两级序批式MBR除磷特性实验研究

Research on phosphorous removal characteristics of two-stage sequencing batch MBR

为解决常规MBR工艺中脱氮除磷矛盾问题,采用新的工艺形式——两级序批式MBR工艺(两级SBMBR),对该工艺的除磷特性进行了实验研究。研究结果表明,在系统稳定运行阶段,SBMBR1内聚磷菌优势生长,进水总磷得以高效去除,再通过SBMBR2内膜的进一步截留,系统TP平均值0.46 mg/L,满足城市景观环境用水水质要求;在沉淀期间,POAs的释磷作用对生物除磷系统的影响甚至超过了水中剩余悬浮富磷污泥颗粒本身的影响,所以在满足沉淀要求的前提下,生物除磷系统应注意尽量缩短沉淀时间。

To resolve the conflict between nitrogen removal and phosphorous removal in traditional MBR,the novel two-stage sequencing batch MBR（TSBMBR） was applied,and research on phosphorous removal characteristics was studied.The results indicated that,during stable operation period,phosphorous accumulating organisms（PAOs） was accumulated in SBMBR1 and total phosphorous in the influent could be removed efficiently.After membrane filtration in SBMBR2,the average TP concentration in the effluent was 0.46 mg/L,which could reach scenic environment use criteria.During sedimentation period,the phosphorous removal efficiency was highly influenced by the release of phosphorous from PAOs rather than the suspended phosphorous accumulating sludge in the effluent.After satisfying sedimentation requirement,the settling time should be reduced as much as possible in the biological phosphorous removal system.