反硝化细菌
强化生物除磷
磷
微生物种群生物学
缺氧水域
曝气
适应
人口
化学
环境化学
反硝化
硝酸盐
亚硝酸盐
活性污泥
制浆造纸工业
氮气
环境工程
生物
污水处理
环境科学
植物
细菌
有机化学
人口学
社会学
工程类
遗传学
作者
Hongliang Dai,Xiwu Lü,Lihong Peng,Xiang Li,Zhiyong Dai
标识
DOI:10.1080/09593330.2016.1278276
摘要
An efficient one-step domestication method with mixed electron acceptors and short-time post-aeration was developed for the enrichment culture of denitrifying phosphorus removal sludge. The acclimation time, performance of nitrogen and phosphorus simultaneous removal and microbial community structure were investigated to reveal the difference among the obtained phosphorus removal sludge using different acclimation ways. Results showed that the proposed method with optimal proportion of nitrite and nitrate could significantly shorten domestication time (28 days) compared with the traditional two-step method (60 days), but exerted nearly no influence on the removal efficiency of nitrogen and phosphorus. High-throughput sequencing revealed that similar microbial community structure of DPAOs sludge was obtained with different acclimation methods. Compared with seed sludge, microbial community shifted obviously, and the dominant microbial population of Dechloromonas-related phosphorus removal bacteria increased significantly. It could be inferred that the appropriate concentration of nitrite was conducive to the rapid enrichment of DPAOs under alternative anaerobic/anoxic operation. Meanwhile, anaerobic/oxic condition was favorable for the enrichment of Candidatus Accumulibacter-related phosphorus removal organisms, and short-time post-aeration in the proposed method could reduce the potential public health hazard.
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