一段式短程反硝化耦合厌氧氨氧化工艺处理厌氧膜生物反应器出水  

Treatment of effluent from anaerobic membrane bioreactor by one-stage partial denitrification coupled with an am mox

作　　者：薛晶晶 雷振[1,2] 王俊 陈荣 XUE Jingjing;LEI Zhen;WANG Jun;CHEN Rong(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Northwest Water Resource,Environment and Ecology,Ministry of Education,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西北水资源与环境生态教育部重点实验室,西安710055

出　　处：《环境工程学报》2022年第3期788-797,共10页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划项目(2017YFE0127300);陕西省重点研发计划国际合作项目(2018KWZ-06);陕西省创新团队项目(2019TD-025)。

摘　　要：采用移动床生物膜反应器,通过一段式短程硝化-厌氧氨氧化耦合短程反硝化工艺处理主流厌氧消化出水。在溶解氧浓度(DO)维持在(1.45±0.15)mg·L^(−1)的条件下,出水TN低至(10.7±2.4)mg·L^(−1)、NH_(4)^(+)-N转化率达到(86.8±4.5)%,平均TN去除率为(78.9±4.9)%(最高达84.0%)、TN去除负荷为0.38 kg·(m^(3)·d)^(−1)。分析氮的去除路径表明,低浓度有机物诱导反硝化菌主要发生短程反硝化,耦合系统脱氮贡献主要来源于厌氧氨氧化。在载体上,生物膜实现了厌氧氨氧化菌的有效富集,其中菌的活性为873.9 mg·(g·d)^(−1);而氨氧化细菌主要存在于絮体污泥中,占总菌比例为(38.7±5.9)%;亚硝酸盐氧化细菌则仅占(7.8±2.8)%,说明其受到一定程度抑制。本研究结果可为anammox在主流厌氧消化出水深度处理中的应用提供参考。In this study,the mainstream anaerobic digestion effluent was treated through integrated partial denitrification with one-stage partial nitrification-anaerobic ammonium oxidation in a moving-bed biofilm reactor.When the concentration of dissolved oxygen(DO)remained at(1.45±0.15)mg·L^(-1),the total nitrogen(TN)concentration in the effluent was as low as(10.7±2.4)mg·L^(-1),and the NH_(4)^(+)-N conversion rate reached(86.8±4.5)%.The average TN removal efficiency reached(86.8±4.5)%(up to 84.0%),and the TN removal load was 0.38 kg·(m^(3)·d)^(-1).Nitrogen removal pathway analysis revealed that partial denitrification was induced by the low organic concentration,and nitrogen removal of coupling system was mainly contributed by anaerobic ammonium oxidation.The biofilm could effectively enrich anammox bacteria on the carrier,and the activity of the bacteria was 873.9 mg·(g·d)^(-1),while ammonia-oxidizing bacteria mainly existed in sludge flocs,accounting for(38.7±5.9)% of the total bacteria.Nitrite oxidizing bacteria(NOB)only accounted for(7.8±2.8)%,indicating that they were suppressed in the system.The results of this study can provide a reference for the application of anammox in mainstream anaerobic digestion effluent treatment.

关 键 词：厌氧消化出水 厌氧氨氧化 短程反硝化 中高溶解氧 

分 类 号：X703[环境科学与工程—环境工程]