Effect of ammonium nitrogen concentration on the ammonia-oxidizing bacteria community in a membrane bioreactor for the treatment of anaerobically digested swine wastewater

文献类型: 外文期刊

第一作者: Sui, Qianwen

作者: Sui, Qianwen;Liu, Chong;Dong, Hongmin;Zhu, Zhiping;Sui, Qianwen;Liu, Chong;Dong, Hongmin;Zhu, Zhiping

作者机构:

关键词: Nitrification;Ammonia-oxidizing bacteria;Anaerobically digested wastewater;Membrane bioreactor;Biological nitrogen removal

期刊名称:JOURNAL OF BIOSCIENCE AND BIOENGINEERING ( 影响因子:2.894; 五年影响因子:2.746 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: A membrane bioreactor (MBR) was developed for the treatment of anaerobically digested swine wastewater and to investigate the effect of ammonium nitrogen concentration on biological nitrogen removal and ammonia-oxidizing bacteria (AOB) community structures. The MBR achieved a high NH4~+-N removal efficiency of 0.08 kgNMLSS~(-1) d~(-1) and removed 95% of the influent NH4~+-N. The TN removal rate was highest of 82.62% at COD/TN and BOD5/TN ratios of 8.76 ± 0.30 and 3.02 ± 0.09, respectively. With the decrease in ammonium nitrogen concentrations, the diversity of the AOB community declined and showed a simple pattern of DGGE. However, the AOB population size remained high, with abundance of 10~7-10~9 copies ml~(-1). With the decrease of ammonium nitrogen concentrations, Nitrosomonas eutropha gradually disappeared, whereas Nitrosomonas sp. OZK11 showed constant adaptability to survive during each treatment stage. The selective effect of ammonium concentration on AOB species could be due to the affinity for NH4~+-N. In this study, the changes of ammonium nitrogen concentrations in digested swine wastewater were found to have selective effects on the composition of AOB community, and biological nitrogen removal was improved by optimising the influencing parameters.

分类号: Q5`Q81`TS26

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