FEEDSTOCK PREPARATION FOR ANAEROBIC DIGESTION

摘要

A method of preparing feedstock for anaerobic digestion comprises heating green biomass 3 to a temperature of at least 6o °C and no more than 135 °C, preferably no more than 105 °C to produce a dried green biomass 8 having a dry solid content of at least 8o %. The green biomass may be waste from gardens, parks, farms, agricultural sites, woods or forests and includes material such as grass, plant cuttings, surplus fruit and vegetables, stalks, shrubs and tree branches. The dried green biomass may be separated into digestible leafy biomass which is transferred to an anaerobic digester and a woody biomass. Drying the green biomass renders the green biomass inert and inhibits natural decay during storage so maintains biogas potential. An apparatus for producing feedstock for anaerobic digestion comprises a dryer, which may be a conveyor belt drier, configured to heat the green biomass to a temperature of at least 6o °C and no more than 135 °C.