An efficient way to enhance the total nitrogen removal efficiency of the Anammox process by S^0-based short-cut autotrophic denitrification

作     者：Fangmin Chen Xiang Li Yan Yuan Yong Huang 

作者机构：School of Environmental Science and Engineering Suzhou University of Science and Technology National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2019年第31卷第7期

页      面：214-224页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Key Research and Development Programme of China(No.2016YFC 0401103) the National Natural Science Foundation of China(No.51408387) the Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment 

主　　题：Anammox Sulfur autotrophic denitrification with S0 as electron donor (S0-SADN) Coupling Enhanced nitrogen removal 

摘      要：In order to reduce the amount of NO_3^-–N generated by the Anammox process, and alleviate the competition between denitrification and Anammox for NO_2^-–N in a single reactor, the preference of S^0 for reacting with coexisting NO_2^-–N and NO_3^-–N in the sulfur autotrophic denitrifying(SADN) process and the coupling effect of short-cut SADN and the Anammox process were studied. The results showed that S^0 preferentially reacted with NO_3^-to produce NO_2^-–N, and then reacted with NO_2^-–N when NO_3^-–N was insufficient, which could effectively alleviate the competition between SADN bacteria(SADNB) and Anammox bacteria(An AOB) for NO_2^-–N. After 170 days of operation, coupling between short-cut S^0-SADN and the Anammox process was first successfully achieved. SADNB converted the NO_3^-–N generated by the Anammox process into NO_2^-–N, which was once again available to An AOB. The total nitrogen removal efficiency eventually stabilized at over 95%, and the effluent NO_3^-–N was controlled within 10 mg/L, when high NH_4^+–N wastewater was treated by the Anammox process. Microbial community analysis further showed that Candidatus Brocadia and Thiobacillus were the functional microorganisms for An AOB and SADNB.