Removal of ammonium and nitrate through Anammox and FeS-driven autotrophic denitrification  

作　　者：Yanfei Wang Xiaona Zheng Guangxue Wu Yuntao Guan 

机构地区：[1]Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [2]State Environmental Protection Key Laboratory of Microorganism Application and Risk Control,School of Environment,Tsinghua University,Beijing 100084,China [3]Civil Engineering,School of Engineering,College of Science and Engineering,National University of Ireland,Galway,Galway H91 TK33,Ireland

出　　处：《Frontiers of Environmental Science & Engineering》2023年第6期127-139,共13页环境科学与工程前沿（英文）

基　　金：This study was supported by the Guangxi Key R&D Program(No.2021AB25056);the Shenzhen Key Scientific and Technological Project(No.JSGG20191129094410446).

摘　　要：An autotrophic denitrifying bioreactor with iron sulfide(FeS)as the electron donor was operated to remove ammonium(NH_(4)^(+))and nitrate(NO_(3)^(-))synergistically from wastewater for more than 298 d.The concentration of FeS greatly affected the removal of NH_(4)^(+)/NO_(3)^(-).Additionally,a low hydraulic retention time worsened the removal efficiency of NH_(4)^(+)/NO_(3)^(-).When the hydraulic retention time was 12 h,the optimal removal was achieved with NH_(4)^(+)and NO_(3)^(-)removal percentages both above 88%,and the corresponding nitrogen removal loading rates of NH_(4)^(+)and NO_(3)^(-)were 49.1 and 44.0 mg/(L·d),respectively.The removal of NH_(4)^(+)mainly occurred in the bottom section of the bioreactor through sulfate/ferric reducing anaerobic ammonium oxidation(Sulfammox/Feammox),nitrification,and anaerobic ammonium oxidation(Anammox)by functional microbes such as Nitrospira,Nitrosomonas,and Candidatus Kuenenia.Meanwhile,NO_(3)^(-)was mainly removed in the middle and upper sections of the bioreactor through autotrophic denitrification by Ferritrophicum,Thiobacillus,Rhodanobacter,and Pseudomonas,which possessed complete denitrification-related genes with high relative abundances.

关 键 词：ANAMMOX DENITRIFICATION FES NH_(4)^(+)/NO_(3)^(−) Sulfammox 

分 类 号：X70[环境科学与工程—环境工程]