Method for improving methane-producing performance under synergistic action of mixed quasi-synchronous fermentation of multiple raw materials

Abstract

The invention belongs to the field of treatment of organic solid wastes, and discloses a method for improving anaerobic gas-producing performance under the synergistic action of the mixed quasi-synchronous fermentation of multiple raw materials. By the method, organic wastes (straw, domestic garbage, excrement and the like) are subjected to the quasi-synchronous fermentation of multiple raw materials, namely the organic wastes are pretreated, so that the fermentation period of materials (such as the straw and the like) with a long fermentation period is shortened and is close to an average fermentation period of the mixed materials; the fermentation period of materials (such as garbage in restaurants and kitchens, excrement and the like) which are easy to digest is prolonged appropriate; and the pretreated materials are mixed, inoculated and subjected to anaerobic digestion to produce methane, so that the methane-producing period of the materials with the anaerobic digestion period is synchronous with that of the materials with the short anaerobic digestion period to realize the quasi-synchronous fermentation of the materials. The method is simple and high in operability; and by the method, two and more than two organic solid wastes are treated simultaneously, and the accumulative methane yield of unit volatile solid (VS) substances is improved by 15 to 60 percent averagely.

Description

technical field [0001] The invention belongs to the field of organic solid waste treatment, and specifically relates to a method for improving anaerobic gas production performance through the synergistic effect of multi-raw material mixing and near-synchronous fermentation Background technique [0002] my country is the country with the largest output of organic solid waste in the world, among which more than 700 million tons of straw, more than 3 billion tons of livestock and poultry manure are produced every year, and more than 100 million tons of fruit and vegetable waste are discarded every year, and only Beijing The daily output of kitchen waste has reached 1700t. Single use of straw as fermentation raw material, high carbon-nitrogen ratio of straw, high cellulose content, lack of nutrient elements, can not meet the requirements of normal anaerobic fermentation, the starting time of raw material anaerobic fermentation is long, the digestion cycle is long, and the degrada...

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Problems solved by technology

[0003] The purpose of the present invention is to be able to provide a method for improving the performance of anaerobic gas production through the synergistic effect of multi-raw material near-synchronous fermentation. The near-synchronous fermentation of raw materials proposed by the present invention can promote the generation of synergistic effect, and the method can solve the problem of single raw material anaerobic digestion , so as to provide data basis for engineering practice and improving gas production

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