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About the authors
a social and economic assessment Andrew Barnett
a survey S K Subramanian
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acid aerobic agricultural wastes algae algal alternative anaerobic digestion analysis areas bacteria batch benefits biogas investment biogas plants biogas production biogas systems biogas technology calculated capital cattle cellulose chemical fertilizers community plants composting concentration considered cow dung crop Dena Bank digested slurry digester volume dilution discussed economic effects efficiency energy Engineering evaluation of biogas feed fermentation fertilizer value fuel gas production gasholder gobar gas heat hydrolysis ICAR impacts increase India industrial inputs Institute Korea KVIC labour litre loading rate Maharashtra manure materials ment mesophilic methane methanogenic mixed night soil nitrogen nutrients operating opportunity cost organic output Philippines ponds possible problems protein pyrolysis range recycling reduce Research retention rural Sathianathan SCBA sewage sludge slurry social solids studies substrate Table technical techniques temperature thermophilic tion treatment unit urea valuation village volatile water hyacinth