NOVEL TREATMENT OF BIODEGRADABLE MARKET WASTE WITH LABORATORY SCALE ANAEROBIC DIGESTERS USING PVC PIPESS. VENKATESH AND S. RAJUAbstract Anaerobic digestion of biodegradable solid wastes is being considered as an effective method of both management of solid wastes and also as a renewable source of energy in the form of biogas. Anaerobic digestion is the bacterial fermentation of organic wastes in the absence of free oxygen. Since the vegetable waste forms the major portion of organic waste and generation of biogas seems to be a viable waste management option. The present study focuses on the anaerobic digestion of vegetable waste using high solid digestion (HSD) of different designs. The performance of three types of HSD operated with vegetable waste as substrate was evaluated. The first type digester was with solid and liquid phase within the digester unit. The second type was a single unit without any phase separation. The third type of digester was with a separate solid and liquid phase units. The performance of type III digester was 8.9% higher than type 1 and 23.1% more than type II digester. The highest biogas yield in type III digester was found to be statistically significant at 99% confidential level.
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