The invention relates to the technical field of
waste gas purification, in particular to a compound microbial inoculum and a preparation method and application thereof. The preparation method comprises the following steps: (A) carrying out
domestication of an original bacterial liquid; (B) carrying out
fermentation of a main strain; (C) carrying out mixed
fermentation of auxiliary strains; (D) stirring and mixing the main strain liquid and the auxiliary strain liquid, centrifuging, and taking a supernatant to obtain microbial
sludge; (E) stirring and mixing the microbial
sludge and a
drying protective agent, and
drying to obtain the compound bacterial inoculums of
petrochemical waste gas treatment. According to the preparation method of the compound microbial inoculum of the invention, strains are collected and domesticated in
petroleum pollution sources, the main strain is subjected to single
fermentation, the strains are subjected to directional mixed fermentation, the
bacteria liquids of single fermentation and mixed fermentation are mixed,
centrifugation is carried out to obtain the microbial
sludge, and the microbial sludge is mixed with the
drying protective agent to preparethe compound bacterial inoculums of
petrochemical waste gas treatment. The
production cycle is short, and the prepared microbial inoculum has high-efficiency degradation capability.