Enhancing the sewage treatment effect, reducing membrane fouling, and increasing microbial community diversity by a novel biofiller-carrying functional bacteria Rhodococcus sp. CPZ24 in a moving bed biofilm reactor

Abstract

The feasibility of using a novel moving bed biofilm reactor (fbMBBR) with biofiller-carrying functional bacteria, Rhodococcus sp. CPZ24, to alleviate membrane pollution and improve wastewater treatment was studied. Three membrane reactors, namely, a biofilm reactor (MBR), a convention moving bed biofilm reactor (MBBR), and fbMBBR, were compared. The results showed that the efficiency of sewage treatment by the fbMBBR was significantly better than that of the MBR and MBBR. When the HRT and DO were 6 h and 3 mg·L−1, the removal rates of NH4+-N, COD, TN, and TP in the fbMBBR reached 92.76 %, 89.89 %, 82.24 %, and 68.23 %, respectively, and membrane fouling was effectively alleviated. Furthermore, the novel biofiller improved the abundance of dominant microbial community species on the membrane module and strengthened microbial community functions. In summary, this study presented a novel fbMBBR with excellent performance in sewage treatment, reducing membrane pollution.