After enrichment the species of PAO are reduced and concentrated.DPB includes Pseudomonas sppl Corynebacterium spp/Enterobacteriaceae spp and Staphylococcus spp.

• 富集后聚磷菌的种类减少且集中，反硝化聚磷菌以假单胞菌属、棒状杆菌属为主，肠杆菌科和葡萄球菌属次之。