The invention relates to the technology of
biomass energy utilization, and aims to provide a kitchen waste and
sludge hydrogen-producing acidification
pretreatment method capable of increasing the
methane production rate. The method comprises the following steps: mixing the kitchen waste and the
sludge after crushing pretreatment, using the mixture and a
sulfuric acid solution to prepare a mixed liquid, performing
hydrolysis on the mixed liquid at 135 DEG C to obtain a starting crude; adding
yeast powder into the starting crude, inoculating dark-
fermentation hydrogenogens, feeding high-purity
nitrogen to build an anaerobic
fermentation environment, then performing dark-
fermentation hydrogen-producing deep acidification pretreatment at the constant temperature of 37 DEG C, and obtaining a
hydrogen-producing deep acidification pretreatment liquid; adding methanogens into the liquid, keeping the anaerobic environment at 37 DEG C, and performing
methane fermentation and coproduction. According to the method disclosed by the invention, the hydrogen-producing deep acidification pretreatment is utilized to obviously increase the
methane production rate; the rate peak time of the produced methane is reduced by about 50%; the
waste treatment and degradation time of the fermentation tank with a
unit volume is reduced by about 50%; the
waste treatment capacity of the single equipment in unit time is improved by about one time.