Patent ID: 7736510
Filing Date: 2010-06-15
Classification: C02F,C12M,Y02E

Abstract:
1. A method for producing methane gas from organic wastes, comprising: (a) treating organic wastes with at least one of supercritical water and sub-critical water to convert the organic wastes into low molecular weight substances; (b) separating the treated substances into an oil phase, a water phase, and a solid phase, so that the water phase is collected; (c) feeding the water phase collected in step (b) into a methane fermentation vessel; and (d) subjecting the collected water phase to methane fermentation within the methane fermentation vessel, wherein in step (a), the organic wastes treated with at least one of supercritical water and sub-critical water are organic wastes that have not been subjected to methane fermentation within the methane fermentation vessel.