Effects of 2,4,6-trichlorophenol on simultaneous nitrification and denitrification: Performance, possible degradation pathway and bacterial community structure.
Effects of 2,4,6-trichlorophenol on simultaneous nitrification and denitrification: Performance, possible degradation pathway and bacterial community structure.
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DOI：
10.1016/j.biortech.2019.121757
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发表时间：
2019-10
影响因子：
11.4
通讯作者：
Na Tong;Jianqi Yuan;Hao Xu;Shaobin Huang;Congcong Sun;X. Wen;Yongqing Zhang
中科院分区：
文献类型：
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作者：
Na Tong;Jianqi Yuan;Hao Xu;Shaobin Huang;Congcong Sun;X. Wen;Yongqing Zhang
本研究旨在研究不同 2,4,6-三氯苯酚 (TCP) 浓度对连续间歇式生物膜反应器中建立的同步硝化和反硝化过程性能的影响。并探讨了2,4,6-TCP的降解情况以及可能的降解途径和微生物群落结构。结果表明，2,4,6-TCP抑制硝化作用，导致铵态氮去除率下降。但2,4,6-TCP对反硝化作用的影响不同。硝酸盐积累量呈现先减少后增加的趋势，而亚硝酸盐积累量则呈现先减少后增加的趋势，变化不大。 25mg/l 2,4,6-TCP的适应和恢复时间最长。此外，该工艺对2,4,6-TCP有良好的降解效果。比较不同浓度下2,4,6-TCP的降解情况，结果表明2,4,6-TCP主要被还原为2,4-二氯苯酚。随着2,4,6-TCP浓度的增加，反应器内细菌群落差异显着。
This study aimed to investigate the effect of different 2,4,6-trichlorophenol (TCP) concentrations on the performance of simultaneous nitrification and denitrification processes established in a sequential batch biofilm reactor. And the degradation and the possible degradation pathway of 2,4,6-TCP and microbial community structure were also explored. Results indicated that 2,4,6-TCP inhibited the nitrification with the decrease in ammonium nitrogen removal. However, 2,4,6-TCP had different effects on denitrification. Nitrate accumulation showed the tendency to decrease first and then increase, whilst nitrite accumulation showed the opposite with a small change. The adaptation and recovery time of 25 mg/l 2,4,6-TCP was longest. In addition, the process had a good degradation effect on 2,4,6-TCP. Comparing the degradation of 2,4,6-TCP under different concentrations, the result showed that 2,4,6-TCP was mainly reduced to 2,4-dichlorophenol. With the increase in 2,4,6-TCP concentration, the differences in the bacterial community in the reactor were significant.