基于SBR-ABR实现PN-SAD耦合工艺的运行与优化调控  

Process Control and Operation Optimization of PN-SAD Coupling Process Based on SBR-ABR

作　　者：陈重军[1,2,3,4] 张敏 姜滢[1] 郭萌蕾[1] 谢嘉玮 谢军祥 沈耀良 CHEN Chong-jun;ZHANG Min;JIANG Ying;GUO Meng-lei;XIE Jia-wei;XIE Jun-xiang;SHEN Yao-liang(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou 215009,China;Jiangsu Provincial Key Laboratory of Environmental Science and Engineering,Suzhou 215009,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]江苏水处理技术与材料协同创新中心,苏州215009 [3]江苏省环境科学与工程重点实验室,苏州215009 [4]江苏省厌氧生物技术重点实验室,无锡214122

出　　处：《环境科学》2020年第1期330-336,共7页Environmental Science

基　　金：国家自然科学基金项目(51508366);江苏水处理技术与材料协同创新中心预研项目(XTCXSZ2019-3);江苏省环境科学与工程重点实验室开放基金项目(Zd1804);江苏省厌氧生物技术重点实验室开放基金项目(KFLAB201701)

摘　　要：采用序批式活性污泥反应器-厌氧折流板反应器(SBR-ABR)组合工艺,构建"部分亚硝化-厌氧氨氧化反硝化"(PNSAD)反应链实现深度脱氮除碳.设定3种不同的运行工况,工况Ⅰ将SBR出水(NO2--N/NH4+-N为1~1.32)直接接入单隔室ABR厌氧氨氧化系统,发现虽然实现了厌氧氨氧化反应的稳定运行,但联合工艺总氮(TN)去除率低于80%,出水TN约20mg·L-1.为在ABR内增加反硝化功能,向ABR反应器第三隔室添加反硝化污泥,于工况Ⅱ将SBR出水接入,发现耦合反应对TN去除率仍偏低若实现深度脱氮需在厌氧氨氧化后段补充碳源.故在工况Ⅲ调控SBR出水(NO2--N/NH4+-N=5)与部分原水混合(NO2--N/NH4+-N=1.4;C/N=2.5),接入单隔室ABR厌氧氨氧化反硝化系统不仅实现了厌氧氨氧化段基质的良好配比,也为反硝化提供了良好的有机碳源,整个工艺出水COD为50左右,TN在6以下,TN去除率达到95%.在SBR-ABR反应器内构建PN-SAD联合反应为废水深度脱氮除碳提供了理论基础.This study uses three different operating phases for a sequencing batch reactor(SBR) combined with an anaerobic baffled reactor(ABR) to determine the effect of deep nitrogen and carbon removal by the "partial nitrification-anaerobic ammonium oxidation combined denitrification"(termed PN-SAD) reaction.The effluent of the SBR(NO2-N/NH4+-N ratio range of 1-1.32) was accessed directly to the single compartment ABR anammox system in phase Ⅰ.The results showed that although the anammox reaction was stable,the combined process total nitrogen(TN) removal efficiency was <80%,and the TN concentration of effluent was^20 mg·L-1.In order to increase the denitrification function in the ABR,denitrifying sludge was added to the third compartment of the ABR in phase Ⅱ.We found that the TN removal efficiency of the coupling reaction was still low.An organic carbon source should be supplied in the latter stage of anammox if deep nitrogen removal is required.Therefore,in phase Ⅲ,the effluent of the SBR(NO2--N/NH4+-N ratio of^5) was mixed with the partial raw water(mixed water NO2--N/NH4+-N ratio of^1.4;C/N ratio of 2.5).The mixed water was connected to the single compartment of the ABR.The PN-SAD system not only achieved a good matrix ratio at the anammox stage,but also provided a good carbon source for denitrification.The chemical oxygen demand(COD) concentration of the effluent in the whole process was 50 mg·L 1,the TN concentration of the effluent was <6 mg·L 1,and the TN removal efficiency was95%.We conclude that the stable operation of the combined PN-SAD reaction provides the basis for deep nitrogen and carbon removal using the combined SBR-ABR process.

关 键 词：序批式活性污泥反应器-厌氧折流板反应器(SBR-ABR) 厌氧氨氧化 反硝化 贡献率 脱氮除碳 

分 类 号：X703.1[环境科学与工程—环境工程]