OAAO-MBR工艺在市政污水处理厂提标改造中的应用  

Application of OAAO-MBR process for upgrading and reconstruction of municipal wastewater treatment plant

作　　者：赵凯宁 唐升引 邓岳鹏 张诗剑 杨锴 郭民 张锡辉 ZHAO Kaining;TANG Shengyin;DENG Yuepeng;ZHANG Shijian;YANG Kai;GUO Min;ZHANG Xihui(Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;Guangdong Guangye Equipment Manufacturing Group Co.,Ltd.,Guangzhou 510275,China;Zhangjiagang Water Co.,Ltd.,Suzhou 215600,China)

机构地区：[1]清华大学深圳国际研究生院,广东深圳518055 [2]广东省广业装备制造集团有限公司,广东广州510275 [3]张家港市给排水有限公司,江苏苏州215600

出　　处：《工业水处理》2025年第4期176-185,共10页Industrial Water Treatment

基　　金：广东省重点领域研发计划(2022B0111130001)。

摘　　要：针对太湖流域某全地下式市政污水处理厂改良型厌氧-缺氧-好氧-膜生物反应器(AAO-MBR)处理工艺存在的出水TN难以稳定达标的困境,采用基于DO和氧化还原电位(ORP)优化控制的兼氧-微氧-微氧-好氧-膜生物反应器(OAAO-MBR)工艺进行提标改造。通过对运行环境的合理调控,实现出水水质的稳定提升。研究结果表明,OAAO-MBR工艺的膜出水COD、NH_(4)^(+)-N、TN、TP分别控制在30、1.5、10、0.3 mg/L以内,均能满足苏州特别排放限值规定的出水水质。与改造前同期相比,OAAO-MBR工艺对脱氮的碳源消耗减少了33.16%。结合各处理单元氮污染物转化及微生物群落结构推测,Nitrospira和Ellin6067在微氧Ⅰ区起短程硝化作用,Nitrospira与Nitrosomonas在好氧区起硝化作用;反硝化反应广泛存在于各处理单元中,其中Bacillus作为典型好氧反硝化菌在好氧区发挥重要作用。Aiming at the dilemma of the difficulty in meeting the standard of effluent TN stably in a modified anaerobic-anoxic-aerobic-membrane bioreactor(AAO-MBR)treatment process of an all-underground municipal wastewater treatment plant in Taihu Basin,this research employed the oxic-anoxic-anaerobic-oxic-membrane bio-reactor(OAAO-MBR)process based on optimal control of DO and ORP for upgrading and reconstruction.By appro-priate regulation of the operating environment,stable improvement of effluent wastewater quality was achieved.Our research showed that the effluent COD,NH_(4)^(+)-N,TN and TP of the OAAO-MBR process were controlled within 30,1.5,10 and 0.3 mg/L,respectively,which could meet the effluent quality of Suzhou special discharge limit value.Compared with the same period before upgrading and reconstruction,the carbon source consumption for nitrogen re-moval by OAAO-MBR process was reduced by 33.16%.Combined with the transformation of nitrogen pollutants and microbial community structure in each treatment unit,it was speculated that Nitrospira and Ellin 6067 played the role of short-range nitrification in anoxicⅠzone,while Nitrospira and Nitrosomonas played a role of nitrification in aerobic zone.Denitrification was widely observed in each treatment unit,specifically,Bacillus played an impor-tant role in aerobic zone as a typical aerobic denitrifying bacterium.

关 键 词：市政污水处理厂 提标改造 OAAO-MBR工艺 ORP控制 脱氮机制 

分 类 号：X703[环境科学与工程—环境工程]