A techno-assessment approach on biogas yield from organic agriculture wastes of cauliflower and grape residues

In recent years, developing sustainable management by transforming organic biomass wastes into value-added products has become advantageous. Cauliflower (CF) and grapes are cultivated in hilly regions of India at all times, which facilitates the recycling of those waste into biogas generation for substantial energy share. This techno-assessment approach examines biogas yield via anaerobic co-digestion of feedstocks include CF, grape residue (GR) as substrates, dairy manure (DM) as inoculum and water (W) considering mass proportions of (GR:CF:DM:W) in case1: 50/10/10/30, case2: 10/50/10/30, case3: 15/45/10/30, case4: 30/30/10/30, and case5: 40/20/10/30. Real-time experimentation studies are carried out for 45 days in a 50 liter laboratory-type biogas digester under mesophilic conditions. The anaerobic digestion of each batch utilizing the selected feedstocks with 10.496, 10.935, 10.879, 10.713, and 10.602 kg of total volatile solids produces biogas yields of 0.584, 0.638, 0.704, 0.766, and 0.785 m3/kg VS. Furthermore, methane yields of 0.403, 0.451, 0.502, 0.559, and 0.580 m3/kg VS are attained. According to the results, anaerobic co-digestion of feedstocks in case5 promotes maximum biogas and methane yields, paving the path for greater value added transition from bio-mass waste to bio-gas as an alternate source of clean energy especially in hilly regions which has become more beneficial for improved energy conservation and management with eco-friendliness.