部分亚硝化/厌氧氨氧化耦合系统处理稀土氨氮废水脱氮性能  

Nitrogen Removal Performance of Rare Earth Ammonia Nitrogen Wastewater Treated by Partial Nitritation Anaerobic Ammonia Oxidation Coupling System

作　　者：李朝明 崔楠 郑伟楠 李芸 LI Chaoming;CUI Nan;ZHENG Weinan;LI Yun(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《有色金属（冶炼部分）》2023年第12期87-95,共9页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省重点研发计划项目(20202BBGL73086,20201BBG71012)。

摘　　要：构建了两级部分亚硝化(PN)厌氧氨氧化(ANAMMOX)耦合脱氮系统,研究了耦合系统处理稀土氨氮废水脱氮性能和微生物群落结构的变化,探讨了稀土元素对系统脱氮功能微生物活性的影响。结果表明,通过控制溶解氧能成功启动两级PN ANAMMOX反应器,当进水中稀土元素Y(Ⅲ)浓度大于10 mg L时,两级PN ANAMMOX耦合系统脱氮性能将逐步降低,停止添加Y(Ⅲ)后,其性能也不能恢复。同时短期试验表明,当Y(Ⅲ)浓度大于40 mg L时对AOB菌活性有抑制作用,当Y(Ⅲ)浓度大于20 mg L时对ANAMMOX菌活性有抑制作用,且抑制效果随着浓度的升高而增强。高通量测序技术表明,稀土元素Y(Ⅲ)冲击会降低系统中AOB菌(Nitrosomonas)及ANAMMOX菌(Candidatus_Kuenenia)丰度,且对Candidatus_Kuenenia的影响强于Nitrosomonas。A two-stage coupled nitrogen removal system of Partial Nitritation(PN)Anaerobic Ammonium Oxidation(ANAMMOX)was constructed.The nitrogen removal performance and microbial community structure of rare earth ammonia nitrogen wastewater treated by coupling system were studied.The effect of rare earth elements on the activity of functional microorganisms for nitrogen removal was investigated.The results show that the two-stage PN ANAMMOX reactor can be successfully started by controlling dissolved oxygen,When the concentration of rare earth element Y(Ⅲ)in the influent is more than 10 mg L,the nitrogen removal performance of the two-stage PN ANAMMOX coupling system will gradually decrease,the performance of Y(Ⅲ)cannot be restored after the addition of Y(Ⅲ)is stopped.At the same time,the short-term experiments show that when the concentration of Y(Ⅲ)is more than 40 mg L,the activity of AOB(Ammonia Oxidizing Bacteria)is inhibited.When the concentration of Y(Ⅲ)is more than 20 mg L,the activity of ANAMMOX is inhibited,and the inhibitory effect is enhanced with the increase of Y(Ⅲ)concentration.High-throughput sequencing indicates that the impact of rare earth element Y(Ⅲ)can decrease the abundance of AOB(Nitrosomonas)and ANAMMOX bacteria(Candidatus_Kuenenia),and the effect on Candidatus_Kuenenia is stronger than that of Nitrosomonas.

关 键 词：稀土废水 部分亚硝化 厌氧氨氧化 耦合系统 脱氮 

分 类 号：X52[环境科学与工程—环境工程]