部分亚硝化-厌氧氨氧化协同反硝化处理生活污水脱氮除碳  

Partial Nitritation and Anaerobic Ammonia Oxidation Synergistic Denitrification to Remove Nitrogen and Carbon from Domestic Sewage

作　　者：秦彦荣 袁忠玲 张明 张民安 刘安迪 付雪 马娟[1,2,3] 陈永志 QIN Yan-rong;YUAN Zhong-ling;ZHANG Ming;ZHANG Min-an;LIU An-di;FU Xue;MA Juan;CHEN Yong-zhi(School of Environment and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,China;Technical Center of Sewage Treatment Industry in Gansu,Lanzhou 730070,China)

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070 [2]甘肃省黄河水环境重点实验室,兰州730070 [3]甘肃省污水处理行业技术中心,兰州730070

出　　处：《环境科学》2021年第10期4853-4863,共11页Environmental Science

基　　金：国家自然科学基金项目(51668033);甘肃省自然科学基金项目(18JR3RA126);甘肃省高等学校特色专业⁃环境工程项目(101004);甘肃省高等学校产业支撑计划项目(2020C⁃38);兰州交通大学天佑创新团队项目(TY202005)。

摘　　要：采用SBR-ASBR组合工艺处理实际生活污水,SBR中考察缺氧/好氧时间比及温度对部分亚硝化(partial nitritation,PN)的作用,ASBR中研究COD/NO_(2)^(-)-N(C/N)对厌氧氨氧化(anaerobic ammonium oxidation,ANAMMOX)协同反硝化脱氮除碳的影响.(1)控制温度为25℃,在缺氧/好氧时间比为30 min∶30 min,单周期交替3次时,NO_(2)^(-)-N积累率(NiAR)于第22 d为98.06%,比亚硝态氮产生速率(SNiPR,以N/VSS计)为0.28 g·(g·d)^(-1),同步硝化反硝化去除的TN和COD分别为12.29mg·L^(-1)和110.36 mg·L^(-1).(2)在缺氧/好氧时间比为30 min∶30 min下,温度为15℃时,丝状菌大量繁殖,污泥活性和沉降性变差;温度为30℃时,NH_(4)^(+)-N转化为NO_(2)^(-)-N比例为86.83%,造成出水NH_(4)^(+)-N浓度过低,不能为厌氧氨氧化提供合适基质浓度;温度为25℃时,出水NH_(4)^(+)-N和NO_(2)^(-)-N浓度分别为31.58 mg·L^(-1)和35.04 mg·L^(-1),匹配厌氧氨氧化基质比.(3)组合工艺脱氮性能良好,出水TN、NH_(4)^(+)-N和COD浓度分别稳定在13.13、4.83和69.96 mg·L^(-1),去除率分别为83.10%、93.64%和75.11%.调节ASBR进水C/N为2.5、2.0和1.5时,C/N为2.0时厌氧氨氧化协同反硝化脱氮除碳性能最佳,出水NH_(4)^(+)-N、NO_(2)^(-)-N、NO_(3)^(-)-N和COD分别为0.09、0.25、1.04和32.73 mg·L^(-1).A sequencing batch reactor-anaerobic sequencing batch reactor(SBR-ASBR)process was used to treat domestic sewage.In the SBR,the effects of the anoxic/aerobic time ratio and temperature on the realization of partial nitritation(PN)were investigated.In the ASBR,the effects of different COD/NO_(2)^(-)-N(C/N)ratios on the removal of nitrogen and carbon using anaerobic ammonia oxidation(ANAMMOX)and denitrification were studied.The results illustrated that:(1)After three single cycles and on the 22nd day,the NO_(2)^(-)-N accumulation rate(NiAR)was 98.06%,and the nitrate nitrogen generation rate(SNiPR,calculated as N/VSS)was 0.28 g·(g·d)^(-1),and simultaneous nitrification and denitrification removal the TN and COD were 12.29 and 110.36 mg·L^(-1),respectively(temperature=25℃,anoxic/aerobic time ratio=30 min:30 min).(2)At an anoxic/aerobic time ratio of 30 min:30 min,the filamentous sludge bulked,the sludge activity decreased,and sludge settleability was poor at 15℃.Furthermore,the conversion rate of NH_(4)^(+)-N to NO_(2)^(-)-N was 86.83%,indicating that the effluent NH_(4)^(+)-N concentration was too low to provide suitable matrix concentrations for ANAMMOX at 300 C.The effluent concentrations of NH_(4)^(+)-N and NO_(2)^(-)-N were 31.58 mg·L^(-1)and 35.04 mg·L^(-1),respectively,matching the ratio of the ANAMMOX substrate at 25℃.(3)The SBR-ASBR combined process showed good denitrification performance;the effluent TN,NH_(4)^(+)-N,and COD concentrations were stable at 13.13,4.83,and 69.96 mg·L^(-1),respectively,and the removal rates were 83.10%,93.64%,and 75.11%,respectively.When the influent C/N of the ASBR was 2.5,2.0,and1.5,respectively,anaerobic ammonia oxidation and denitrification showed the best performance with respect to nitrogen and carbon removal with a C/N of 2.0.The effluent NH_(4)^(+)-N,NO_(2)^(-)-N,NO_(3)^(-)-N,and COD were 0.09,0.25,1.04,and 32.73 mg·L^(-1),respectively.

关 键 词：间歇曝气 温度 部分亚硝化 厌氧氨氧化(ANAMMOX) 反硝化 C/N 

分 类 号：X703􀆰[环境科学与工程—环境工程]