期刊
BIORESOURCE TECHNOLOGY
卷 241, 期 -, 页码 750-759出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.06.014
关键词
Anammox; Mn2+; Inhibition; Pre-exposure; Sludge characteristics
资金
- Natural Science Foundation of China [51578204]
The short- and long-term effects of Mn2+ on the performance of anaerobic ammonium oxidation (anammox) granules were investigated in the present study. Anammox activity was determined at various Mn2+ concentrations in batch assays, and the 50% inhibition concentration value was determined to be 7.33 mg L-1. However, no obvious deterioration of reactor performance was observed during the 150-day continuous-flow operation, and the nitrogen removal efficiency of the test reactor (R-1) fluctuated between 91% and 92% as the Mn2+ concentration was increased from 1 to 200 mg L-1. Additionally, the specific anammox activity, heme c content and the amounts of extracellular polymeric substances in the anammox biomass increased and then subsequently decreased. The results demonstrated that short-term exposure to Mn2+ has a negative effect on anammox biomass, but the biomass could tolerate Mn2+ stress after acclimation to a high concentration of 200 mg L-1 at the end of the continuous-flow experiment. (C) 2017 Elsevier Ltd. All rights reserved.
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