Patent ID: 8852312

Claim:
A method for biological treatment of biodegradable waste, the method comprising the steps of: loading mixed solid waste on a conveyor belt; passing the conveyor belt containing the mixed solid waste through a magnet chamber for separating metal parts from the mixed solid waste; passing the conveyor belt containing mixed solid waste through at least one separator, wherein biodegradable waste is separated from recyclable inorganic waste of mixed solid waste; collecting the separated biodegradable waste in a first storage tank; passing the separated biodegradable waste from the first storage tank to a primary treatment tank; treating the biodegradable waste in the primary treatment tank, wherein the treating in the primary treatment tank comprises mixing the biodegradable waste with hot water having temperature ranging from 70° C. to 140° C. to kill pathogens and simultaneously rotating the mixture with a rotor, then allowing natural settling, and repeating this treatment step at least twice for separating supernatant that contains non-degradable material from the naturally settled material, to form prepared sludge; dehydrating and compacting the prepared sludge; grinding and chopping the prepared sludge in a second storage tank to increase the surface area thereof; storing the prepared sludge in a third storage tank at a temperature ranging from 30° C. to 60° C.; treating the prepared sludge in a Biological Treatment Plant-I, wherein the prepared sludge is treated with a fluid comprising microbes, under anaerobic conditions, temperature ranging from 35° C. to 40° C., and pH of about pH 5.5 to pH 6.5, to form a treated slurry; treating the treated slurry in a Biological Treatment Plant-II, wherein the treated slurry is treated with enzymes, under anaerobic conditions, temperature ranging from 35° C. to 40° C., and pH of about pH 7.1 to pH 8.2; and treating the treated slurry in a Biological Treatment Plant-III, wherein the treated slurry is treated with thermophilic bacteria under anaerobic conditions at temperature ranging from 35° C. to 40° C.