The present invention relates to the treatment of organic solid wastes through anaerobic digestion within a short retention time of 7 days without mechanical mixing. The two stage process comprises of an Acidification phase in which organic content of solid waste is leached out to make a high strength liquid by decomposition of waste and a Methanation phase in which this high strength leachate is treated in a high rate Upflow Anaerobic Sludge Blanket reactor to produce biogas. The present invention produces non-flowable slurry after waste digestion and recycles water within the process resulting in reduced water consumption and aesthetic conditions around the plant.
Indian Patent Application Number: 2655/Del/97
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