Analyzing the revolution of anaerobic ammonium oxidation (anammox) performance and sludge characteristics under zinc inhibition.
In the present study, the short- and long-term effects of Zn(II) on the anaerobic ammonium oxidation (anammox) performance and sludge characteristics were evaluated. The anammox activity decreased with increasing Zn(II) concentration and pre-exposure time in short-term tests. The half maximal inhibitory concentration (IC50) of Zn(II) was found to be 25.0 mg L(-1). The 24 and 48-h pre-exposure time was a restricted factor impacting the anammox activity, and washing the inhibited sludge with buffer solution only worked under 0 and 24-h pre-exposure time. The anammox sludge could tolerate 5 mg L(-1) Zn(II) but was suppressed at 8 mg L(-1). The inhibited performance could be remitted, as the combination strategies were applied, and after the short term of recovery period, the inhibited sludge characteristics were remitted to the normal.
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China.
Qian-Qian
QQ
Zhang
Zheng-Zhe
ZZ
Zhang
Qiong
Q
Guo
Jiao-Jiao
JJ
Wang
Hui-Zhong
HZ
Wang
Ren-Cun
RC
Jin
D000641:Ammonia / Q000378:metabolism*; D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D006418:Heme / Q000031:analogs & derivatives / Q000378:metabolism; D020128:Inhibitory Concentration 50; D007700:Kinetics; D059013:Microbial Consortia / Q000187:drug effects; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D015032:Zinc / Q000494:pharmacology*
D012722:Sewage; C031690:heme C; D006418:Heme; D000641:Ammonia; D015032:Zinc