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Andersson, Johan and Brunge, Kristin and Walla, Tobias, 2017. Biogas från gödsel och gräs i kombination med dikalvsproduktion : möjligheter och begränsningar. Second cycle, A1N, A1F or AXX ( A1N). Uppsala: SLU, Dept. of Energy and Technology

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Abstract

Sweden has great potential for biogas production from manure, residues and energy crops. The environmental benefits are substantial, as the biogas production system reduces emissions from manure pits. The produced biogas can then also do well by replacing environmentally harmful electricity production or fuels.

In this project a model farm is studied. Specifications are taken partly from a real farm, and partly from assumptions based on literature and interviews. The model farm is 355 hectare, and has beef cattle production. The farm is expanding its grassland areas and the excess of grass production can be used as a substrate in a biogas plant, in combination with manure. This study also evaluates different promising energy grass varieties for biogas production, and in these comparisons reed canary grass and tall fescue get the best result.

Furthermore two scenarios are developed, based on information from the model farm. Scenario A deals with the construction of a biogas production plant at a single farm and Scenario B is based on a larger cooperative biogas factory with vehicle gas production. In scenario B it is proposed that the substrates from a larger constellation of substrate providers are digested together. The result shows that it can be difficult to reach financial profitability for scenario A, especially without governmental subsidies. Scenario B shows better profitability, but only if the produced gas can be sold at a sufficiently high price. The environmental benefits from the introduced biogas system are expected to be greatest in Scenario A, but only if the produced electricity is assumed to replace fossil-based electricity.

Main title:Biogas från gödsel och gräs i kombination med dikalvsproduktion
Subtitle:möjligheter och begränsningar
Authors:Andersson, Johan and Brunge, Kristin and Walla, Tobias
Supervisor:Nordberg, Åke and Strid, Ingrid
Examiner:Nordberg, Åke
Series:Projektarbete i energisystem / Sveriges lantbruksuniversitet, Institutionen för energi och teknik
Volume/Sequential designation:2017:1
Year of Publication:2017
Level and depth descriptor:Second cycle, A1N, A1F or AXX
Student's programme affiliation:TE2SY Energy Systems Engineering (admitted before July 1, 2010) 300 HEC
Department:(NL, NJ) > Dept. of Energy and Technology
Keywords:biogasanläggning, vall, vallodling, samrötning, klimatpåverkan, energigräs, energigrödor
URN:NBN:urn:nbn:se:slu:epsilon-s-6281
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-6281
Subjects:Energy resources management
Renewable energy resources
Processing of agricultural wastes
Language:Swedish
Deposited On:29 Mar 2017 11:27
Metadata Last Modified:29 Mar 2017 11:27

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