Composite microbial preparation and application thereof in sewage treatment

The invention discloses a composite microbial preparation and application thereof in sewage treatment, and belongs to the technical field of microbial preparations. The composite microbial preparation comprises at least one microorganism which contains one nitrifying bacterium at least; and at least one fibrous iron complex. The fiber iron complex is a fiber iron (III) complex. The composite microbial preparation disclosed by the invention not only can deeply remove COD, BOD5, ammonia nitrogen and TP in sewage at a proper temperature, but also can effectively remove COD, BOD5, ammonia nitrogen and TP in sewage at a low temperature. The invention also discloses any one of the following uses of the composite microbial preparation: use of the composite microbial preparation in sewage denitrification and/or dephosphorization; use in sewage deodorization and/or landfill leachate deodorization. and use in increasing the transparency of sewage. the invention also relates to application in preparation of sewage treat