Anammox biofilm system under the stress of Hg(II): Nitrogen removal performance, microbial community dynamic and resistance genes expression

• Published in: Journal of hazardous materials Vol. 395; p. 122665
• Main Authors: Chen, Zhao, Zhang, Xiaojing, Ma, Yongpeng, Song, Yali, Li, Yingzhe, Geng, Guanglei, Huang, Yaning
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 05.08.2020
• Subjects: Ammonium Compounds; anaerobic ammonium oxidation; Anaerobiosis; Anammox; bacteria; biofilm; Biofilms; Bioreactors; Denitrification; Extracellular polymeric substances (EPS); Genes; Heavy metals; Hg(II); mercury; Mercury - toxicity; metal tolerance; microbial communities; Microbiota; nitrogen; Nitrogen - analysis; Oxidation-Reduction; polymers; Resistance; resistance genes; Sewage; total nitrogen; toxicity; wastewater; Resistance; Anammox; Extracellular polymeric substances (EPS); Hg(II); Genes; Heavy metals

[Display omitted] •AAOB could completely resist Hg(II) in concentrations (≤ 10 mg L−1).•Hg(II) in 20 mg L−1 could lower the TNRE to approximately 55 %.•The secretion of EPS helped AAOB resist the invasion of Hg(II).•Hg(II) induced the amplification of merA, merB, merD and merR. The existence of heav...