标題: Achieving Partial Nitrification via Intermittent Aeration in SBR and Short-Term Effects of Different C/N Ratios on Reactor Performance and Microbial Community Structure

作者: Zhou, ZY (Zhou, Zhengyao); Qi, MX (Qi, Meixia); Wang, HP (Wang, Hongping)

來源出版物: WATER  卷: 12  期: 12  文獻号: 3485  DOI: 10.3390/w12123485  出版年: DEC 2020  

摘要: A sequencing batch reactor (SBR) with an intermittent aeration mode was established to achieve partial nitrification (PN) and the short-term effects of C/N ratios were investigated. Stable nitrite accumulation was achieved after 107 cycles, about 56d, with the average ammonia nitrogen removal efficiency (ARE) and nitrite accumulation rate (NAR) of 96.92% and 82.49%, respectively. When the C/N ratios decreased from 4.64 to 3.87 and 2.32, ARE and NAR still kept a stable and high level. However, when the C/N ratio further decreased to 0.77, nitrite accumulation became fluctuation, and ARE, total nitrogen (TN), and chemical oxygen demand (COD) removal performance declined obviously. Except for four common phyla (Proteobacteria, Bacteroidetes, Chloroflexi, and Actinobacteria) in the wastewater treatment system, Patescibacteria, the newly defined superphylum, was found and became the most dominant phylum in the PN sludge for their ultra-small cell size. The only ammonia oxidation bacteria (AOB), Nitrosomonas, and nitrite oxidation bacteria (NOB), Nitrospira, were detected. The relative abundance of NOB was low at different C/N ratios, showing the stable and effective inhibition effects of intermittent aeration on NOB growth.

入藏号: WOS:000602858300001

語言: English

文獻類型: Article

作者關鍵詞: partial nitrification; intermittent aeration; C/N ratio; high-throughput sequencing; microbial community

地址: [Zhou, Zhengyao; Qi, Meixia; Wang, Hongping] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Engn, Wuhan 430079, Peoples R China.

通訊作者地址: Wang, HP (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Engn, Wuhan 430079, Peoples R China.

電子郵件地址: 17607198893@163.com; qimeixia@163.com; hpwangwhu@163.com

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