振动MBR结合精确曝气与回流强化脱氮除磷  

Improving Nitrogen and Phosphorus Removal by Vibrating MBR with Precise Aeration and Recirculation

作　　者：薛涛[1] 张彩云[1] 孙大阳 陈春生[1] 俞开昌[1] 黄霞[2] XUE Tao;ZHANG Caiyun;SUN Dayang;CHEN Chunsheng;YU Kaichang;HUANG Xia(Beijing Origin Water Technology Co.,Ltd.,102206;School of Environment,Tsinghua University,100084:Beijing,China)

机构地区：[1]北京碧水源科技股份有限公司,102206 [2]清华大学环境学院,100084,北京

出　　处：《水处理技术》2024年第10期109-114,共6页Technology of Water Treatment

基　　金：国家重点研发计划项目课题“多目标城市污水资源化核心工艺与模式”(2022YFC3203103)。

摘　　要：为探索一种利用反硝化聚磷菌(DPAOs)与反硝化聚糖菌(DGAOs)强化脱氮除磷的新工艺手段,在一座传统曝气MBR工艺的市政污水处理厂内开展了新型振动MBR工艺结合精确曝气与回流控制技术的中试研究。在膜池MLSS为12~15 g/L、膜通量为20 L/(m^(2)·h)时,振动MBR中试TMP稳定保持在10~25 kPa,膜振动电机平均电耗为0.042 kWh/m^(3),比水厂曝气MBR膜吹扫风机电耗降低了61.8%。在精确曝气与回流控制下,中试好氧池前端DO低于0.5 mg/L,后端DO保持在0.3~1.2 mg/L;前缺氧池后端硝氮保持在2~3 mg/L,厌氧池硝氮接近0 mg/L,提供了有利于内碳源合成与利用的生化环境条件。振动MBR结合精确控制显著强化了反硝化除磷与内源反硝化作用,中试缺氧吸磷量占缺氧与好氧吸磷量之和的比例超过了40%,后缺氧池内源反硝化脱氮量较水厂提升了1~3 mg/L,最终出水总氮较水厂降低了3~6 mg/L。在中试厌氧池投加乙酸钠后系统脱氮除磷效果进一步提升,出水总氮与总磷分别稳定低于5 mg/L与0.5 mg/L。中试的硝化菌、反硝化菌、DPAOs与DGAOs相对丰度分别比水厂提高了0.76%、1.15%、1.96%与0.58%,其中Dechloromonas与CandidatusCompetibacter分别为主要的DPAOs与DGAOs菌属。To investigate a new approach to improve nitrogen and phosphorus removal by DPAOs and DGAOs,a pilot scale study using novel vibrating MBR(V-MBR)combined with precise aeration and recirculation control was conducted in a traditional air sparging MBR(AS-MBR)municipal wastewater treatment plant.When MLSS of the membrane tank was 12~15 g/L and membrane flux was 20 L/(m^(2)·h),the TMP of the V-MBR kept at 10~25 kPa stably and its average energy consumption was 0.042 kWh/m^(3),which was 61.8%lower than that of the AS-MBR.Under the precise aeration and recirculation control,the DO concentrations in the front and rear part of the aerobic tank of the V-MBR were lower than 0.5 mg/L and 0.3~1.2 mg/L,respectively.The nitrate concentrations in the rear part of the anoxic tank and in the anaerobic tank of the V-MBR were 2~3 mg/L and nearly 0 mg/L,respectively.The DO and nitrate environment conditions in the V-MBR favored the synthesis and utilization of intracellular carbon sources.The effects of denitrifying phosphorus removal and endogenous denitrification were significantly enhanced in the V-MBR with precise control.The ratio of the anoxic phosphorus uptake to the sum of the anoxic and the aerobic phosphorus uptake of the V-MBR was higher than 40%.The endogenous nitrogen removal in the post-anoxic tank of the V-MBR was 1~3 mg/L higher than that of the AS-MBR.The final TN concentration in the effluent of the VMBR was 3~6 mg/L lower than that of the AS-MBR.After adding sodium acetate in the anaerobic tank,the nitrogen and phosphorus removal effect of the V-MBR was further enhanced and the TN and TP concentrations in the effluent were lower than 5 mg/L and 0.5 mg/L,respectively.The comparative abundance of the nitrifiers,denitrifiers,DPAOs and DGAOs of the V-MBR were 0.76%,1.15%,1.96%and 0.58%higher than those of the AS-MBR,respectively.Dechloromonas and Candidatus Competibacter were the main DPAOs and DGAOs genus,respectively.

关 键 词：振动MBR 精确控制 反硝化除磷 内源反硝化 脱氮除磷 

分 类 号：X703.1[环境科学与工程—环境工程]