The invention discloses a microbial
flora for producing
methane and
organic acid by
anaerobic degradation of
biomass as well as a culture method and application of the microbial
flora. The microbial
flora comprises the following components in percentage by weight: 5%-30% of
Clostridium, 2%-10% of Paludibacter, 1%-25% of Thermovirga, 2%-20% of DMER64, 2%-20% of Mesotoga, 1%-10% of
Methanosaeta and 1%-10% of Methanobacterium. The culture method of the flora comprises the following steps: S1, taking
pectin, straws and fallen leaves,
drying, and
grinding the straws into
powder by using a
mortar; s2, mixing
pectin degrading
bacteria and residual
sludge, inoculating the mixture into a culture
bottle, adding a culture medium, and adding the
powder obtained in the step S1 into the culture medium; s3,
mixed gas of
nitrogen and
carbon dioxide is introduced, the culture
bottle is sealed, continuous culture is performed for 30-100 days at the temperature of 30-38 DEG C, and
pectin and
cellulose hydrolysis flora enrichment is performed; the microbial flora can quickly hydrolyze and convert
biomass such as straws and fallen leaves into
methane,
acetic acid, propionic acid,
butyric acid or
hexanoic acid products; compared with conventional pretreatment
modes such as alkali treatment and high-
temperature treatment, the method has the advantages of high yield, mild operation conditions, low operation cost and the like.