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Publications (31)
In northern Sweden there are currently about 500 hectares of cultivated reed canary grass (RCG). RCG is harvested in late autumn or early spring, and is primarily used as bedding material. While reed canary grass has been used
as a solid fuel, currently it cannot compete with the cost of other solid fuels.
This project investigated the feasibilit...
There is a growing awareness of the climate impact of agricultural production, not least from cattle farms. Major sources of GHG emissions from milk production are enteric fermentation followed by fossil fuel use and manure/soil management systems. This study analyzes the potential to eliminate fossil fuel use from milk production farms in Sweden,...
This report provides an insight into what the consequences may be for the Swedish food supply if the possibility to import sufficient quantities of fossil energy decreases. The situation described is an imaginary situation that could come up quickly and unexpectedly by eg political unrest or natural disaster. There has been no preparation time for...
The production of mineral nitrogen represents a large fossil energy input in Swedish agriculture. However, mineral nitrogen can be produced in the Haber-Bosch synthesis, with input from renewable energy. This could lower the dependency on fossil energy and the emissions of greenhouse gases in agricultural production. The aim of this study was to in...
The project aim is to evaluate whether it is more advatagous to dry horse manure befor combustion with respect to technical function, cost, enerfy turnover and climae impact. Measurements of furnace performance wer conducted on-site. Measurements of furnace performance when using pure horse manure, wood chips or a combination of both toghether with...
Life cycle assessment (LCA) and life cycle costing (LCC) are well-established methods used for many years in many countries for system analysis of waste management. According to standard LCA procedure the assessment should include improvement analysis, in many cases this is performed by simple sensitivity analyses. An obstacle to perform more thoro...
The agricultural industry today consumes large amounts of fossil fuels. This study used consequential life cycle assessment (LCA) to analyse two potential energy self-sufficient systems for organic arable farms, based on agricultural residues. The analysis focused on energy balance, resource use and greenhouse gas (GHG) emissions. A scenario based...
This study analysed a future hypothetical organic farm self-sufficient in renewable tractor fuel. Biomass from the farm was assumed to be transported to a central fuel production plant and the fuel returned to the farm, where it was utilised in fuel cell powered tractors. The land use, energy balance and environmental impact of five different scena...
An analysis of the environmental effects and resource consumption by four systems for management of wastewater and organic household waste in a new city area have been performed, as follows: (1) conventional system complemented with advanced sludge treatment for phosphorus recovery, (2) blackwater system with urine diversion and food waste disposer...
Ammonium nitrate and calcium ammonium nitrate are the most commonly used straight nitrogen fertilisers in Europe, accounting for 43% of the total nitrogen used for fertilisers. They are both produced in a similar way; carbonate can be added as a last step to produce calcium ammonium nitrate. The environmental impact, fossil energy input and land us...
The effects of making a 1000 ha organic farm self-sufficient in renewable fuel were studied. Biomass grown on-farm can be transported to large fuel production facilities and the fuel transported back to the farm. Two fuels, Fischer-Tropsch diesel (FTD) and dimethyl ether (DME), produced from either straw or short-rotation willow coppice (Salix), we...
The aim of the present work was to evaluate systems for making organic farms self-sufficient in bio-based fuels. The energy efficiency and environmental load for systems based on rape methyl ester (RME), ethanol and biogas produced by processing raw material from the farm in industrial-scale plants were evaluated using a life cycle perspective. Eve...
Recycling of plant nutrients in sewage products to arable land is considered to be a step towards a more sustainable society. Sewage sludge is the predominant sewage fertiliser product available today, but the use of sewage sludge in agriculture has been questioned as regards hazardous substances. In this respect, blackwater from separating systems...
The aim of this work was to evaluate systems making organic farms self-sufficient in farm-produced bio-based fuels. The energy balance and environmental load for systems based on rape methyl ester (RME), ethanol and biogas were evaluated using a life cycle perspective. Complete LCAs were not performed. Important constraints when implementing the sy...
Different waste treatment options for municipal solid waste have been studied in a systems analysis. Different combinations of incineration, materials recycling of separated plastic and cardboard containers, and biological treatment (anaerobic digestion and composting) of biodegradable waste, were studied and compared to landfilling. The evaluation...
Organic household waste is a resource that is not fully utilised in Denmark today through composting or anaerobic digestion. On a yearly basis about 1,7million tons of household waste is collected. The organic part is about 700000 tons. To get a better understanding of the consequences when increasing biological treatment of organic household waste...
A simulation model, ORWARE (ORganic WAste REsearch) is described. The model is mainly used as a tool for researchers in environmental systems analysis of waste management. It is a computer-based model for calculation of substance flows, environmental impacts, and costs of waste management. The model covers, despite the name, both organic and inorga...
Energy turnover, and environmental and economic consequences of different municipal
solid waste management systems have been studied in a systems analysis. Different
combinations of incineration, recycling of separated plastic and cardboard packages and
biological treatment (anaerobic digestion and composting) of easy degradable organic
waste, were...
Consequences for energy turnover, environmental impact and economy of different management systems for municipal solid waste have been studied in a systems analysis. In the systems analysis, different combinations of incineration, materials recycling of separated plastic and cardboard containers and biological treatment (anaerobic digestion and com...
Energy, environmental, and economic consequences of different management systems
for municipal solid waste have been studied in a systems analysis. In the systems
analysis, different combinations of incineration, materials recycling of separated plastic
and cardboard containers, and biological treatment (anaerobic digestion and
composting) of easil...
Energy, environmental, and economic consequences of different management systems
for municipal solid waste have been studied in a systems analysis. In the systems
analysis, different combinations of incineration, materials recycling of separated plastic
and cardboard containers, and biological treatment (anaerobic digestion and
composting) of easil...
Energy, environmental, and economic consequences of different management systems
for municipal solid waste have been studied in a systems analysis. In the systems
analysis, different combinations of incineration, materials recycling of separated plastic
and cardboard containers, and biological treatment (anaerobic digestion and
composting) of easil...
Energy, environmental, and economic consequences of different management systems
for municipal solid waste have been studied in a systems analysis. In the systems
analysis, different combinations of incineration, materials recycling of separated plastic
and cardboard containers, and biological treatment (anaerobic digestion) of easily
degradable or...
Syftet med detta arbete är att visa på möjligheter för det svenska jordbruket att bli försörjt med drivmedel även i en framtid, när oljan har blivit för dyr eller sällsynt för att kunna användas i tillräcklig omfattning. Detta projekt studerar möjligheterna att ersätta fossil diesel med första och andra generationens förnybara drivmedel, och omfatt...
