John A. Posada

John A. Posada
Delft University of Technology | TU · Department of Biotechnology

About

88
Publications
24,499
Reads
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2,221
Citations
Citations since 2017
57 Research Items
1845 Citations
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Publications

Publications (88)
Article
Full-text available
In the face of the rapidly dwindling carbon budgets, negative emission technologies are widely suggested as required to stabilize the Earth’s climate. However, finding cost-effective, socially acceptable, and politically achievable means to enable such technologies remains a challenge. We propose solutions based on negative emission technologies to...
Article
Full-text available
There is global pressure to make advanced biofuels profitable. For cellulosic ethanol, three aspects remain as bottlenecks: feedstocks collection, pretreatment methods, and enzyme production. In this paper, the first aspect is investigated, by addressing the main challenges for logistics of agricultural residues. A logistic supply chain of corn sto...
Chapter
With the growing interest in aviation biofuels, various production alternatives have been developed and assessed, indicating that aviation biofuels have the potential to reduce emissions when compared to fossil-based kerosene. However, existing approaches for the design and ex-ante assessment of biofuel production tend to focus on techno-economic f...
Article
Full-text available
Although the energy transition results in decreased use of coal for power production, hard coal extraction will continue due to its importance in steel production and coal mine wastewater will continue generating after mines closure. The coal mining sector produces wastewater which results in environmental burdens and often contains valuable materi...
Preprint
In the face of the rapidly dwindling carbon budgets, negative emission technologies are widely suggested as required to stabilize the earth’s climate. However, finding cost-effective, socially acceptable, and politically achievable means to enable such technologies remains a challenge. We propose solutions based on negative emission technologies to...
Article
Full-text available
This study explores key success factors for ethanol production via fermentation of gas streams, by assessing the effects of eight process variables driving the fermentation performance on the production costs and greenhouse gas emissions. Three fermentation feedstocks are assessed: off-gases from the steel industry, lignocellulosic biomass-derived...
Chapter
This study describes a methodological framework designed for the systematic processing of experimental syngas fermentation data for its use by metabolic models at pseudo-steady state and at transient state. The developed approach allows the use of not only own experimental data but also from experiments reported in literature which employ a wide ra...
Article
Full-text available
The Mexican market for agricultural residues is disaggregated, making it inefficient in economic terms. In the last decades, irrigated agriculture has led to both increased yields and, consequently, to additional volumes of residues being produced, which are wasted. Apart from their traditional tradeoff applications as animal feed or as materials t...
Article
Full-text available
The objective of this paper is to compare, under Dutch market conditions, the energy consumption and net costs of membrane-based advanced treatment processes for three water reuse types (i.e. potable, industrial, agricultural reuse). The water source is municipal wastewater treatment plant effluent. Results indicate that the application of reverse...
Article
Full-text available
In this work, the techno-economic and exergy analyses of two gasification technologies with integration into heat and power combined cycles are presented: i). Circulating fluidized bed (CFB) and ii). Dual fluidized bed (DFB) systems. As feedstock, lignocellulosic biomass (sugarcane bagasse, SCB) was considered. The gasification process of the fluid...
Article
Full-text available
This work presents a strategy for optimizing the production process of ethanol via integrated gasification and syngas fermentation, a conversion platform of growing interest for its contribution to carbon recycling. The objective functions (minimum ethanol selling price (MESP), energy efficiency, and carbon footprint) were evaluated for the combina...
Presentation
Full-text available
Costos de producción de residuos agrícolas para etanol celulósico en México
Presentation
Full-text available
This presentation shows what social impacts are most investigated with Social LCA, in a chemical industry and circular economy context
Article
Full-text available
Biobased production has been promoted as an alternative to fossil‐based production to mitigate climate change. However, emerging concerns over the sustainability of biobased products have shown that tensions can emerge between different objectives and concerns, like emission reduction targets and food security, and that these are dependent on local...
Technical Report
Full-text available
As Coordination and Support Action for the Clean Sky 2 Technology Evaluator, TRANSCEND has carried out a literature study of alternative energy sources and novel propulsion. This study focuses on the reductions in CO2 and NOx emissions that can be obtained for large passenger aircraft (100+-seats) along the full life cycle from the production of th...
Chapter
Sustainable aviation fuels (SAF) are fuels that have potential to be sustainably produced and to generate lower carbon emissions when compared to the conventional kerosene. Wider SAF production and utilization represent nowadays an important step to move towards a more sustainable aviation industry, which has committed to significantly reduce their...
Article
Full-text available
Biobased production has been promoted as a sustainable alternative to fossil resources. However, controversies over its impact on sustainability highlight societal concerns, value tensions and uncertainties that have not been taken into account during its development. In this work, the consideration of stakeholders’ values in a biorefinery design p...
Article
Full-text available
In general, the certified pathways for the production of sustainable aviation fuels (SAFs) are still far from being competitive with fossil kerosene, although they have the potential to reduce greenhouse gas (GHG) emissions. However, the mitigation costs related to SAFs and how they compete with the carbon credits market remain unclear. The present...
Article
Full-text available
Although the potential of Alternative Jet Fuels (AJF) to reduce greenhouse gases (GHG) emissions has been widely reported upon in the literature, there are still discrepancies among the results. These may be due to the different GHG accounting methods, including those used by different Low-Carbon Policies (LCPs). To have a clearer understanding of...
Article
Full-text available
In this study the environmental impact of the anaerobic digestion (AD) of sewage sludge within an activated sludge wastewater treatment plant (WWTP) was investigated. Three alternative AD systems (mesophilic, thermophilic, and temperature-phased anaerobic digestion (TPAD)) were compared to determine which system may have the best environmental perf...
Article
Full-text available
Exergy and environmental analyses have been developed to determine the performance of the electricity generation in the Dutch mix. A comparative assessment of diverse technological routes, including fossil and renewable energy resources consumption, is carried out in terms of the exergy costs and specific CO2 emissions. Hence, an exergoeconomy meth...
Conference Paper
This study assesses the sensitivity of the technical, environmental and economic performance of three ethanol production process based on the fermentation of three gas mixtures: i) CO-rich flue gas from steel manufacturing, ii) biomass-based syngas with a H2/CO ratio of 2 and iii) a 3:1 combination between H2 and CO2. The sensitivity analysis is ba...
Conference Paper
Nowadays, the use of lignocellulosic materials to produce biofuels/electricity is a field of ever growing importance. Two options of the interesting residual biomass are sugarcane bagasse and straw. A technological pathway for the conversion of biomass is the thermochemical route. Hence, biomass gasification represents a promising technology within...
Article
Full-text available
Municipal wastewater cannot any longer be perceived as a waste stream because it contains water, energy, fertilizer and other products that can be recovered with innovative technologies in so called...
Article
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This paper guides decision making in more sustainable urban water management practices that feed into a circular economy by presenting a novel framework for conceptually designing and strategically planning wastewater treatment processes from a resource recovery perspective. Municipal wastewater cannot any longer be perceived as waste stream becaus...
Article
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The use of renewable jet fuels (RJFs) is an option for meeting the greenhouse gases (GHG) reduction targets of the aviation sector. Therefore, most of the studies have focused on climate change indicators, but other environmental impacts have been disregarded. In this paper, an attributional life cycle assessment is performed for ten RJF pathways i...
Article
Full-text available
Background: Ethanol production through fermentation of gas mixtures containing CO, CO2 and H2 has just started operating at commercial scale. However, quantitative schemes for understanding and predicting productivities, yields, mass transfer rates, gas flow profiles and detailed energy requirements have been lacking in literature; such are invalu...
Article
Full-text available
The life cycle human health (HH) impacts related to aviation biofuels have been understood in a limited way. Life cycle impact assessment (LCIA) methods for assessing HH are often associated with a high level of uncertainty and a low level of consensus. As a result, it remains challenging to perform a robust assessment of HH impacts with a suitable...
Article
Full-text available
In recent decades, academia has elaborated a wide range of technological solutions to recover water, energy, fertiliser and other products from municipal wastewater treatment plants. Drivers for this work range from low resource recovery potential and cost effectiveness, to the high energy demands and large environmental footprints of current treat...
Article
Full-text available
In this work, a model was developed to predict the performance of a bubble column reactor for syngas fermentation and the subsequent recovery of anhydrous ethanol. The model was embedded in an optimization framework which employs surrogate models (artificial neural networks) and multi-objective genetic algorithm to optimize different process condit...
Chapter
This study assesses the sensitivity of the technical, environmental and economic performance of three ethanol production process based on the fermentation of three gas mixtures: i) CO-rich flue gas from steel manufacturing, ii) biomass-based syngas with a H2/CO ratio of 2 and iii) a 3:1 combination between H2 and CO2. The sensitivity analysis is ba...
Article
Full-text available
This paper presents the process design and assessment of a sugarcane-based ethanol production system that combines the usage of both mass and heat integration (pinch analysis) strategies to enhance the process efficiency and renewability performance. Three configurations were analyzed: (i) Base case: traditional ethanol production (1G); (ii) mass-i...
Chapter
Full-text available
In this chapter we aim to give an overview of the main societal and ethical issues that are currently voiced around industrial biotechnology. We will illustrate this with some recent cases, such as the development of synthetic artemisinin, synthetic vanillin and vegetable oil produced by engineered algae. We show that current societal and ethical i...
Article
Full-text available
Syngas fermentation is one of the bets for the future sustainable bio‐based economy due to its potential as intermediate step in the conversion of waste carbon to ethanol fuel and other chemicals. Integrated with gasification and suitable downstream processing, it may constitute an efficient and competitive route for the valorization of various was...
Poster
Full-text available
Aim The present work aims to construct a mathematical model to simulate ethanol production through the fermentation of syngas with two compositions i.e., 100 % CO and a 3:1 H 2 :CO 2 mixture, inside a large-scale bubble column bioreactor. Particular attention was given to the quantitative aspect of the predictions delivered by the model. Results •...
Article
The impending restrictions on the sulfur content and greenhouse gas emissions of marine fuels represent a challenge for the maritime shipping industry and an opportunity for alternative fuels that may have lower environmental impacts but are not currently economically competitive. This study developed an integrated screening model to compare the te...
Article
Full-text available
The aviation industry accounts for more than 2% of global CO2 emissions. Biojet fuel is expected to make an essential contribution to the decarbonisation of the aviation sector. Brazil is seen as a key player in developing sustainable aviation biofuels owing to its long‐standing experience with biofuels. Nevertheless, a clear understanding of what...
Article
Derived from renewable feedstocks, aviation biofuel is generally perceived as inherently sustainable. However, its production involves a wide range of sectors and interacts with different actors in society. It is therefore important to understand and evaluate not only the environmental impacts of that process, but also its socioeconomic effects. At...
Article
Full-text available
Biomass feedstock can be used for the production of biofuels or biobased chemicals to reduce anthropogenic greenhouse gas (GHG) emissions. Earlier studies about the techno‐economic performance of biofuel or biobased chemical production varied in biomass feedstock, conversion process, and other techno‐economic assumptions. This made a fair compariso...
Article
Full-text available
The Brazilian government aims to increase the share of biofuels in the energy mix to around 18% by 2030, which implies an increase of ethanol production from currently 27 bln liters to over 50 bln liters per year. Biofuel policies play an important role in ethanol production, consumption, and investment in processing capacity. Nevertheless, a clear...
Article
Full-text available
Selection of optimal technologies for novel biobased products and processes is a major challenge in process design, especially when are considered many alternatives available to transform materials into valuable products. Furthermore, such technological alternatives vary in their technical performances and cause different levels of economic and env...
Conference Paper
It has been more than a decade already that controversies over biofuels and biobased production sparked. These controversies highlighted, not only uncertainties around these innovations, but also value conflicts about the use of natural resources and industrial production in relation to sustainability (Mukhtarov et al. 2016). To address these aspec...
Conference Paper
Full-text available
The aviation sector goals in reducing its carbon emissions has boosted the interests in Renewable Jet Fuels (RJF). Nowadays, among the approved pathways of RJF, it is listed the dehydration-oligomerization of ethanol with following hydrogenation. The use of ethanol in Brazil would be a strategic alternative to produce RJF at short/medium terms, bec...
Article
Social dimension appears to be the least developed of all dimensions of sustainability, not receiving the same attention as environmental or economic dimension. While biomass utilization is considered to have considerable impact on the social well-being of farmers and local communities, a better understanding of its social sustainability is urgentl...
Article
The incorporation of sustainability in the design of biorefineries is central for the development of the biobased economy. In this paper sustainability methods and metrics in current biorefinery design practices are analyzed to identify challenges and opportunities for future improvements in the field. Generally, there is a need for an integral ana...
Article
This study presents the design and assessment of site-specific supply chains and related manufacturing processes for the production of bio-based chemicals from the syngas platform and via gasification of lignocellulosic biomass followed by syngas fermentation. The supply chains include feedstocks production and collection, biomass gasification, syn...
Article
Full-text available
This paper shows a detailed analysis of a biomass HTL process by considering changes in three main reaction variables (i.e. catalysts (water, Na2CO3(aq.), and Fe(aq.)), temperature (280 – 340 °C), and catalysts/biomass mass ratio (0 – 0.33 kg catalysts/kg biomass)) , and by assessing their influence on the techno-economic and GHG emissions performa...
Article
Full-text available
This study presents a techno-economic analysis and an environmental assessment, of the whole production chain (biomass production, sugar extraction, biomass pretreatment, sugars fermentation, and products recovery and purification), of a fully autarkic sugarcane-based biorefinery for biojet fuel production. All scenarios considered correspond to 1s...
Article
An early stage assessment method is applied to the production of isobutanol from lignocellulosic biomass, and to three multiproduct portfolios from the conversion of isobutanol: Case 1: production of isobutyl acetate and glycerol tert-butyl ether (GTBE), Case 2: production of isobutyl acetate and ketones, and Case 3: production of isobutyl acetate...
Article
Production of second generation ethanol can be accomplished with biomass gasification followed by syngas fermentation using acetogenic bacteria in a hybrid process. Using process simulation and financial analysis, this study evaluated the feasibility of producing hydrous ethanol from sugarcane bagasse in a conceptual hybrid plant designed to be ene...
Chapter
The integral utilization of biomass for energy, chemicals, and materials production, within the concept of biorefineries, has been considered to have potential benefits for economy, environment, and society. However, concerns exit about their expansion and consequences for human well-being at different scales. This chapter introduces the concepts o...
Article
Lignin has the potential to be a sustainable resource for producing biobased chemicals (e.g. phenols, aromatic hydrocarbons, vanillin) for multiple applications. However, given its heterogeneous and rigid structure, its efficient conversion to value added products remains one of the most important limiting factors for the successful viability of th...
Article
The development of a bio-based economy is seen as a key strategy towards a sustainable society in a world facing climate change, energy security and social distress. However, since substantial uncertainty is involved in early-stage design analyses, the ranking and identification of potential sustainable solutions is a challenging task. This work ai...
Article
Full-text available
This study covers four main aspects of the conceptual design of sustainable integrated microalgae-based biorefineries using flue gas from CO2-intensive industries (i.e. 100% CO2): i) screening of technologies (4 options for cultivation, 3 for culture dewatering, 3 for cell disruption, 4 for lipids extraction & purification, and 4 for fractions upgr...
Article
This paper assesses whether a cleaner and more sustainable production of the chemical building blocks methyl crotonate (MC) and methyl acrylate (MA) can be obtained in an innovative process in which resource consumption, waste generation and environmental impacts are minimized by using polyhydroxybutyrate (PHB) produced from wastewater as feedstock...
Article
A systematic methodology to critically assess and screen among early stage design alternatives was developed for the use of glycerol. Through deterministic sensitivity analysis it was found that variations in the product’s and feedstock prices, total production cost, fixed capital investment as well as discount rate, among others, have high impact...
Article
In this paper, eight optimal biorefinery concepts for biofuels and biochemicals production are critically analyzed and compared in terms of their techno-economic performance and associated economic risks against historical market fluctuations. The investigated biorefinery concepts consider different combinations of biomass feedstock (lignocellulosi...
Chapter
To support the development of inherently sustainable biobased conversion processes we present an early R&D stage assessment method. The five pillars of this method enable the assessment of key sustainability dimensions like economics, environmental impacts, health, safety, and risks while dealing with early R&D challenges such as limited data avail...
Article
This study aims to identify potential bio-based derivatives from the conversion of platform chemicals at early design phases. To do this, an existing early-stage sustainability assessment method was extended, to cover both catalytic and biochemical conversion processes in biorefinery systems. The method combines proxy indicators describing economic...
Article
In this study, several strategies to upgrade lignocellulosic biorefineries for production of value-added chemicals are systematically generated and evaluated with respect to economic and sustainability objectives. A superstructure-based process synthesis approach under uncertainty integrated with a sustainability assessment method is used as evalua...
Conference Paper
Abstracts: * Computer-Aided framework for Sustainable Process Design_12MAy.docx (37.7KB) - Uploading Abstracts
Article
A technological scheme for producing 1,3-propanediol from raw glycerol was designed, simulated, and economically assessed. The production process was composed of three main stages, namely: glycerol purification, glycerol fermentation, and 1,3-propanediol recovery and purification. First, a typical stream of raw glycerol was purified up to 98 wt %,...
Article
In this work technical and economic analyses were performed to evaluate the glycerol transformation into Polyhydroxybutyrate using Bacillus megaterium. The production of PHB was compared using glycerol or glucose as substrates and similar yields were obtained. The total production costs for PHB generation with both substrates were estimated at an i...