Studies on Biomethanation of Kitchen Waste

Biomethanation of kitchen waste is a feasible and viable option as these wastes contain high volatile solids (VS) and total solids (TS). The total solids and volatile solids content was 16.46 and 71.46% in kitchen wastes. Studies were carried out in the laboratory using 2.5 l amber glass bottle digesters. From the laboratory experimental results, among all the combination of cow dung and kitchen waste in the ratio of 1: 1, 1: 2 and 2: 1, the 2: 1 ratio with 15% TS produced a maximum of 14785 ml of biogas. The highest methane content was found as 71% in cow dung mixed with kitchen waste in the ratio of 2: 1 at 15% TS, whereas the kitchen waste alone produced 0.0629 m³ kg⁻¹ of methane per kg of VS added.