College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
Bioresour Technol. 2017 Oct;241:750-759. doi: 10.1016/j.biortech.2017.06.014. Epub 2017 Jun 14.
The short- and long-term effects of Mn on the performance of anaerobic ammonium oxidation (anammox) granules were investigated in the present study. Anammox activity was determined at various Mn concentrations in batch assays, and the 50% inhibition concentration value was determined to be 7.33mgL. 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) fluctuated between 91% and 92% as the Mn concentration was increased from 1 to 200mgL. 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 Mn has a negative effect on anammox biomass, but the biomass could tolerate Mn stress after acclimation to a high concentration of 200mgL at the end of the continuous-flow experiment.
本研究考察了锰对厌氧氨氧化（anammox）颗粒短期和长期性能的影响。在批式实验中，通过不同的锰浓度来确定 anammox 活性，并确定 50%抑制浓度值为 7.33mg/L。然而，在 150 天的连续流动运行过程中，并没有观察到反应器性能的明显恶化，当锰浓度从 1mg/L 增加到 200mg/L 时，试验反应器（R）的氮去除效率在 91%至 92%之间波动。此外，anammox 生物量的比 anammox 活性、细胞色素 c 含量和胞外聚合物物质的量先增加后减少。结果表明，短期暴露于锰对 anammox 生物量有负面影响，但在连续流动实验结束时，生物量可以耐受 200mg/L 高浓度的锰胁迫。
