Composite microbial inoculum used for anaerobic fermentation of kitchen wastes

Abstract

The invention discloses a composite microbial inoculum used for the anaerobic fermentation of kitchen wastes, belongs to the field of micro-organisms, and solves the problem of the lack of a microbial inoculum suitable for performing anaerobic fermentation by taking kitchen wastes as a main raw material at present. The composite microbial inoculum comprises, in parts by weight, 8-15 parts of acid production bacteroides DSM 15896 fermentation liquor, 25-35 parts of long-chain fatty acid syntrophic aeromonas DSM 18709 fermentation liquor, 15-25 parts of clostridium sordellii ATCC9714 fermentation liquor, 20-28 parts of combined methanosaeta JCM10134 fermentation liquor and 22-27 parts of methanospirllum hungatei DSM864 fermentation liquor, wherein the effective viable counts of the fermentation liquors of the five bacteria aforementioned achieve more than 10<9> per millilitre respectively. The composite microbial inoculum disclosed by the invention is suitable for an anaerobic fermentation process taking the kitchen wastes as the main raw material, and capable of playing the roles of stabilizing the pH value of a fermentation system, promoting to bring forward the peak of methanogenesis, and increasing the total amount of methanogenesis after being inoculated in the fermentation system.

Description

technical field

[0001] The invention belongs to the field of microorganisms, and in particular relates to a composite bacterial agent made from a variety of microbial fermentation liquids. Background technique

[0002] At present, the total amount of municipal solid waste (municipal solid waste, MSW) in the world is increasing year by year, and a considerable part of it is catering waste. The annual production of kitchen waste in large and medium-sized cities in my country has reached 60 million tons. Food waste is perishable, smelly, acidified and easy to become the source of infection of viruses, pathogenic bacteria and pathogenic microorganisms under normal temperature conditions. Therefore, it should be treated scientifically and harmlessly, otherwise it will cause harm to the environment and human health. However, because food waste contains organic substances such as starch, dietary fiber, protein, and lipid, and is also rich in nitrogen, phosphorus, potassium, calciu...