Greenhouse gas emission of biogas production out of silage maize and sugar beet – An assessment along the entire production chain

摘要: Abstract The study delivers values on greenhouse gas (GHG)-emission via cultivation of silage maize and sugar beet GHG-saving potential electricity produced from biogas out both biomass crops. Data are based three rainfed crop rotation field trials in Germany (2011–2014) representative for Central Europe can serve as default values. It was found that GHG-emission driven mainly by nitrous oxide emission soil mineral N-fertilizer use 2575–3390 kg carbon dioxide equivalents (CO2eq) per hectare 2551–2852 kg CO2eq ha−1 (without digestate application). Integrating a GHG-credit surplus N the reduced total to 65–69% but only 84–97% beet. production calculated plants differing technical characteristics. potentials were generally >70% (silage maize: 78–80%, beet: 72–76%) authors concluded setting plant had slight impact only. Overall, assumed major GHG-emission's reduction along bioenergy chain N-management during methane losses at plant. Finally, beet, if cultivated rotation, shown be an efficient alternative order achieve higher diversity cultivation.