氮负荷波动对厌氧氨氧化/反硝化协同脱氮效能影响  

Effect of nitrogen load fluctuation on the synergistic denitrification efficiency of anammox/denitrification

作　　者：王弄潮 王建芳[1,2,3] 骆子琛 胡俊彤 WANG Nongchao;WANG Jianfang;LUO Zichen;HU Juntong(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,Suzhou 215009,China;Collaborative Innovation Center of Water Treatment Technology and Materials in Jiangsu Universities,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]城市生活污水资源化利用技术国家地方联合工程实验室,江苏苏州215009 [3]江苏高校水处理技术与材料协同创新中心,江苏苏州215009

出　　处：《工业水处理》2023年第1期68-75,共8页Industrial Water Treatment

基　　金：国家自然科学基金项目(51878430)。

摘　　要：在厌氧折流板反应器(ABR)中探究厌氧氨氧化菌和异养反硝化菌的分步培养,以及进水氮负荷波动对系统性能的影响。结果表明,维持C/N为0.65,逐步提升总氮负荷(NLR),50 d左右可实现厌氧氨氧化与反硝化协同脱氮,总氮去除率可达95.8%。NLR波动值低于1.04 kg/(m^(3)·d)时,对工艺脱氮性能无显著影响。负荷变化幅度越大,厌氧氨氧化菌活性受抑制越显著,对反硝化菌基本无影响,负荷波动值达到2.10 kg/(m^(3)·d)时厌氧氨氧化对氮的去除贡献(CA)下降至54.8%,反硝化耦合厌氧氨氧化协同脱氮可有效提升系统的稳定性。胞外聚合物(EPS)对系统负荷波动有较好的响应规律,负荷波动越大,EPS提高越多,有利于提高系统性能的稳定性。The effects of stepwise cultivation of anammox bacteria and heterotrophic denitrifying bacteria,and fluctuations in influent nitrogen load on system performance were investigated in an anaerobic baffled reactor.The results showed that the synergistic denitrification of anammox and denitrification could be achieved in about 50 days by maintaining C/N 0.65 and increase the load gradually,and the total nitrogen removal rate could reach 95.8%.Fluctuations in the total nitrogen load below 1.04 kg/(m^(3)·d) had no significant effect on the process denitrification performance.The larger the load variation,the more significant the inhibition of the activity of anammox bacteria,but basically no effect on denitrification bacteria.The lowest contribution of anammox to nitrogen removal decreased to 54.8%when the load fluctuation value reached 2.10 kg/(m^(3)·d).Denitrification coupled with anammox synergistic denitrification can effectively improve the stability of the system.The extracellular polymeric substances have a good response pattern to the system load shock,the greater the load fluctuation,the more EPS,which is conducive to improving the stability of the system performance.

关 键 词：厌氧氨氧化 反硝化 负荷波动 微生物活性 胞外聚合物 

分 类 号：X703.1[环境科学与工程—环境工程]