Abstract: Biogas generation is one of the most promising renewable energy sources. Anaerobic digestion is one of the effective ways of generating biogas. The effect of various wastes of Cow Dung(CD), Rumen(RU), Agar Waste(AW) and Sewage Sludge(SS) were collected in different sources on biogas production at mesophilic condition. A laboratory experiments was carried out using in 5 litre of glass bottles working volume on a batch reactor for over 40days. The preparation of slurry in different ratio of mixture of wastes the control of CD,RU,AW and SS, 1:1 ratio of RU:AW, AW:SS, SS:RU and 1:1:1 ratio of RU:AW:SS. There was designated in T0, T1, T2, T3, T4, T5, T6, and T7 respectively. All the treatments were prepared in triplicates. Biogas production was measured indirectly water displacement method. The results indicated that the mixture of 1:1:1 ratio (T7) slurry provide the higher biogas yield of 3886.30ml and then followed by T2, T3 and T6 treatments gave average yield of 3190.35, 2068.65 and 1804.51ml. The result showed fastest onset gas flammability from T7 and T6 treatments after 4th days. The results obtained shows that the pH of the mixture(T4 & T7) before and after the biogas provided a reading 3.4&4.2 and 6.9&7.0. This both treatments maximum increased of pH in after digestion 3.5&2.8. The biogas production could eliminate its disposal problems and create another abundant source of sustainable energy. The result of study also indicates that the biogas production process is economically feasible.

Keywords: Cow Dung, Rumen waste, Agar waste, Sewage Sludge, Flammable, Biogas, etc.,