Adding gas from biomass to the gas grid - SGC

Figure 18: Distribution of capacity of installed electrical power by scaleSource: Fachverband Biogas e.V.The German Federal Office for Agriculture & Food (FOAF) has agreed on practicable legalrequirements to grow energy crops on set-aside-land (Stillegungsflächen). FOAF finally approved aprocedure of scrutinization of non-food utilization, which was acceptable to the farmers. In 2000,about 164 farmers digested energy crops (80% of it is silo maize) grown on a total area of 970 ha.Compared to 1999, the increase is about 400%. A further steep growth may be anticipated [lit.55].The potential biogas production from anaerobic digestion is indicated in table 42. The feedstocksources from manure, waste and energy crops are shown in detail in table 43.Source10 9 m 3 per year PJ/year 1)Agriculture 15.05 324Sewage sludge 1.05 23Communal biowaste 1.23 26Industry trade 0.18 4Total 17.50 3761): Assuming an average lower heating value of 21.5 MJ/m 3 (60% CH 4 , 40% CO 2 ).Table 42: Potential biogas production from anaerobic digestion in Germany [lit.56]page: 84