新型除磷装置后置处理MBR出水的除磷研究  

Research on Phosphorus Removal of MBR Effluent by a New Type of Phosphorus Removal Device

作　　者：杨丽 桂明生 李再新 符宇航 杨平[2] YANG Li;GUI Mingsheng;LI Zaixin;FU Yuhang;YANG Ping(School of Chemistry and Environmental Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;College of Architecture and Environment,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川轻化工大学化学与环境工程学院,四川自贡643000 [2]四川大学建筑与环境学院,成都610065

出　　处：《四川轻化工大学学报（自然科学版）》2023年第5期10-15,共6页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川省科技厅科技计划项目(2022YFS0456);四川轻化工大学校级项目(2020RC11);乡村低成本环境治理技术四川省高校重点实验室开放基金项目(XCH2022ZB-09)。

摘　　要：生物除磷往往无法使出水总磷达标,常需要化学除磷强化生物除磷。通过研究设计了一款一体式连续流化学除磷装置,对限氧单级膜生物反应器(MBR)处理城市生活污水出水进行了后置除磷。该反应装置由反应区及沉淀区构成,沉淀区末端设滤料过滤。对后置连续流化学除磷工艺的优化控制进行研究,反应混凝时间为2 h,沉淀过滤时间为2 h,并对不同絮凝剂进行了筛选且对最佳絮凝剂剂量进行了研究。结果表明:最适絮磷剂为AlCl3,在Al/P比为1∶1时可以满足出水总磷浓度TP低于1 mg/L;当比例大于2.5∶1时,出水即可满足TP<0.5 mg/L。工艺出水TP可达GB 18918-2002《城镇污水处理厂污染物排放标准》一级A标准。Biological phosphorus removal often fails to reach the standard of total phosphorus in effluent,and chemical phosphorus removal is often needed to enhance biological phosphorus removal.An integrated continuous flow chemical phosphorus removal device has been studied and designed to explore post phosphorus removal in the treatment of urban sewage effluent by oxygen-limited single-stage membrane bioreactors(MBR).The reaction device is composed of a reaction zone and a precipitation zone,and the end of the precipitation zone is provided with a filter material for filtration.The optimal control of the post continuous flow chemical phosphorus removal process is studied,the reaction coagulation and the sedimentation filtration time is both 2 h.Furthermore,the experiments screen different flocculants and optimize the flocculant dosage.The results show that AlCl3 is the most suitable phosphorus removal agent.When the Al/P ratio is 1∶1,the total phosphorus(TP)in the effluent is less than 1 mg/L,and when the ratio is higher than 2.5∶1,the effluent can satisfy the TP<0.5 mg/L,whose process effluent TP can meet the primary standard A according to GB 18918-2002 named“Pollutant discharge standards for urban sewage treatment plants”.

关 键 词：连续流化学除磷装置 限氧单级膜生物反应器 城市污水 化学除磷 

分 类 号：X703[环境科学与工程—环境工程]