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Impacts of salt shocking and the selection of a suitable reversal agent on anammox.
He, Shilong; Yang, Wan; Li, Wenji; Zhang, Yanlong; Qin, Meng; Mao, Zhen.
Afiliación
  • He S; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, PR China. Electronic address: hslongrcees@163.com.
  • Yang W; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, PR China.
  • Li W; College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang Province, PR China.
  • Zhang Y; College of the Environment & Ecology, Xiamen University, South Xiangan Rd, Xiamen 361102, Fujian, PR China.
  • Qin M; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, PR China.
  • Mao Z; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, PR China.
Sci Total Environ ; 692: 602-612, 2019 Nov 20.
Article en En | MEDLINE | ID: mdl-31539968
In this study, an anaerobic ammonium oxidation (anammox) reactor, which was inhibited by a salinity of 50 g NaCl L-1 during a long-term experiment, was rapidly restarted by decreasing the salinity to 20 g NaCl L-1 and adding biomass. The effects of exposure time and shock concentrations on the anammox reactor indicate that anammox granular sludge has a high tolerance to salinity and strong ability for self-recovery. The nitrogen removal efficiency was higher than 50% after exposure to 50 g NaCl L-1 for 66 h. To shorten the time taken for effluent nitrogen concentrations to attain national standards (GB18918-2002) after the anammox reactor was shocked with NaCl, reactor performance (i.e., recovery) after the addition of K+, glycine betaine, Fe2+, and hydroxylamine were compared after the reactor was inhibited by 80 g NaCl L-1. The results indicate that hydroxylamine was the best reversal agent. The recovery time of the anammox reactor could be shortened by 50% following the addition of hydroxylamine. The most favorable NH2OH-N/NO2--N concentration ratio for improving nitrogen removal of anammox was 1:11. The abundances of Planctomycetes and its genera Candidatus Kuenenia and Brocadiaceae_g_unclassified increased after repeated salinity shock-recovery phases, indicating that Candidatus Kuenenia and Brocadiaceae_g_unclassified are able to adapt to NaCl shocking and recovery.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Bacterias Anaerobias / Cloruro de Sodio / Eliminación de Residuos Líquidos / Microbiota / Amoníaco Idioma: En Revista: Sci Total Environ Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Bacterias Anaerobias / Cloruro de Sodio / Eliminación de Residuos Líquidos / Microbiota / Amoníaco Idioma: En Revista: Sci Total Environ Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos