title: Enhancement of anammox activity by addition of compatible solutes at high salinity conditions.
abstract: The enhancement effect of compatible solutes on anammox activity under salinity stress was investigated. Glycine betaine (GB) was the most effective in alleviating salt toxicity, although all the compatible solutes (GB, trehalose and ectoine) were found to be valid. Acclimation potential of anammox biomass under salinity of 30 g/L increased significantly with GB addition. The recovery time in the reactor with GB addition (RB) (49 days) accompanied by a more stable stoichiometric ratio was 2.65 times shorter than in the control reactor (RC) (130 days). After 49 days, the extracellular polymeric substances and the tetrazolium chloride-dehydrogenase activity were 217.9 mg/g VSS and 38.7 μg TF/g VSS/h in RB, 1.86 times lower and 3.17 times higher than the levels in RC, respectively. RB possessed evident superiority in the aspects of microbial population proportion. And thus, compatible solutes addition was regarded as one of the feasible solution to counteract saline inhibition on anammox.
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Mu
authors.initials: M
authors.lastname: Liu
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China. Electronic address: pyz@bjut.edu.cn.
authors.forename: Yongzhen
authors.initials: Y
authors.lastname: Peng
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Shuying
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Tiantian
authors.initials: T
authors.lastname: Liu
authors.affiliation: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Han
authors.initials: H
authors.lastname: Xiao
mesh_terms: D000599:Amino Acids, Diamino / Q000494:pharmacology*; D064751:Ammonium Compounds / Q000378:metabolism*; D000693:Anaerobiosis / Q000187:drug effects; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D001622:Betaine / Q000494:pharmacology*; D001673:Biodegradation, Environmental / Q000187:drug effects; D018533:Biomass; D009584:Nitrogen / Q000302:isolation & purification; D010084:Oxidation-Reduction / Q000187:drug effects; D010088:Oxidoreductases / Q000378:metabolism; D054712:Salinity; D013997:Time Factors; D014199:Trehalose / Q000494:pharmacology*
chemical_list: D000599:Amino Acids, Diamino; D064751:Ammonium Compounds; D001622:Betaine; C045628:ectoine; D014199:Trehalose; D010088:Oxidoreductases; D009584:Nitrogen
keywords: Anammox; Compatible solutes; Microbial community structure; Salinity