The present invention is a first stage of the microorganism and the reaction mixture and the waste water and the drain water that flows from the culture tank is a biological treatment; A second step of incorporating a coagulant induce settlement of the waste; And process the filtered see Chemical Oxygen Demand (COD) a third step of inducing a reduction in; relates to the performance of the improved waste water treatment comprising the and drain water management system, Bacillus subtilis DB9011 (Bacillus subtilis DB9011) strain (microorganism accession number of FERM BP-3418), Bacillus Lee Kenny Po Ms (Bacillus licheniformis) strain (microorganism accession No. KCCM-11118P) and Bacillus poly flops mentee kusu (Bacillus polyfermenticus) strain (microorganism accession number of KCCM-10104) using possible a more rapid purification, including the flocculant input stage a high treatment efficiency, but at the same time as having a superior deodorizing effect, Bacillus subtilis DB9011 strain, Bacillus Lee Kenny Po Ms strains and Bacillus poly flops mentee in a filtration with a view to kusu strain environmentally friendly as possible to significantly reduce the content of nitrogen, phosphorus and organic matter The.