摘要
采用厌氧/缺氧/好氧-曝气生物滤池(A^(2)/O-BAF)工艺处理低C/N城市污水,研究硝化液回流比为0、50%、100%、150%和200%时该工艺脱氮除磷效能。结果表明,在A^(2)/O中控制污泥龄(SRT)为15d,水力停留时间(HRT)为10h,好氧段溶解氧(DO)为2.0mg/L;BAF中控制HRT为3h、好氧/缺氧曝停时间比为50min∶10min以及硝化液回流比R=200%的条件下,进水COD、TN、NH_(4)^(+)-N和PO_(4)^(3-)-P的浓度分别为232.61mg/L、53.99mg/L、52.20mg/L和5.54mg/L,系统出水中COD、TN、NH_(4)^(+)-N和PO_(4)^(3-)-P的浓度分别为34.11mg/L、12.44mg/L、1.01mg/L和0.34mg/L,亚硝积累率(Ni AR)高达95.20%。出水NO_(2)^(-)-N回流至A^(2)/O缺氧段后,缺氧段出水的PO_(4)^(3-)-P含量下降至2.68mg/L,反硝化除磷(DPR)对系统PO_(4)^(3-)-P的去除贡献达75.42%。批次试验表明,A^(2)/O反应器中的除磷菌在厌氧120min后释磷量达到36.35mg/L,缺氧条件下以NO_(2)^(-)-N为电子受体的反应中吸磷量为26.28mg/L,吸磷率为72.30%,以NO_(2)^(-)-N为电子受体的反硝化除磷菌(DPB)占总除磷菌的72.91%。
The anaerobic/anoxic/aerobic-aerated biological filter (A^(2)/O-BAF) process was used to treat low-C/N municipal sewage,the nitrogen and phosphorus removal efficiency of the process was studied when the reflux ratio of nitrification solution was 0,50%,100%,150%and 200%.The results showed that when A^(2)/O operated with the sludge retention time (SRT) being 15d,the hydraulic retention time (HRT)being 10h,and the dissolved oxygen (DO) in the aerobic stage being 2.0mg/L,BAF operated under the conditions of HRT of 3h,aerobic/anoxic exposure time ratio of 50min∶10min,and nitrification solution reflux ratio R of 200%,and the concentrations of COD,TN,NH_(4)^(+)-N and PO_(4)^(3-)-P in the influent were 232.61mg/L,53.99mg/L,52.20mg/L and 5.54mg/L,respectively,the concentrations of COD,TN,NH_(4)^(+)-N and PO_(4)^(3-)-P in the effluent of the system were 34.11mg/L,12.44mg/L,1.01mg/L and 0.34mg/L,respectively,and the nitrite accumulation rate (Ni AR) was as high as 95.20%.After the effluent NO_(2)^(-)-N returned to the A^(2)/O anoxic section,the PO_(4)^(3-)-P content of the effluent in the anoxic section dropped to2.68mg/L,denitrifying phosphorus removal (DPR) contributed 75.42%to the removal of PO_(4)^(3-)-P in the system.Batch tests showed that the phosphorus release of phosphorus removal bacteria in A^(2)/O reactor reached 36.35mg/L after anaerobic treatment for 120min.Under anoxic conditions,the amount of phosphorus absorbed in the reaction with NO_(2)^(-)-N as electron acceptor was 26.28mg/L,and the phosphorus absorption rate was 72.30%.Denitrifying phosphorus removal bacteria (DPB) with NO_(2)^(-)-N as electron acceptor accounted for 72.91%of the total phosphorus removal bacteria.
作者
吴新波
党鸿钟
马娇
严渊
曾天续
李维维
张国珍
陈永志
WU Xinbo;DANG Hongzhong;MA Jiao;YAN Yuan;ZENG Tianxu;LI Weiwei;ZHANG Guozhen;CHEN Yongzhi(Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,Gansu,China;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China;Technical Center of Sewage Treatment Industry in Gansu Province,Lanzhou 730070,Gansu,China;Gansu Research Institute of Light Industry Co.,Ltd.,Lanzhou 730070,Gansu,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2023年第2期1089-1097,共9页
Chemical Industry and Engineering Progress
基金
兰州交通大学甘肃省黄河水环境重点实验室开放课题(20JR2RA002)
兰州交通大学天佑创新团队项目(TY202005)
甘肃省高等学校产业支撑计划(2020C-38)
甘肃省青年科技基金计划(20JR5RA075)。
关键词
厌氧/缺氧/好氧-曝气生物滤池
短程硝化
反硝化除磷
硝化液回流比
脱氮除磷
anaerobic/anoxic/oxic-biological aerated filter(A~2/O-BAF)
short-cut nitrification
denitrifying phosphorus removal(DPR)
reflux ratio of nitrifying liquid
denitrification and phosphorus removal
