AOA-MBR处理高盐榨菜废水厌氧膜生物反应器出水的效能  

Operation performance of an AOA-MBR treating the effluent from an anaerobic membrane bioreactor dealing with high-salt mustard tuber wastewater

作　　者：肖小兰[1,2] 亓金鹏 刘皓 晏习鹏 阮文权 XIAO Xiaolan;QI Jinpeng;LIU Hao;YAN Xipeng;RUAN Wenquan(School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China)

机构地区：[1]江南大学环境与土木工程学院,无锡214122 [2]江苏省厌氧生物技术重点实验室,无锡214122

出　　处：《环境工程学报》2021年第9期3057-3066,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21506076,51678279);江苏省社会发展-面上项目(BE2020755);典型行业高盐有机废水高效处理及资源化成套技术集成与示范(2021YFC2102205);中央高校基本科研业务费专项资金资助(JUSRP52017B,JUSRP52030A);国家重点研发计划绿色生物制造专项(2021YFC2102200)

摘　　要：为了解决高盐榨菜废水厌氧膜生物反应器出水的处理问题,考察了缺氧/好氧/缺氧-膜生物反应器(anacrobic/oxic/anacrobic-membrane bioreactor,AOA-MBR)在不同水力停留时间(hydraulic retention time,HRT)下对高盐榨菜废水厌氧膜生物反应器出水的处理效果,并通过调整硝化液回流比(nitrification liquid reflux ratio,Ro)优化了反应器的运行参数。在进水COD值为3200 mg·L^(−1)、氨氮为400 mg·L^(−1)、盐度为35 g·L^(−1)、溶解氧(dissolved oxygen,DO)浓度为2~4 mg·L^(−1)、温度为25℃左右的条件下,AOA-MBR的最佳运行工况为HRT=4 d、Ro=200%。在此工况下,AOA-MBR的COD去除率为85.4%、氨氮去除率为96.4%,总氮去除率为89.1%。此外,仅依靠AOA-MBR无法实现出水总磷的达标排放,还需要与化学除磷相结合。在运行过程中,污泥浓度在初始高盐冲击下会出现短暂下降现象,随后在逐渐适应了高盐环境后再缓慢上升。长期的高盐环境驯化使体系内可溶性微生物产物(soluble microbial products,SMP)和胞外聚合物(boud extracellular polymeric substances,BEPS)的质量浓度由5.1 mg·g^(−1)和36.9 mg·g^(−1)(以MLVSS计)上升到18.3 mg·g^(−1)和62.5 mg·g^(−1),这可能有利于微生物在高盐环境下的生存。在AOA-MBR的运行过程中,膜组件共进行了5次清洗,而物理清洗+化学清洗的组合清洗方式对于膜污染有更好的清洗效果。The treatment efficiency of the effluent from an anaerobic membrane bioreactor(AnMBR)dealing with high-salt mustard tuber wastewater by the anacrobic/oxic/anacrobic-membrane bioreactor(AOA-MBR)was investigated under different hydraulic retention time(HRT),and the operation parameters of the reactor were optimized by adjusting the Nitrification Liquid Reflux Ratio(Ro).When the influent COD was 3200 mg·L^(−1),ammonia nitrogen was 400 mg·L^(−1),salinity was 35 g·L^(−1),dissolved oxygen(DO)concentration was 2~4 mg·L^(−1),temperature was 25℃,the optimal operation parameters of AOA-MBR were HRT=4 d and Ro=200%。Under this condition,the removal efficiencies of COD,ammonia nitrogen and total nitrogen by AOA-MBR were 85.4%,96.4%and 89.1%,respectively.Furthermore,total phosphorus of the effluent could not meet the harge standard only by AOA-MBR.Thus,it was suggested to add a step of chemical phosphorus removal.During the operation period,the sludge concentration decreased briefly due to the impact of high salinity at the initial period and then gradually increased with the microbe adapting to the high salinity environment.After long-term acclimation,the concentrations of SMP and BEPS increased from 5.1 mg·g^(−1) and 36.9 mg·g^(−1) to 18.3 mg·g^(−1) and 62.5 mg·g^(−1),respectively,which may be beneficial to the survival of microorganisms in high salt environment.During the operation of AOA-MBR,the membrane modules were cleaned five times,and the physical and chemical combination cleaning could achieve better cleaning effect of membrane fouling.

关 键 词：缺氧/好氧/缺氧-好氧膜生物反应器 污水处理 高盐废水 污泥性质 

分 类 号：X703.1[环境科学与工程—环境工程]