title: Impacts of transient salinity shock loads on Anammox process performance.
abstract: The effect of salinity shock (5-60 g l(-1) NaCl) on anaerobic ammonium oxidation (Anammox) process performance was investigated. The response to the shock loads can be divided into three stages: a sensitive period, an interim stable period and a recovery period which lasted 6-26 d. When exposed to NaCl shocks for 12h, the sludge retention time (SRT) of the reactor decreased with increasing NaCl shock loads, ranging between 2.9 and 22.5d, meanwhile the biomass decreased by 0.8-37.4%. When shock loads were higher than 10 g l(-1) NaCl, the reactor was at risk of losing too much biomass. The granular surface was rough due to rapid growth of filamentous bacteria and extracellular polymeric substances (EPS), also the EPS amount changed during all NaCl shock loads. In the latter of shocks, the microorganisms in the reactor showed a little adaption to the NaCl shock.
authors.affiliation: Department of Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, PR China.
authors.forename: Chun
authors.initials: C
authors.lastname: Ma
authors.forename: Ren-Cun
authors.initials: RC
authors.lastname: Jin
authors.forename: Guang-Feng
authors.initials: GF
authors.lastname: Yang
authors.forename: Jin-Jin
authors.initials: JJ
authors.lastname: Yu
authors.forename: Bao-Shan
authors.initials: BS
authors.lastname: Xing
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Zhang
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D018533:Biomass; D001704:Biopolymers / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology; D001709:Biotechnology / Q000379:methods*; D005110:Extracellular Space / Q000737:chemistry / Q000187:drug effects; D010084:Oxidation-Reduction / Q000187:drug effects; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D054712:Salinity; D012722:Sewage / Q000382:microbiology; D012965:Sodium Chloride / Q000494:pharmacology; D012995:Solubility / Q000187:drug effects; D013997:Time Factors
chemical_list: D001704:Biopolymers; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D012965:Sodium Chloride