S/N对硫自养反硝化耦合厌氧氨氧化反应氮素转化的影响  

Effect of S/N on nitrogen transformation in sulfur autotrophic denitrification coupled anaerobic ammonium oxidation reaction

作　　者：李寓哲 顾晓丹 黄勇[1,2] LI Yuzhe;GU Xiaodan;HUANG Yong(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Institute of Environmental Biology,Suzhou University of Science and Technology,Suzhou 215009,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]苏州科技大学环境生物研究所,苏州215009

出　　处：《环境工程学报》2024年第7期1783-1791,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金重点资助项目(51938010)。

摘　　要：S^(0)基硫自养反硝化耦合厌氧氨氧化(sulfur autotrophic denitrification anammox,S^(0)ADN-Anammox)工艺中普遍存在S/N较高问题,从而造成S^(0)的浪费。为此,通过批次实验,在不考虑S^(0)流失条件下,优化了以S^(0)为电子供体的系统中适宜的S/N,并通过底物控制策略,模拟S^(0)ADN前半程完全反应,仅存在后半程与Anammox的系统环境,讨论在不同S^(0)存在的情况下S^(0)ADN后半程和Anammox对NO_(2)^(-)-N的竞争能力。结果表明,在不同的S^(0)投加量条件下,S^(0)ADN-Anammox系统会表现出不同的脱氮性能,当S/N=1,S^(0)ADN-Anammox系统总氮去除率较高,达89%,其中NH_(4)^(+)-N和NO_(3)^(-)-N的去除率分别为77%和100%;当只存在NO_(2)^(-)-N和NH_(4)^(+)-N时,S^(0)质量浓度越高,Anammox可获得的NO_(2)^(-)-N越少,S^(0)ADN后半程对NO_(2)^(-)-N的竞争能力要强于Anammox,过高的S/N会影响NH_(4)^(+)-N去除效果。There is a common problem of high S/N in the S^(0)-based sulfur autotrophic denitrification coupled anaerobic ammonium oxidation(sulfur autotrophic denitrification anammox,S^(0)ADN-Anammox)process,resulting in the waste of S^(0).Thus,batch experiments were conducted to optimize the appropriate S/N in the sulfur autotrophic denitrification coupled anaerobic ammonium oxidation system when S^(0) was taken as the electron donor without considering the loss of S^(0).And the first half stage of the complete reaction of S^(0)ADN was simulated through the substrate control strategy,then in the system environment of the second half stage of S^(0)ADN and Anammox,their competitive ability for NO_(2)^(-)-N in the presence of different S^(0) was discussed.The results showed that the S^(0)ADN-Anammox system had a different denitrification performance at different S^(0)dosage.When S/N=1,the total nitrogen removal rate of the S^(0)ADN-Anammox system was high and reached89%,of which the removal rates of NH_(4)^(+)-N and NO_(3)^(-)-N were 77%and 100%,respectively;when only NO_(2)^(-)-N and NH_(4)^(+)-N existed,the higher the S^(0) mass concentration,the less NO_(2)^(-)-N available to Anammox,and the competitive ability for NO_(2)^(-)-N in the second half of S^(0)ADN was stronger than Anammox,and too high S/N could affect the NH_(4)^(+)-N removal effect.

关 键 词：硫自养反硝化耦合厌氧氨氧化 S/N的影响 底物竞争关系 

分 类 号：X703[环境科学与工程—环境工程]