NO_(2)^(-)-N/NH_(4)^(+)-N及COD/NH_(4)^(+)-N对厌氧氨氧化耦合反硝化脱氮除碳的影响  

Effect of NO_(2)^(-)N/NH_(4)^(+)-N and COD/NH_(4)^(+)-N on anaerobic ammonia oxidation coupled denitrification nitrogen and carbon removal

作　　者：赵鑫磊 邢嘉伟 付雪 毛佩玥 安芳娇 马娇 陈永志[1] ZHAO Xin-lei;XING Jia-wei;FU Xue;MAO Pei-yue;AN Fang-jiao;MA Jiao;CHEN Yong-zhi(School of Environmental and Municipal Engineering,Technical Center of Sewage Treatment Industry in Gansu,Key Laboratory of Yellow River Water Environment in Gansu,Lanzhou 730070,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃省污水处理行业技术中心,甘肃省黄河水环境重点实验室,甘肃兰州730070

出　　处：《中国环境科学》2021年第6期2586-2594,共9页China Environmental Science

基　　金：国家自然科学基金资助项目(51668033);甘肃省自然科学基金资助项目(18JR3RA126);甘肃省高等学校特色专业-环境工程项目(101004)。

摘　　要：采用序批式反应器-厌氧序批式反应器(SBR-ASBR)组合工艺处理常温低C/N比实际生活污水,通过调控SBR缺氧:好氧时间分别为80min:60min、120min:60min和150min:60min时,实现半亚硝化,将其出水直接泵入ASBR反应器中,考察不同进水NO_(2)^(-)-N/NH_(4)^(+)-N和COD/NH_(4)^(+)-N对厌氧氨氧化耦合反硝化同步脱氮除碳的影响,并采用响应面法设计正交批次试验.结果表明:在NO_(2)^(-)-N/NH_(4)^(+)-N为1.55,COD/NH_(4)^(+)-N为4.22时,出水NH_(4)^(+)-N、NO_(2)^(-)-N和COD的浓度分别为2.79,0.47,38.37mg/L,其去除率分别高达87.56%,98.45%和62.69%.ΔNO_(2)^(-)-N/ΔNH_(4)^(+)-N为2.23,生成的NO3--N的量比理论值小2.47mg/L,厌氧氨氧化和异养反硝化共同完成氮素去除,系统脱氮除碳性能最佳.当NO_(2)^(-)-N/NH_(4)^(+)-N和COD/NH_(4)^(+)-N分别由0.84增加到1.55和3.24增加到4.22时,厌氧氨氧化和异养反硝化对脱氮贡献率分别由80.40%降至53.33%和19.60%增加到46.67%.NO_(2)^(-)-N/NH_(4)^(+)-N和COD/NH_(4)^(+)-N对TN和COD去除的正交影响显著,均呈现正相关,R^(2)分别为0.9243和0.9700.The Sequencing Batch Reactor-Anaerobic Sequencing Batch Reactor(SBR-ASBR)combined process was used to treat actual domestic sewage with low C/N ratio at normal temperature,the partial nitritation was achieved by regulating SBR hypoxia:aerobic time was 80min:60min,120min:60min and 150min:60min respectively.Then the effluent was pumped into the ASBR reactor,investigate the effect of different influent NO_(2)^(-)N/NH_(4)^(+)-N and COD/NH_(4)^(+)-N on removal of nitrogen and carbon by anaerobic ammonia oxidation coupled denitrification,and response surface methodology was used to design orthogonal batch test.The results showed that:NO_(2)^(-)N/NH_(4)^(+)-N was 1.55 and COD/NH_(4)^(+)-N was 4.22,the effluent concentrations of NH_(4)^(+)-N,NO_(2)^(-)N and COD were 2.79,0.47 and 38.37mg/L respectively,and their removal rates were as high as 87.56%,98.45%and 62.69%respectively.ΔNO_(2)^(-)N/ΔNH_(4)^(+)-N was 2.23,the quantity of generated NO3--N was smaller than the theoretical value by 2.47mg/L,nitrogen was removed by the joint action of anammox and denitrifying,the nitrogen and carbon removal performance of the system was best.When NO_(2)^(-)N/NH_(4)^(+)-N and COD/NH_(4)^(+)-N increased from 0.84 to 1.55 and 3.24 to 4.22,respectively,the contribution of anammox and heterotrophic denitrification to nitrogen removal decreased from 80.40%to 53.33%and 19.60%increased to 46.67%.NO_(2)^(-)N/NH_(4)^(+)-N and COD/NH_(4)^(+)-N had significant interactive effects on the removal of TN and COD,and both showed a positive correlation,R^(2)were 0.9243 and 0.9700 respectively.

关 键 词：半亚硝化 缺氧 好氧比 厌氧氨氧化耦合反硝化 脱氮除碳 响应面法 

分 类 号：X703[环境科学与工程—环境工程]