Biogas production on supplementation of paddy straw to cattle dung under semi-continuous system was carried out at 14-15% total solids concentration under laboratory conditions. Supplementation of 5% paddy straw to cattle dung led to maximum biogas production of 53.7 l/kg with volumetric productivity of 0.460 l/l/day accompanied by 24.0 and 26.4% degradation of total and volatile solids respectively. The C/N ratio of effluent slurry after 5% paddy straw supplementation to cattle dung was 30.7 that reduced to 21.9 on composting with Trichoderma reesei for one month resulting in the production of quality manure.
Biogas, Cattle dung, Paddy straw, Semi-continuous
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