Method for producing volatile fatty acid (VFA) from mushroom cultured residue through alkaline fermentation

The invention relates to the technical field of resource converting of organic solid wastes and particularly relates to a method for producing volatile fatty acid (VFA) from mushroom cultured residue through alkaline fermentation. The preparation method comprises the following steps: taking the mushroom cultured residue as a fermentation substrate, and taking anaerobically digested sludge as inoculating sludge; carrying out mechanical pulverization on dried mushroom cultured residue, adding distilled water into the powder so as to prepare a mixed solution with the solid content of 12% to 18%, mixing the mixed liquid with the inoculating sludge according to the volume ratio of 5: 1, and introducing nitrogen gas into the mixture for 3 to 5 minutes; controlling the reaction temperature to 35 DEG C and the stirring rate to 120r/min to 180r/min, maintaining the pH of a system to about 10, and carrying out alkaline fermentation on the mushroom cultured residue in an anaerobic environment for 4 to 7 days; carrying o