Table 1 Specifications of the sample concerning characteristics of the farms and biogas plants
Specifications | Sample |
|---|---|
Geographical setting of the farms | Baden-Württemberg, Bavaria, Brandenburg, Niedersachsen |
Farming types | Conventional and ecological |
Initial plant operation | Beginning of 1990s to 2005 |
Plant capacity | 20 to 600 KWel |
Temperature range of fermentation microorganisms | Mesophilic and thermophilic |
Substrates | Slurry, manure, and biomass |
Operated cogeneration plants | Both gas and pilot injection engines |
Location of biogas plant | Between 40 and 500 m to the residential building of the farms |