期刊
BIORESOURCE TECHNOLOGY
卷 112, 期 -, 页码 124-130出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.02.122
关键词
Anammox; Salinity shock; Nitrogen removal; Extracellular polymeric substances
资金
- National Natural Science Foundation of China [50808060, 51078121]
- Zhejiang Province Natural Science Foundation of China [Y5090072]
- Science and Technology Development Program of Hangzhou of Zhejiang Province in China [20091133B06]
- Zhejiang Key Scientific and Technological Innovation Team [2010R50039]
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 12 h, the sludge retention time (SRT) of the reactor decreased with increasing NaCl shock loads, ranging between 2.9 and 22.5 d, 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. (C) 2012 Elsevier Ltd. All rights reserved.
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