This report presents an environmental Life Cycle Assessment (LCA) of biogas produced form both maize silage and animal manure based on the technologies developed at Xergi A/S. The LCA comprises both environmental impacts and impacts on resource consumption and covers utilisation of the produced biogas for either heat and power generation or for transport in an upgraded and compressed form. The study is comparative and shows the environmental consequence of making biogas instead of the alternative use of the substrate. Biogas from manure is, thus, compared to the conventional storage and use of the manure as agricultural fertilizer, and biogas from maize silage is compared to using the same agricultural land for other bioenergy purposes.

Report