厌氧膜生物反应器耦联部分亚硝化/厌氧氨氧化用于污水处理研究  

Study on characteristics of coupled anaerobic membrane bioreactor and PN/A in domestic wastewater treatment

作　　者：王连旭 侯朝阳 王俊[1] 雷振[1] 李倩[1] 陈荣[1] WANG Lianxu;HOU Chaoyang;WANG Jun;LEI Zhen;LI Qian;CHEN Rong(Xi'an University of Architecture and Technology,Xi'an 710055)

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《环境科学学报》2021年第6期2092-2098,共7页Acta Scientiae Circumstantiae

基　　金：国家重点研发计划(No.2017YFE0127300);陕西省重点研发计划国际合作项目(No.2018KWZ-06);陕西省创新团队项目(No.2019TD-025)。

摘　　要：本研究构建了厌氧膜生物反应器(AnMBR)-部分亚硝化/厌氧氨氧化(PN/Anammox)污水处理工艺,以探究AnMBR-PN/A工艺处理效果最佳的水力停留时间(HRT).AnMBR将厌氧生物处理与膜分离技术相结合实现有机物去除,AnMBR出水NH^(+)_(4)-N通过PN部分转化为NO^(-)_(2)-N,最终通过NO^(-)_(2)-N氧化剩余NH^(+)_(4)-N去除.实验结果表明:在HRT=11.2 h时,AnMBR-PN/A工艺化学需氧量(COD)去除率稳定在97%以上,COD转化为CH_4效率超过77.5%,总氮(TN)去除率为78%,出水COD和TN浓度分别低于14和11 mg·L^(-1).AnMBR段COD去除率达到95%,平均甲烷产率为0.39 L·L^(-1)·d^(-1).PN段实现了NO^(-)_(2)-N的高效积累,其出水中NO^(-)_(2)/NH^(+)_(4)为0.91±0.11.Anammox段出水中的NO^(-)_(2)-N、NH^(+)_(4)-N和NO^(-)_(3)-N浓度分别低于1.0、4.9和5.1 mg·L^(-1).高通量测序结果表明PN段氨氧化菌主要为Nitrosomonas,丰度为7.09%,Anammox段主要微生物为Candidatus Brocadia,丰度高达21.01%.本研究构建的AnMBR-PN/A工艺实现了污水处理过程的高效能源回收和深度自养脱氮,研究成果为工程应用提供了理论支撑.An anaerobic membrane bioreactor(AnMBR)-partial nitritation/anaerobic ammonia oxidation(PN/Anammox)system was built in this study to investigate the optimal hydraulic retention time(HRT)for system operation.The AnMBR combines anaerobic biological treatment and membrane separation to realize organics removal;NH^(+)_(4)-N was partially transformed into NO^(-)_(2)-N through PN,then residual NH^(+)_(4)-N was oxidized by NO^(-)_(2)-N to remove nitrogen.At an HRT of 11.2 h,chemical oxygen demand(COD)removal efficiency of over 97%was achieved for the coupled system,with 77.5%of the influent COD was recovered as CH4;a total nitrogen(TN)removal rate of was 78%by the PN/A,with the effluent COD and TN concentrations lower than 14 and 11 mg·L^(-1),respectively.The AnMBR reached a total COD removal efficiency of 95%,and the average methane production rate reached 0.39 L·L^(-1)·d^(-1).PN achieved efficient accumulation of NO^(-)_(2)-N,and the NO^(-)_(2)/NH^(+)_(4) in effluent was 0.91±0.11.NO^(-)_(2)-N,NH^(+)_(4)-N and NO^(-)_(3)-N concentrations in the effluent of Anammox reactor were lower than 1.0,4.9 and 5.1 mg·L^(-1),respectively.High-throughput sequencing analysis results indicated that ammonia-oxidizing bacteria in the PN reactor was mainly Nitrosomonas(7.09%),while the predominant bacteria in the Anammox reactor was Candidatus Brocadia(21.01%).The AnMBR-PN/A system built in this study realized efficient energy recovery and enhanced nitrogen removal,which provides theoretical basis for the future engineering application of this technology.

关 键 词：厌氧膜生物反应器 厌氧氨氧化 甲烷回收 自养脱氮 

分 类 号：X703[环境科学与工程—环境工程]