单质硫自养短程反硝化耦合厌氧氨氧化强化脱氮  

Improved on Nitrogen Removal of Anaerobic Ammonia Oxidation by Coupling Element Sulfur-based Autotrophic Short-cut Denitrification

作　　者：方文烨 李祥[1,2] 黄勇[1,2] 郭超然 胡羽婷 陶仁杰 FANG Wen-ye;LI Xiang;HUANG Yong;GUO Chao-ran;HU Yu-ting;TAO Ren-jie(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Institute of Environmental Biotechnology,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技术研究所,苏州215009

出　　处：《环境科学》2020年第8期3699-3706,共8页Environmental Science

基　　金：国家研发计划项目(2016YFC0401103);国家自然科学基金项目(51938010);江苏省水处理技术与材料协同创新中心项目。

摘　　要：通过在厌氧氨氧化(ANAMMOX)连续流反应器中添加单质硫,试图引入单质硫自养短程反硝化(short-cut S0-SADN)来强化ANAMMOX过程中NO^-3-N的去除.在温度为(33±2)℃,pH为7.8~8.2条件下,探讨不同的进水NH^+4-N/NO^-2-N比对耦合系统中氮素转化以及NO^-2-N竞争特性的影响.结果表明,在不同的进水NH^+4-N/NO^-2-N比(1∶1.3、1∶1.5、1∶1和1∶1.1)下,耦合系统的TN平均去除率分别达到了96.78%、97.21%、94.68%和97.72%,均远远大于ANAMMOX理论TN最高去除率89%.其中,在进水NH^+4-N/NO^-2-N比为1∶1或1∶1.1条件下,耦合系统能够实现单质硫自养短程反硝化耦合ANAMMOX深度脱氮的稳定运行.在最佳进水NH^+4-N/NO^-2-N比1∶1.1、NH^+4-N和NO^-2-N浓度分别为240mg·L^-1和265mg·L^-1条件下,TN去除速率达到1.50kg·(m^3·d)^-1,ANAMMOX和S0-SADN途径的TN去除率分别稳定在(95.68±1.22)%和(2.04±0.77)%.在整个运行过程中,ANAMMOX在底物NO^-2-N的竞争过程中一直占据着绝对的优势,ANAMMOX菌的活性(以NH^+4-N/VSS计)稳定在(0.166±0.008)kg·(kg·d)^-1.In order to enhance the removal of NO^-3-N in the ANAMMOX process,an element sulfur-based autotrophic short-cut denitrification(short-cut S0-SADN)was introduced by adding elemental sulfur to an ANAMMOX continuous flow reactor.The effects of different influent NH^+4-N/NO^-2-N ratios on the nitrogen conversion and NO^-2-N competitive characteristics in the coupled system were investigated at(33±2)℃and a pH of 7.8-8.2.The results showed that under different influent NH^+4-N/NO^-2-N ratios(1∶1.3,1∶1.5,1∶1,and 1∶1.1),the average total nitrogen(TN)removal efficiency of the coupled system reached 96.78%,97.21%,94.68%,and 97.72%,respectively,which were much higher than the highest TN removal efficiency of the ANAMMOX theory(89%).Among them,the stable operation of deep nitrogen removal of the short-cut S0-SADN coupled with ANAMMOX was successfully achieved with an influent NH^+4-N/NO^-2-N ratio of 1∶1 or 1∶1.1.Under the optimal influent NH^+4-N/NO^-2-N ratio of 1∶1.1,the concentrations of influent NH^+4-N and NO^-2-N were 240 mg·L^-1 and 265 mg·L^-1,respectively,the TN removal rate reached 1.50 kg·(m3·d)^-1,and the TN removal efficiency of ANAMMOX and S0-SADN pathways were stable at(95.68±1.22)%and(2.04±0.77)%,respectively.During the entire operational process,ANAMMOX always occupied an absolute advantage in the competition of substrate NO^-2-N,and the activity of ANAMMOX bacteria(NH^+4-N/VSS)was stable at(0.166±0.008)kg·(kg·d)^-1.

关 键 词：单质硫自养短程反硝化(short-cut S^0-SADN) 厌氧氨氧化(ANAMMOX) 深度脱氮 进水NH4^+4-N/NO2^--N比 竞争 

分 类 号：X703.1[环境科学与工程—环境工程]