Organic fertilizer prepared by comprehensively utilizing beer production waste and preparation method thereof

The invention belongs to the technical field of microbial fermentation engineering, and particularly relates to an organic fertilizer prepared by comprehensively utilizing beer production waste and a preparation method thereof. The organic fertilizer is prepared by mixing and fermenting the following components in parts by weight: 100 parts of beer sludge, 5-10 parts of a mixed bacillus enrichment culture solution and 5-20 parts of a saccharomycetes enrichment culture solution. The adopted waste thermal condensation product and waste diatom ooze contain available saccharides, nutrients capable of promoting microbial growth and a small amount of active yeast cells, which provide conditions for propagation and enrichment of sludge strains. The fermentation time and the harmless period can be remarkably shortened by inoculating the waste thermal condensation product and the waste diatom ooze into beer sludge for fermentation, and deodorization is basically achieved in about 7 days under a temperature control con