the volume of wood used in buildings, there will be no
change in the amount of sequestered carbon globally and hence no eect on carbon emissions. There
will be additional carbon sequestration only when more carbon is stored in forests (either by area
expansion or by increased productivity in existing forests through improved management), and when
the total volume of wood in buildings has increased. In boreal and temperate regions such as in Europe
and North America, for example, the forest area has been increasing steadily for several decades due to
aorestation and reforestation (see Figure 4), which has resulted in increased carbon storage over the
past few decades (see Figure 5).
12.INBAR Technical Repor t No. 35
11.INBAR Technical Repor t No. 35
Figure 6: Higher demand for tropical hardwood leads to deforestation and less carbon sequestration
Figure 5. Trends in carbon storage in forests from 1990–2010 (Source: FAO 2010)
Figure 4: Higher demand for boreal and temperate softwood from Europe and North America
leads to more carbon sequestration because of afforestation and reforestation.
Aorestation
Plantations
Naturally regenerated
Extra reforestation
Forest area
Time
120
100
80
60
40
20
0
Carbon stored in forests
(million tonnes)
1990
2000
2010
OceaniaEuropeAsiaAfrica South
America
North and
Central
Americal
Natural forests
Plantations
(Currently appox 35%-40% of FSC wood)
Forest area
Time
Deforestation
Loss of biodiverstity
Figure 5 also shows that carbon storage in tropical areas is decreasing due to the conversion of
forests to agricultural or cattle land, the development of infrastructure and illegal logging of tropical
hardwood. Reduced impact logging is a better way to full the market demand for tropical
hardwood in a more sustainable way (e.g. van Dam and Savenije 2011, Hodgdon et al. 2015, Putz et
al. 2012). Nevertheless, it still reduces the carbon sequestration capacity and the biodiversity of
natural forests, although it does make the forest economically protable (certied wood), which can
help prevent clearcutting for landconversion to other uses.
Anthropogenic CO2 emissions on a global scale can be characterized by three main ows:
. Carbon emissions per year caused by burning fossil fuels: 6,4 Gt/year (Solomon et al. 2007)
. Carbon emissions per year caused by deforestation in tropical and sub-tropical areas
(Africa, Central America, South America, South and Southeast Asia): 1,93 Gt/year (FAO 2010)
. Carbon sequestration per year by regrowth of forests on the Northern Hemisphere (Europe,
North America, China): 0,85 Gt/year (FAO 2010).
It can be concluded that the global carbon cycle can be signicantly improved in the short term by
making the following changes:
. Burning fewer fossil fuels
. Stopping deforestation
. Intensifying the use of forests in the Northern Hemisphere through better management
and increasing sustainable wood production
. Aorestation (planting trees on soils that have not supported forests in the recent past)
As we have seen above, increasing the use of wood in buildings would appear to be an additional
approach. However, it is unrealistic to think that merely using more wood in design and construction will
lead to carbon sequestration and thus counteract global warming. Among other things, such a result
depends on the origin of the wood and the growth of wood markets. Yet it is clear that if there is no
change in the area of forests and no change in the volume of wood used in buildings, there will be no
change in the amount of sequestered carbon globally and hence no eect on carbon emissions. There
will be additional carbon sequestration only when more carbon is stored in forests (either by area
expansion or by increased productivity in existing forests through improved management), and when
the total volume of wood in buildings has increased. In boreal and temperate regions such as in Europe
and North America, for example, the forest area has been increasing steadily for several decades due to
aorestation and reforestation (see Figure 4), which has resulted in increased carbon storage over the
past few decades (see Figure 5).
12.INBAR Technical Repor t No. 35
11.INBAR Technical Repor t No. 35
Figure 6: Higher demand for tropical hardwood leads to deforestation and less carbon sequestration
Figure 5. Trends in carbon storage in forests from 1990–2010 (Source: FAO 2010)
Figure 4: Higher demand for boreal and temperate softwood from Europe and North America
leads to more carbon sequestration because of afforestation and reforestation.
Aorestation
Plantations
Naturally regenerated
Extra reforestation
Forest area
Time
120
100
80
60
40
20
0
Carbon stored in forests
(million tonnes)
1990
2000
2010
OceaniaEuropeAsiaAfrica South
America
North and
Central
Americal
Natural forests
Plantations
(Currently appox 35%-40% of FSC wood)
Forest area
Time
Deforestation
Loss of biodiverstity
13.INBAR Technical Repor t No. 35
Carbon sequestration by wood in houses and oces is slowly rising globally due to population
growth. This additional carbon sequestration, however, is low in comparison with the volume of
biomass in the forests: less than 30% of the carbon above the ground ends up in housing (see
Section 5, Step 1 and Step 4 in Vogtländer et al [2014]) and for bamboo this dierence is even
greater. See also Chapter 5 of this report.
Another key issue is that carbon sequestration does not increase per house that is built, but per extra
house that is built beyond the number of houses required to replace discarded dwellings. This point
is often overlooked by LCA practitioners when studying carbon sequestration at the product level
during the LCI (Life-Cycle Inventory, i.e., analysis of all input and output ows in the product system)
phase of the assessment. This leads us to the conclusion that as a result of market growth, carbon
sequestration is enhanced when more boreal or temperate softwood from Europe and North
America is applied in buildings, since more carbon is sequestered in the forests as well as in
buildings. This has implications for bamboo as well. Creating additional demand for bamboo would
have an eect on carbon sequestration that is similar to that of European and North American wood,
leading to better forest management and an increase in bamboo forest area (Lou Yiping et al. 2010).
In chapter 5 it is explained that the carbon sequestration eect of bamboo is mainly caused by the
increase of plantations, rather than by the increase of bamboo products (e.g. bamboo in buildings).
Figure 7. Bamboo is increasingly used by Western architects as building material, for example in the Barajas International
Airport in Madrid designed by Richard Rogers.
14.INBAR Technical Repor t No. 35
3.#Cradle*to*gate#calculations#
####on#bamboo#products
The production system for bamboo from cradle-to-warehouse-gate is depicted in Figure 8.
The calculations are based on the production system used by the company MOSO International BV
for products consumed in the Netherlands:
. Type of bamboo: Phyllostachys Pubescens (density 700 kg / m3, length up to 15 m, diameter
on the ground 10-12 cm, wall thickness 9mm), also called ‘Moso bamboo;’
. Plantation and rst processing: the Anji region, Zhejiang province, China;
. Final processing: Hangzhou, Zhejiang province, and Jianyang, Nanping county, Fujian
province, both in China;
. The product is shipped via Shanghai and Rotterdam to the warehouse of MOSO International
BV in the Netherlands (Zwaag).
Bamboo is used in high-end cars as interior decoration
16.INBAR Technical Repor t No. 35
15.INBAR Technical Repor t No. 35
3 Note: a cogeneration plant for electricity and heat is an opportunity for the future that could reduce
the carbon footprint even further.
The three production technologies are further explained below and the LCI is provided for each
production technology.
A more comprehensive description of the production processes and tables for the other product
varieties can be found in van der Lugt (2008) and van der Lugt et al. (2009a, 2009b). The total scores
(carbon footprint as well as eco-costs) of the various industrial bamboo products are provided in
Chapter 6.
CXd`eXk`fef]jki`gjgcpYXdYff
Laminating ne, straight strips to produce panels, beams and ooring boards is the most common
technology for industrial bamboo products. The style is called plain pressed (at strips) or side
pressed (strips on side) depending on how the strips are positioned in the product. The strips can be
bleached (resulting in a natural colour), carbonized (resulting in a caramel colour) or double
carbonized (resulting in a chocolate colour). This type of bamboo product is referred to as
plybamboo.
The standard length of the bamboo strips is 2,66 metres throughout the Chinese bamboo industry.
Usually about 8 metres (3 x 2,66 m) of a harvested Moso bamboo stem will be used in the development
of bamboo products. The bottom two thirds of the 2,66 metres are mostly used for manufacturing
industrial bamboo materials, such as laminated bamboo boards, while the upper third is used in
smaller bamboo products, such as blinds and chopsticks. The bottom segments of the stem are rst
processed into rough strips (approximately 2 630 x 23 x 8 mm). This is done near the plantations. The
strips are then transported to the manufacturing site (See Figure 8). In the case of MOSO International
BV, the distance to the manufacturing site for laminated bamboo boards was 300 km.
Figure 9. Plybamboo boards are available in various colours, sizes and styles. In the plain pressed style; the nodes are clearly
visible (see the two pictures top right). In the side pressed version, they are less visible (two pictures bottom right).
The calculations for the LCAs have been made with the computer programme Simapro version 8.04,
applying LCI databases of Ecoinvent v3.1 (allocation, recycled content, 2014) and Idemat 2015 (a
database of the Delft University of Technology, partly based on Ecoinvent data).
In general, there are three main production techniques used for the development of industrial
bamboo products:
. Lamination of strips (700 kg / m3)
. Compression of rough strips / bres (1100-1200kg / m3)
. Flattened bamboo (850 kg / m3)
The eco-costs of various derived products can be calculated based on these production techniques.
For example, a 1-ply plybamboo panel and a 5-ply plybamboo panel are produced in a similar way
and a nished product will only have slightly lower (1-ply: less resin content, less pressing) or slightly
higher (5-ply: more resin, more pressing) eco-costs.
The necessary heat for manufacture is generated by combusting the sawdust and bamboo waste
produced during the manufacturing process3. Electricity is from the local grid.
15km
Harvesting
bamboo
Strip
manufacturing
Shanghai
harbour
300km
Plybamboo / SWB
factory
600km 19208km 115km
Rotterdam
harbour Warehouse
Figure 8. The production system for bamboo products used by MOSO International BV (cradle-to-warehouse-gate).
Bamboo cladding at AGC’s head oce in Belgium, designed by SAMYN + partners.
16.INBAR Technical Repor t No. 35
15.INBAR Technical Repor t No. 35
3 Note: a cogeneration plant for electricity and heat is an opportunity for the future that could reduce
the carbon footprint even further.
The three production technologies are further explained below and the LCI is provided for each
production technology.
A more comprehensive description of the production processes and tables for the other product
varieties can be found in van der Lugt (2008) and van der Lugt et al. (2009a, 2009b). The total scores
(carbon footprint as well as eco-costs) of the various industrial bamboo products are provided in
Chapter 6.
CXd`eXk`fef]jki`gjgcpYXdYff
Laminating ne, straight strips to produce panels, beams and ooring boards is the most common
technology for industrial bamboo products. The style is called plain pressed (at strips) or side
pressed (strips on side) depending on how the strips are positioned in the product. The strips can be
bleached (resulting in a natural colour), carbonized (resulting in a caramel colour) or double
carbonized (resulting in a chocolate colour). This type of bamboo product is referred to as
plybamboo.
The standard length of the bamboo strips is 2,66 metres throughout the Chinese bamboo industry.
Usually about 8 metres (3 x 2,66 m) of a harvested Moso bamboo stem will be used in the development
of bamboo products. The bottom two thirds of the 2,66 metres are mostly used for manufacturing
industrial bamboo materials, such as laminated bamboo boards, while the upper third is used in
smaller bamboo products, such as blinds and chopsticks. The bottom segments of the stem are rst
processed into rough strips (approximately 2 630 x 23 x 8 mm). This is done near the plantations. The
strips are then transported to the manufacturing site (See Figure 8). In the case of MOSO International
BV, the distance to the manufacturing site for laminated bamboo boards was 300 km.
Figure 9. Plybamboo boards are available in various colours, sizes and styles. In the plain pressed style; the nodes are clearly
visible (see the two pictures top right). In the side pressed version, they are less visible (two pictures bottom right).
The calculations for the LCAs have been made with the computer programme Simapro version 8.04,
applying LCI databases of Ecoinvent v3.1 (allocation, recycled content, 2014) and Idemat 2015 (a
database of the Delft University of Technology, partly based on Ecoinvent data).
In general, there are three main production techniques used for the development of industrial
bamboo products:
. Lamination of strips (700 kg / m3)
. Compression of rough strips / bres (1100-1200kg / m3)
. Flattened bamboo (850 kg / m3)
The eco-costs of various derived products can be calculated based on these production techniques.
For example, a 1-ply plybamboo panel and a 5-ply plybamboo panel are produced in a similar way
and a nished product will only have slightly lower (1-ply: less resin content, less pressing) or slightly
higher (5-ply: more resin, more pressing) eco-costs.
The necessary heat for manufacture is generated by combusting the sawdust and bamboo waste
produced during the manufacturing process3. Electricity is from the local grid.
15km
Harvesting
bamboo
Strip
manufacturing
Shanghai
harbour
300km
Plybamboo / SWB
factory
600km 19208km 115km
Rotterdam
harbour Warehouse
Figure 8. The production system for bamboo products used by MOSO International BV (cradle-to-warehouse-gate).
Bamboo cladding at AGC’s head oce in Belgium, designed by SAMYN + partners.
17.INBAR Technical Repor t No. 35
4 EURO 3 refers to the European Emission Standard for vehicles as of 2000. Trucks meeting this standard are often used in China
for local transport, sometimes trucks meeting more advanced emissions standards
(e.g. EURO 4 – 2005, EURO 5 – 2008 or EURO 6 -2014) are used as well.
Table 1: Input data and results in CO2 equivalent (carbon footprint, cradle-to-gate) of carbonized 3-layer laminated bamboo
board (consisting of two layers of 5 mm plain pressed at the outsides, and one layer of 10 mm side pressed in the core). The
functional unit (FU) used as the base element for this assessment is one board of 2440 x 1220 x 20 mm (2,98 m2), with a weight of
41,7 kilograms (based on a density of 700 kg/m3).
Description of process step
1. Cultivation and harvesting from
plantation
Gasoline consumption
2. Transport from plantation to strip
manufacturing facility
Eco-costs of a 5 tons truck (EURO 34, transport
of 23.1 FUs)
3. Strip making
4. Transport from strip manufacturing
facility to factory
Eco-costs (28 tons truck EURO3, 300km)
5. Rough planing
6. Strip selection
7. Carbonization
8. Drying carbonized strips
9. Fine planing
10. Glue application (1-layer boards)
Added amount of Melamine formaldehyde
(dry condition)
11. Pressing strips to 1- layer board
12. Sanding 1- layer board
13. Glue application (3-layer board)
Added amount Emulsion Poly Isocyanate
(dry condition)
14. Pressing three layers to one board
15. Sawing
16. Sanding 3-layer board
17. Dust absorption (during all steps)
18. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
19. Transport from harbour to harbour
Eco-costs (20ft container in a transoceanic
freight ship, 19208 km)
20. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL carbonized
Amount
0,224
30
1,38
12,51
8,62
4,73
9,66
5,8
0,483
1,89
1,62
0,908
1,65
0,29
0,86
8,67
12,51
801
4,80
Unit
liter / FU
km / truck
kWh/ FU
ton.km / FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
CO2e / FU
0,651
0,699
0,797
2,314
4,977
2,731
5,577
3,349
1,657
1,091
0,935
1,476
0,953
0,167
0,497
5,005
2,314
6,456
0,806
42,45
CO2e / kg
0,0156
0,0168
0,0191
0,0555
0,1193
0,0655
0,1337
0,0803
0,0397
0,0262
0,0224
0,0354
0,0228
0,0040
0,0119
0,1200
0,0555
0,1548
0,0193
1,018
Percentage
1,5%
1,6%
1,9%
5,5%
11,7%
6,4%
13,1%
7,9%
3,9%
2,6%
2,2%
3,5%
2,2%
0,4%
1,2%
11,8%
5,5%
15,2%
1,9%
100,0%
18.INBAR Technical Repor t No. 35
Table 2. Input data and results in eco-costs (€, cradle to gate) of carbonized 3-layer laminated bamboo board (consisting of two
layers of 5 mm plain pressed on the outside, and one layer of 10 mm side pressed in the core). The functional unit used as the base
element for this assessment is one board of 2,440 x 1,220 x 20 mm (2,98 m2), with a weight of 41,7 kilograms (based on a density of
700 kg / m3).
Description of process step
1. Cultivation and harvesting from
plantation
Gasoline consumption
2. Transport from plantation to strip
manufacturing facility
Eco-costs of a 5 tons truck (EURO 3, transport
of 23.1 FUs)
3. Strip making
4. Transport from strip manufacturing
facility to factory
Eco-costs (28 tons truck EURO3, 300km)
5. Rough planing
6. Strip selection
7. Carbonization
8. Drying carbonized strips
9. Fine planing
10. Glue application (1-layer boards)
Added amount of Melamine formaldehyde
(dry condition)
11. Pressing strips to 1- layer board
12. Sanding 1- layer board
13. Glue application (3-layer board)
Added amount of Emulsion Poly Isocyanate
(dry condition)
14. Pressing three layers to one board
15. Sawing
16. Sanding 3-layer board
17. Dust absorption (during all steps)
18. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
19. Transport from harbour to harbour
Eco-costs (20,ft container in a transoceanic
freight ship, 19,208 km)
20. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL carbonized
Amount
0,224
30
1,38
12,51
8,62
4,73
9,66
5,8
0,483
1,89
1,62
0,908
1,65
0,29
0,86
8,67
12,51
801
4,80
Unit
liter / FU
km / truck
kWh/ FU
ton.km / FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
Ecocosts/FU
0,215
0,094
0,185
0,488
1,153
0,633
1,292
0,776
0,541
0,253
0,217
0,616
0,221
0,039
0,115
1,159
0,488
3,268
0,153
11,90
Ecocosts/kg
0,0052
0,0023
0,0044
0,0117
0,0276
0,0152
0,0310
0,0186
0,013
0,0061
0,0052
0,0148
0,0053
0,0009
0,0028
0,0278
0,0117
0,0784
0,0037
0,285
Percentage
1,8%
0,8%
1,6%
4,1%
9,7%
5,3%
10,9%
6,5%
4,5 %
2,1%
1,8%
5,2%
1,9%
0,3%
1,0%
9,7%
4,1%
27,5%
1,3%
100,0%
19.INBAR Technical Repor t No. 35
:fdgi\jj`fef]ifl^_YXdYff]`Yi\j
A new production technology places rough bamboo strips in resin after which, under strong
compression, they are pressed in moulds to form high-density beams and panels. The result is an
extremely hard material (Brinell Hardness ≥ 9,5 kg / mm2 following EN 1534) that looks almost
identical to tropical hardwood. Because of the hardness, the material is ideally used for top layers of
ooring and panels for tabletops as well as for outdoor decking. A benet of this production
technology is that bamboo strips of lower quality can be used as inputs. The product is available in
natural or caramel colours and is known as ’High Density’ or ’strand woven bamboo.’ A recent
innovation thermally modies the input strips for outdoor use, and increases the durability to the
highest class possible (Class 1, according to EN 350). Due to the higher resin content (6,2% instead
of 3,5%) and compression, this product (brandname "Bamboo X-treme") has an even higher density
than the regular strand woven bamboo boards (1,200 kg / m3 instead of 1,080 kg / m3). However,
because of thermal modication (an energy-intensive process) and the increased resin content, the
environmental impact of this product is higher than that of regular strand woven bamboo.
Figure 10. Strand woven bamboo beams are made by compressing rough bamboo fibres in
moulds under very high pressure.
Figure 11. In the High Density and strand woven bamboo styles, the bamboo nodes are hardly visible.
20.INBAR Technical Repor t No. 35
Table 3. Input data and results in CO2 equivalent (carbon footprint, cradle to gate) of a carbonized strand woven bamboo beam.
The functional unit used as the base element for this assessment is one solid beam, gross size 1,900 X 110 X 140 mm, net size 1,800 x
100 x 130 mm with a weight of 25,3 kilograms (based on a density of 1,080 kg / m3).
Description of process step
1. Cultivation and harvesting of bamboo
on sustainable managed plantations
Gasoline consumption
2. Transport from plantation to strip
manufacturing facility
Eco-costs of a 5 tons truck (EURO 3, transport
of 23.1 FUs)
3. Strip making
4. Transport from strip manufacturing
facility to factory
Eco-costs (28 tons truck EURO3, 300km)
5. Rough planing
6. Splitting strips in half
7. Carbonization
8. Drying carbonized strips
9. Crushing strips
10. Glue application
Added amount of phenol formaldehyde
(dry condition)
11. Pressing strips to beam
12. Activating glue in oven
13. Sawing beams
14. Sanding beams
15. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
16. Transport from harbour to harbour
Eco-costs (19,208 km, 20 ft container in a
transoceanic freight ship)
17. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL carbonized
Amount
0,0832
30
0,8
7,44
5,28
0,8
2,8
5,624
1,36
1,68
2,32
2,8
0,352
0,188
7,44
476,8
2,88
Unit
liter / FU
km / truck
kWh/ FU
ton.km / FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
CO2e / FU
0,242
0,262
0,462
1,376
3,048
0,462
1,617
3,247
0,785
2,672
1,339
1,617
0,203
0,109
1,376
3,843
0,484
23,144
CO2e / kg
0,0096
0,0104
0,0183
0,0545
0,1206
0,0183
0,0640
0,1285
0,0311
0,1057
0,0530
0,0640
0,0080
0,0043
0,0545
0,1521
0,0191
0,916
Percentage
1,0%
1,1%
2,0%
5,9%
13,2%
2,0%
7,0%
14,0%
3,4%
11,5%
5,8%
7,0%
0,9%
0,5%
5,9%
16,6%
2,1%
100,0%
21.INBAR Technical Repor t No. 35
Table 4. Input data and results in eco-costs (€, cradle to gate) of a carbonized strand woven bamboo beam. The functional unit
used as the base element for this assessment is one solid beam, gross size 1,900 X 110 X 140 mm, net size 1,800 x 100 x 130 mm with
a weight of 25,3 kilograms (based on a density of 1,080 kg / m3).
Description of process step
1. Cultivation and harvesting of bamboo
on sustainable managed plantations
Gasoline consumption
2. Transport from plantation to strip
manufacturing facility
Eco-costs of a 5 tons truck (EURO3,
transport of 61,5 FUs)
3. Strip making
4. Transport from strip manufacturing
facility to factory
Eco-costs (28 tons truck EURO3, 300km)
5. Rough planing
6. Splitting strips in half
7. Carbonization
8. Drying carbonized strips
9. Crushing strips
10. Glue application
Added amount of Phenol formaldehyde
(wet condition)
11. Pressing strips to beam
12. Activating glue in oven
13. Sawing beams
14. Sanding beams
15. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
16. Transport from harbour to harbour
Eco-costs (19,208km, 20 ft container in a
transoceanic freight ship)
17. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL carbonized
Amount
0,0832
30
0,8
7,44
5,28
0,8
2,8
5,624
1,36
1,68
2,32
2,8
0,352
0,188
7,44
476,8
2,88
Unit
liter / FU
km / truck
kWh/ FU
ton.km / FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
Ecocosts/FU
0,08
0,035
0,107
0,290
0,706
0,107
0,374
0,752
0,182
1,074
0,310
0,374
0,047
0,025
0,290
1,945
0,092
6,793
Ecocosts/kg
0,0032
0,0014
0,0042
0,0115
0,0279
0,0042
0,0148
0,0298
0,0072
0,0425
0,0123
0,0148
0,0019
0,0010
0,0115
0,077
0,0036
0,269
Percentage
1,2%
0,5%
1,6%
4,3%
10,4%
1,6%
5,5%
11,1%
2,7%
15,8%
4,6%
5,5%
0,7%
0,4%
4,3%
28,6%
1,4%
100,0%
=cXkk\e\[YXdYff
Another recent technology involves cutting the original bamboo stem longitudinally in half and attening it
using a special steam treatment process, after which it can be used to produce ooring board. As with the
strand woven bamboo technology, a larger portion of the bamboo stem can be used as input materials (usually
the whole 8m stem). The best attened segments (2,66m in length) are used as top layer in ooring boards
because of their hardness (Brinell Hardness ≥ 9,5 kg/mm2; EN 1534), whereas lower quality boards (with small
visual defects, smaller width) are used as middle or bottom layers of the same 3-ply ooring board. This
production process is more ecient (a larger part of the input stem can be used; there is less waste) and less
glue is required than for plybamboo and strand woven bamboo.
22.INBAR Technical Repor t No. 35
Table 5. Input data and results in CO2 equivalent (carbon footprint, cradle to gate) of a flattened bamboo board. The functional
unit used as the base element for this assessment is one 3-ply flooring board, 1210x125x18 mm with a weight of 1,819 kilograms.
Description of process step
1. Cultivation and harvesting from
sustainably managed plantation
Gasoline consumption
2. Transport from plantation to factory
Eco-costs of a 5 tons truck (EURO3,
transport of 780 FUs)
3. Cutting stem segments longitudinally
in half
4. Removing internal parts of the stem
5. Removing outside parts of the stem
6. Shortening
7. Softening – vapour treatment
8. Flattening boards
9. Finalizing shape - press
10. Surface planing (2 sides)
11. Drying flat boards
12. Cutting to final width
13a. Glue application
Added amount Emulsion Poly Isocyanate
(dry condition)
13b. Pressing three layers to one board
14. Balancing (climate chamber)
15. Cutting to final length
16. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
17. Transport from harbour to harbour
Eco-costs (20ft container in a transoceanic
freight ship, 19,208 km)
18. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL
Amount
0,006
120
0,0066
0,079
0,026
0,006
0,013
0,063
0,079
0,070
0,459
0,0258
0,023
0,117
0,027
0,0158
0,546
35
0,21
Unit
liter / FU
km / truck
kWh/ FU
kWh/ FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
kWh/ FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
CO2e / FU
0,016
0,087
0,004
0,045
0,015
0,004
0,007
0,036
0,045
0,041
0,265
0,015
0,037
0,067
0,015
0,009
0,101
0,282
0,035
1,13
CO2e / kg
0,0090
0,0478
0,0021
0,0250
0,0083
0,0020
0,0040
0,0200
0,0250
0,0223
0,1457
0,0082
0,0206
0,0370
0,0085
0,0050
0,0555
0,1548
0,0193
0,620
Percentage
1,5%
7,7%
0,3%
4,0%
1,3%
0,3%
0,6%
3,2%
4,0%
3,6%
23,5%
1,3%
3,3%
6,0%
1,4%
0,8%
8,9%
25,0%
3,1%
100,0%
Figure 12. Flattened bamboo features the original bark of the bamboo stem as top layer.
23.INBAR Technical Repor t No. 35
Table 6. Input data and results in eco-costs (€, cradle to gate) of a flattened bamboo board. The functional unit used as the base
element for this assessment is one 3-ply flooring board, 1,210x125x18 mm with a weight of 1,819 kilograms.
Description of process step
1. Cultivation and harvesting from
sustainably managed plantation
Gasoline consumption
2. Transport from plantation to factory
Eco-costs of a 5 tons truck (EURO3,
transport of 780 FUs)
3. Cutting stem segments
longitudinally in half
4. Removing internal parts of the stem
5. Removing outside parts of the stem
6. Shortening
7. Softening – vapour treatment
8. Flattening boards
9. Finalizing shape - press
10. Surface planing (2 sides)
11. Drying flat boards
12. Cutting to final width
13a. Glue application
Added amount Emulsion Poly Isocyanate
(dry condition)
13b. Pressing three layers to one board
14. Balancing (climate chamber)
15. Cutting to final length
16. Transport from factory to harbour
Eco-costs (28 tons truck EURO3, 300km)
17. Transport from harbour to harbour
Eco-costs (20 ft container in a transoceanic
freight ship, 19,208 km)
18. Transport from harbour to warehouse
Eco-costs (28 tons truck EURO5, 115km)
TOTAL
Amount
0,006
120
0,0066
0,079
0,026
0,006
0,013
0,063
0,079
0,070
0,459
0,0258
0,023
0,117
0,027
0,0158
0,546
35
0,21
Unit
liter / FU
km / truck
kWh/ FU
kWh/ FU
kWh/ FU
kWh/FU
kWh/FU
kWh/FU
kWh/FU
kWh/ FU
kWh/FU
kWh/FU
kg / FU
kWh/FU
kWh/FU
kWh/FU
ton.km / FU
ton.km / FU
ton.km / FU
Ecocosts/FU
0,005
0,054
0,001
0,011
0,004
0,001
0,002
0,008
0,011
0,009
0,061
0,003
0,016
0,016
0,004
0,002
0,021
0,143
0,007
0,38
Ecocosts/kg
0,0030
0,0300
0,0005
0,0058
0,0019
0,0005
0,0009
0,0046
0,0058
0,0052
0,0337
0,0019
0,0086
0,0086
0,0020
0,0012
0,0117
0,0784
0,0037
0,208
Percentage
1,4%
14,4%
0,2%
2,8%
0,9%
0,2%
0,4%
2,2%
2,8%
2,5%
16,2%
0,9%
4,1%
4,1%
0,9%
0,6%
5,6%
37,7%
1,8%
100,0%
24.INBAR Technical Repor t No. 35
As explained in Chapter 2, a credit can be earned for avoided fossil fuels if the bamboo (or any other
bioproduct such as wood) is burned for electricity or heat.
In many Western European countries, the large majority of wood and bamboo products waste ends up
in electrical power plants. Although the eciency of a modern coal-red electrical power plant is higher,
i.e. 45% (IEA 2007), the current practice is to combust the biomass in smaller electrical power plants
specializing with an approximately 30% lower eciency than the large coal plants. It is estimated that
just 10% of the material perishes in landlls. The end-of-life credit for electricity production from bamboo
waste is (data from the Idemat database: Idemat2015 Hardwood 12% MC, bamboo, cork, combustion in
small electric power plant):
. Carbon footprint: 0,779 kg CO2 per kg of bamboo waste;
. Eco-costs: 0,145 € per kg of bamboo waste.
In this report we assume that 90% of bamboo products will eventually be combusted for the production
of electricity and/or heat, leading to a credit of:
. Carbon footprint: 0,779 x 0,9 = 0,70 kg CO2 per kg of bamboo product (MC 12%);
. Eco-costs: 0,145 x 0,9 = 0,131 euro eco-costs per kg of bamboo product (MC 12%).
Although the above scores are according to the formal LCA (ISO 14040 and 14044) and the European LCA
manual (EC-JRC 2010), the eects of the carbon sequestration at the global level must be taken into
account before the nal result can be calculated. This is treated in the next two chapters.
4.#End'of'life#calculations#on#
####bamboo#products#
25.INBAR Technical Repor t No. 35
The calculation of carbon sequestration resulting from land-use change and additional use of
bamboo products in the building industry involves ve steps (the calculation updates the data in
Vogtländer et al. [2014]:
1. Calculating the ratio of carbon stored in forests to carbon stored in end products (plybamboo,
strand woven bamboo, attened bamboo). This step complies with the baseline LCA
2. Calculating a land-use change correction factor to reect the fact that another type of biomass
existed in the area before it was changed to forests / plantations. This step complies with the
IPCC standards.
3. Calculating the additional stored carbon in forests and plantations (see Figure 4 in Chapter 2)
due to the growth of bamboo production and its allocation to the end products. This step is
more realistic than assigning credits for temporary carbon storage as described in PAS 2050
and the ILCD handbook. For more details, see Vogtländer et al. (2014).
4. Calculating the additional stored carbon in the building industry.
5. Calculating the total result of carbon sequestration requires the multiplication of the results of
Steps 1, 2, 3 plus the result of Step 4.
Detailed calculations are provided below for the Chinese bamboo production system. The
calculations relate to carbon sequestration in industrial bamboo products from cradle to grave. The
geographical system boundary is China, as dened by FAO (2010).
5.#Calculation#of#carbon#
sequestration#in#forests#and#
buildings#
26.INBAR Technical Repor t No. 35
Jk\g(%:XcZlcXk`e^k_\ZXiYfeiXk`f
An end product generally derives from a larger amount of biomass than is contained in its nal weight.
One kg of bamboo equates to about 0,42 kg of bamboo in the end product see also annex. The amounts
vary for dierent bamboo products:
. 0,42 kg d.m. of bamboo, is used in 0,425 kg d.m. attened bamboo (the resin content is on average
approx 1,3 % of the weight of attened bamboo), 0,431 kg d.m. plybamboo (the resin content is on
average approx 2,5 % of the weight of plybamboo),0,435 kg d.m. Strand Woven Bamboo - SWB (the
resin content is 3,5 % of the weight of SWB) and for thermally modied “outdoor” SWB 0,446 kg
d.m. (the resin content is on average approx 6,2% of the weight of outdoor SWB).
. One kg d.m. of attened bamboo originates from 1/0,425=2,35 kg dry matter above-ground
biomass on the bamboo plantation. One kg d.m. of plybamboo originates from 1/0,431=2,32 kg
d.m. above- ground biomass. One kg d.m. indoor strand woven bamboo originates from
1/0.435=2,30 kg d.m. above-ground biomass and one kg outdoor strand woven bamboo
originates from 1/0,446=2,24 kg above ground biomass.
. The carbon content of bamboo is 0,5 kg C per kg (Aalde et al. 2006, Verchot et al. 2006). With a molar
weight ratio of 3,67 for CO2 versus C, this leads to the following carbon storage on the plantation
related to above ground biomass: one kg d.m. attened bamboo is equivalent to storage of
2,35×0,5x3,67= 4,31 kg CO2; one kg d.m. plybamboo is equivalent to storage of 2,32×0,5x3,67=4,25
kg CO2; one kg d.m. indoor SWB is equivalent to storage of 2,30×0,50x3,67=4,22 kg CO2; and one
kg d.m. of outdoor SWB equals storage of 2,24 x0.5x3,67 = 4,11 kg CO2.
These numbers only concern the above ground biomass involved in the nal bamboo product. However,
for bamboo the most important aspect of carbon storage is underground because of the extensive root
system and carbon captured in the soil layer, with a ecosystem - stem ratio of 3.15. This number is
somewhat conservative compared with various recent studies found in Lou Yiping et al. (2010), see
footnote.
The additional CO2 stored underground that is related to bamboo products on the market should also
be taken into account, with the nal result that
. One kg d.m. attened bamboo is related to 4,31x3,1=13,37 kg CO2 storage in the bamboo
ecosystem;
. One kg d.m. plybamboo is related to 4,25x3,1=13,21 kg CO2 storage in the bamboo ecosystem;
. One kg d.m. indoor strand woven bamboo is related to 4,22x3,1=13,09 kg CO2 storage in the
bamboo ecosystem for the outdoor strand woven bamboo version, this is 4,11x3,1 = 12,75 kg
CO2 storage in the bamboo ecosystem.
5 Besides in the trunks, branches and shrubs, there is CO2 stored below ground in the soil and roots of a plantation. Zhou and
Jiang (2004) found that, for a medium intensity-managed Moso bamboo plantation in Lin’an, Zhejiang province, the
distribution of biomass above ground versus below ground is 32,2% and 68,8% respectively. Furthermore, Lou Yiping et al
(2010) reported the following “Moso bamboo forest ecosystem carbon storage capacity was reported to be between 102 t
C/ha and 289 t C/ha, of which 19-33% was stored within the bamboo culms and vegetative layer and 67-81% stored within
the soil layer (rhizomes, roots and soil carbon)."
28.INBAR Technical Repor t No. 35
The calculation
. Grassland: Total above-ground and below-ground non-woody biomass is 7,5 tonnes d.m./ ha (it
ranges from 6,5 to 8,5) with a carbon content of 47% (Verchot et al. 2006).
. The biomass on bamboo plantations is 35,8 x 3,1 = 111 tonnes7 d.m./ ha for biomass above and
below the ground (Van der Lugt 2009a&b, Zhou and Jiang 2004) with a carbon content of 50%.
. The land-use change correction factor for aorestation is therefore:
[(111 x 0,50) – (7,5 x 0,47)] / (111 x 0,50) = 0,936
Much of the additional Chinese bamboo production in the past has resulted from better management of
existing bamboo forests (Lou Yiping et al. 2010). In that case, the land-use change correction factor is 1
for additional bamboo production.
Note that in the case of converted shrubland (according to Aalde et al. [2006] the above ground biomass
is 60 tons d.m. for tropical shrubland in continental Asia with root-shoot ratio of 0,4 and carbon content
of 46%) to bamboo plantation the land-use change correction factor is [(111 x 0,50) – (84 x 0,46)] / (111 x
0,50) = 0,30
Jk\g*%:XcZlcXk`e^k_\X[[`k`feXcjkfi\[ZXiYfe`e]fi\jkjXe[`kj
XccfZXk`fe%
According to van der Lugt and Lobovikov (2008), the annual growth of the market for industrial bamboo
products in EU and China ranges between 17% and 25%. However, the establishment of new plantations
does not always follow increase in market demand directly but is delayed. This phenomenon was
highlighted in the 7th Chinese National Forestry Inventory (State Forestry Administration of P.R. China
2010) where it was shown that the area of bamboo resources in China in 2004-2008 grew from 4,84
million ha to 5,38 million ha in 2008, thus experiencing a growth of 11,18% in 5 years with an average
annual growth of 2,24%. The growth of tree forest area in China is at a similar level (11,74%) with a
growth of 174,91 million ha to 195,45 million ha during the same period (2004-2008).
More recent gures (2013) from China’s State Forestry Administration indicate that the growth of
bamboo forests and plantations in China has accelerated in recent years, with a growth from 5,38 million
ha in 2008 to 6,73 million ha in 2011; this corresponds to an annual growth of 8,36%. Based on a
conservative approach, the calculations in this report are based on an average bamboo coverage growth
from 2004 – 2011, which corresponds to an annual growth of 5,548.
Given the high GDP growth of the Chinese economy over this period (approximately 7.5%), a 5%
increase in new bamboo production seems to be a safe estimation for calculating the additional stored
carbon in new bamboo plantations. The related annual growth in carbon storage on plantations is
allocated to the total production of bamboo products: for every kg of bamboo, 0,05 kg relates to the
new plantations needed to cope with market growth, which adds to the global carbon sequestration
accordingly.
7 Note that Lou Yiping et al (2010) have reported considerably higher outputs (101.6-288.5 tC/ha), see also Footnote 5.
8 It must be mentioned here that this growth does not always require extra agricultural land. Much of the bamboo production
in the past has come from better forest management (Lou Yiping et al. 2010). in fact, one of the short term goals (2011-2015)
of the national bamboo development plan is to improve the quality (and therefore yield) of existing 1,9 mio forests (INBAR
2014). Moreover, due to the extensive root system, bamboo is planted in areas where farming is not feasible, e.g., on slopes
for erosion prevention and for rehabilitating degraded land and re-establishing functioning and productive ecosystems by
improving soil quality and restoring the water table (Kuehl and Lou Yping 2011).
Jk\g)%:XcZlcXk`e^k_\cXe[$lj\Z_Xe^\Zfii\Zk`fe]XZkfi%
The second step in the calculation relates to the fact that before aorestation, the land had also stored
biomass. In this case, the Tier 2 Gain-Loss Method (Verchot et al. 2006) of the IPCC is used to compare the
steady state before and after the land use change.
As shown in Step 3, there has been a large growth of the Moso bamboo-growing area over the past few
decades as a result of better forest management and the natural expansion of existing Moso bamboo
forests either on farmland or on shrubland. This fast growing species has the capacity to expand in area
by 1-3% every year (a gure that can be even higher if the process is facilitated by the right agricultural
practices). These secondary natural bamboo forests provide a large portion of the bamboo used in
industry. 6
Another reason for the expanded bamboo area is the reforestation of barren wasteland or poor farming
grounds (see example in Figure 12) to create bamboo plantations (among others) through the Grain for
Green programme of the Chinese government.
For the purposes of this report, it is assumed that the new plantations are established on grassland and
do not come at the expense of natural forests. This is a plausible assumption since a large portion of the
Moso bamboo resources comes from the industrialized provinces around Shanghai (Zhejiang, Fujian,
Anhui, Jiangxi). Furthermore, this assumption is in line with the current policy for aorestation and
natural forest protection of the Chinese State Forestry Administration (CSF 2013).
6 Note that despite the fast growth, in fewer than 5% of the plantations / managed bamboo forests used for industrial
bamboo production pesticide and / or fertilizer is used as prescribed in the Chinese standard for high yield Moso plantations
(GB/T 20391-2006). In a well-managed bamboo plantation / forest the fallen branches and leaves should provide sucient
nutrition for new shoots (this choice is also often made for economic reasons).
Figure 12. Typical barren grassland being prepared for rehabilitation with bamboo.
27.INBAR Technical Repor t No. 35
28.INBAR Technical Repor t No. 35
The calculation
. Grassland: Total above-ground and below-ground non-woody biomass is 7,5 tonnes d.m./ ha (it
ranges from 6,5 to 8,5) with a carbon content of 47% (Verchot et al. 2006).
. The biomass on bamboo plantations is 35,8 x 3,1 = 111 tonnes7 d.m./ ha for biomass above and
below the ground (Van der Lugt 2009a&b, Zhou and Jiang 2004) with a carbon content of 50%.
. The land-use change correction factor for aorestation is therefore:
[(111 x 0,50) – (7,5 x 0,47)] / (111 x 0,50) = 0,936
Much of the additional Chinese bamboo production in the past has resulted from better management of
existing bamboo forests (Lou Yiping et al. 2010). In that case, the land-use change correction factor is 1
for additional bamboo production.
Note that in the case of converted shrubland (according to Aalde et al. [2006] the above ground biomass
is 60 tons d.m. for tropical shrubland in continental Asia with root-shoot ratio of 0,4 and carbon content
of 46%) to bamboo plantation the land-use change correction factor is [(111 x 0,50) – (84 x 0,46)] / (111 x
0,50) = 0,30
Jk\g*%:XcZlcXk`e^k_\X[[`k`feXcjkfi\[ZXiYfe`e]fi\jkjXe[`kj
XccfZXk`fe%
According to van der Lugt and Lobovikov (2008), the annual growth of the market for industrial bamboo
products in EU and China ranges between 17% and 25%. However, the establishment of new plantations
does not always follow increase in market demand directly but is delayed. This phenomenon was
highlighted in the 7th Chinese National Forestry Inventory (State Forestry Administration of P.R. China
2010) where it was shown that the area of bamboo resources in China in 2004-2008 grew from 4,84
million ha to 5,38 million ha in 2008, thus experiencing a growth of 11,18% in 5 years with an average
annual growth of 2,24%. The growth of tree forest area in China is at a similar level (11,74%) with a
growth of 174,91 million ha to 195,45 million ha during the same period (2004-2008).
More recent gures (2013) from China’s State Forestry Administration indicate that the growth of
bamboo forests and plantations in China has accelerated in recent years, with a growth from 5,38 million
ha in 2008 to 6,73 million ha in 2011; this corresponds to an annual growth of 8,36%. Based on a
conservative approach, the calculations in this report are based on an average bamboo coverage growth
from 2004 – 2011, which corresponds to an annual growth of 5,548.
Given the high GDP growth of the Chinese economy over this period (approximately 7.5%), a 5%
increase in new bamboo production seems to be a safe estimation for calculating the additional stored
carbon in new bamboo plantations. The related annual growth in carbon storage on plantations is
allocated to the total production of bamboo products: for every kg of bamboo, 0,05 kg relates to the
new plantations needed to cope with market growth, which adds to the global carbon sequestration
accordingly.
7 Note that Lou Yiping et al (2010) have reported considerably higher outputs (101.6-288.5 tC/ha), see also Footnote 5.
8 It must be mentioned here that this growth does not always require extra agricultural land. Much of the bamboo production
in the past has come from better forest management (Lou Yiping et al. 2010). in fact, one of the short term goals (2011-2015)
of the national bamboo development plan is to improve the quality (and therefore yield) of existing 1,9 mio forests (INBAR
2014). Moreover, due to the extensive root system, bamboo is planted in areas where farming is not feasible, e.g., on slopes
for erosion prevention and for rehabilitating degraded land and re-establishing functioning and productive ecosystems by
improving soil quality and restoring the water table (Kuehl and Lou Yping 2011).
Jk\g)%:XcZlcXk`e^k_\cXe[$lj\Z_Xe^\Zfii\Zk`fe]XZkfi%
The second step in the calculation relates to the fact that before aorestation, the land had also stored
biomass. In this case, the Tier 2 Gain-Loss Method (Verchot et al. 2006) of the IPCC is used to compare the
steady state before and after the land use change.
As shown in Step 3, there has been a large growth of the Moso bamboo-growing area over the past few
decades as a result of better forest management and the natural expansion of existing Moso bamboo
forests either on farmland or on shrubland. This fast growing species has the capacity to expand in area
by 1-3% every year (a gure that can be even higher if the process is facilitated by the right agricultural
practices). These secondary natural bamboo forests provide a large portion of the bamboo used in
industry. 6
Another reason for the expanded bamboo area is the reforestation of barren wasteland or poor farming
grounds (see example in Figure 12) to create bamboo plantations (among others) through the Grain for
Green programme of the Chinese government.
For the purposes of this report, it is assumed that the new plantations are established on grassland and
do not come at the expense of natural forests. This is a plausible assumption since a large portion of the
Moso bamboo resources comes from the industrialized provinces around Shanghai (Zhejiang, Fujian,
Anhui, Jiangxi). Furthermore, this assumption is in line with the current policy for aorestation and
natural forest protection of the Chinese State Forestry Administration (CSF 2013).
6 Note that despite the fast growth, in fewer than 5% of the plantations / managed bamboo forests used for industrial
bamboo production pesticide and / or fertilizer is used as prescribed in the Chinese standard for high yield Moso plantations
(GB/T 20391-2006). In a well-managed bamboo plantation / forest the fallen branches and leaves should provide sucient
nutrition for new shoots (this choice is also often made for economic reasons).
Figure 12. Typical barren grassland being prepared for rehabilitation with bamboo.
27.INBAR Technical Repor t No. 35
30.INBAR Technical Repor t No. 35
29.INBAR Technical Repor t No. 35
Jk\g+%:XcZlcXk`e^k_\X[[`k`feXcjkfi\[ZXiYfe`eYl`c[`e^j%
The additional carbon sequestration in buildings relates to the bamboo products minus processing
losses, which we estimate at 10%. Taking into account the resin content in the end product (1,3% for
attened bamboo, 2,5% for plybamboo, 3,5% for indoor SWB and 6,2% for outdoor SWB), this results in:
. 0,987 x 0,9 x 0,5 x 3,67 = 1,63kg biogenic CO2 storage in the buildings per one kg d.m. of attened
bamboo. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,63 x 0,05 = 0,082 kg CO2 per kg d.m. of attened bamboo.
. 0,975 x 0,9 x 0,5 x 3,67 = 1,61 kg biogenic CO2 storage in the buildings per one kg d.m.
of plybamboo. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,61 x 0,05 = 0,081 kg CO2 per kg d.m. of plybamboo.
. 0,965 x 0,9 x 0,5 x 3,67 = 1,59 kg biogenic CO2 storage in the buildings per one kg d.m. of indoor
strand woven bamboo. Given the market growth described in Step 3, this results in the additional
carbon sequestration of 1,59 x 0,05 = 0,080 kg CO2 per kg d.m. of indoor strand woven bamboo.
. 0,938 x 0,9 x 0,5 x 3,67 = 1,55 kg biogenic CO2 storage in the buildings per one kg d.m. of outdoor
SWB. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,55 x 0,05 = 0,077 kg CO2 per kg d.m. of outdoor strand woven bamboo.
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The overall eect on carbon sequestration due to land-use change is calculated by multiplying the
results of Steps 1, 2, 3 and adding the results of Step 4:
. Flattened bamboo: Carbon sequestration = 13,37 x 0,936 x 0,05 + 0,082 = 0,707 kg CO2 per kg d.m.
of attened bamboo (0,637 kg CO2 at 10% MC); in eco-costs this equates to €0,095 per kg d.m. of
attened bamboo (€0,086 at 10%MC).
. Plybamboo: Carbon sequestration = 13,21 x 0,936 x 0,05 + 0,081 = 0,699 kg CO2 per kg d.m. of
plybamboo (0,629 kg CO2 at 10% MC); in eco-costs this equates to €0,094 per kg d.m. of
plybamboo (€0,085 at 10%MC).
. Strand woven bamboo (indoor): Carbon sequestration = 13,09 x 0,936 x 0,05 + 0,080 = 0,692 kg CO2
per kg d.m. of indoor strand woven bamboo (0,623 kg CO2 at 10% MC); in eco-costs this equates
to €0,093 per kg d.m. of indoor strand woven bamboo (€0,084 at 10%MC).
. Strand woven bamboo (outdoor): Carbon sequestration = 12,75 x 0,936 x 0,05 + 0,077 = 0,674 kg
CO2 per kg d.m. of outdoor strand woven bamboo (0,607 kg CO2 at 10% MC); in eco-costs this
equates to €0,091 per kg d.m. of outdoor strand woven bamboo (€0,082 at 10%MC).
These amounts can be allocated as credit in the LCA calculation.
The carbon sequestration credits for bamboo due to land change are higher than they are for wood.
European softwood acquires a credit for carbon sequestration as a result of land change of 0,17kg CO2
per kg softwood 10% MC. For detailed calculations, see Vogtländer et al. (2014).
There are several reasons why this is the case:
. The reforestation rate in China is higher for bamboo than it is in Europe for softwood. This is the
result of a faster market growth for bamboo products as and the higher reforestation potential of
bamboo on degraded lands.
. The root – shoot ratio of bamboo is generally higher than it is for wood. As a result of its extensive
root system, bamboo stores more CO2 under ground as in the surrounding soil.
. Unlike trees, which are usually clear cut each rotation cycle, the selective annual harvesting of
bamboo culms doesn’t kill the plant or damage the ecosystem and below-ground carbon is not
emitted as the bamboo forest continues to live on after harvest (Kuehl et al. 2011).
Due to the high speed of growth, the establishment time required for new bamboo plantations is a lot
shorter than for wood forests while bamboo plantations can also be planted in locations where it is
impossible to plant trees (e.g. on degraded slopes), making it a good crop for reforestation (see also
Chapter 7).
Industrial bamboo ooring complements the light and airy feeling of this oce in the Netherlands (photography: Fred Sonnega).
30.INBAR Technical Repor t No. 35
29.INBAR Technical Repor t No. 35
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The additional carbon sequestration in buildings relates to the bamboo products minus processing
losses, which we estimate at 10%. Taking into account the resin content in the end product (1,3% for
attened bamboo, 2,5% for plybamboo, 3,5% for indoor SWB and 6,2% for outdoor SWB), this results in:
. 0,987 x 0,9 x 0,5 x 3,67 = 1,63kg biogenic CO2 storage in the buildings per one kg d.m. of attened
bamboo. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,63 x 0,05 = 0,082 kg CO2 per kg d.m. of attened bamboo.
. 0,975 x 0,9 x 0,5 x 3,67 = 1,61 kg biogenic CO2 storage in the buildings per one kg d.m.
of plybamboo. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,61 x 0,05 = 0,081 kg CO2 per kg d.m. of plybamboo.
. 0,965 x 0,9 x 0,5 x 3,67 = 1,59 kg biogenic CO2 storage in the buildings per one kg d.m. of indoor
strand woven bamboo. Given the market growth described in Step 3, this results in the additional
carbon sequestration of 1,59 x 0,05 = 0,080 kg CO2 per kg d.m. of indoor strand woven bamboo.
. 0,938 x 0,9 x 0,5 x 3,67 = 1,55 kg biogenic CO2 storage in the buildings per one kg d.m. of outdoor
SWB. Given the market growth described in Step 3, this results in the additional carbon
sequestration of 1,55 x 0,05 = 0,077 kg CO2 per kg d.m. of outdoor strand woven bamboo.
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The overall