Effect of COD/N ratios and DO concentrations on the NOB suppression in a multi-cycle SBR
Effect of COD/N ratios and DO concentrations on the NOB suppression in a multi-cycle SBR
复制标题
COD/N 比率和 DO 浓度对多循环 SBR 中 NOB 抑制的影响
DOI：
10.1016/j.jece.2021.105735
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发表时间：
2021-08
影响因子：
7.7
通讯作者：
Gao Fan
中科院分区：
文献类型：
--
作者：
Xu Guangjing;Zhang Zhihao;Gao Fan
多循环序批式反应器可以通过四步进料集成控制、低溶解氧浓度和短污泥停留时间来抑制NOB，但主流抑制NOB的关键控制参数仍不清楚。本研究研究了不同 COD/N 比和 DO 浓度对 NOB 抑制的影响。当COD/N比为4:1和1.5 mg DO/L时，亚硝酸盐累积率达到93.8%；当COD/N比为1.4:1和不同DO范围为0.3 mg/L和1.1 mg/L时，亚硝酸盐累积率在73.4%和80.0%之间。当 COD/N 比率降至 0.8:1 时，在 0.6 mg DO/L 时几乎没有亚硝酸盐积累。统计结果表明，COD/N比值、亚硝酸盐积累率和总氮去除率之间存在显着相关性，而DO浓度与亚硝酸盐积累率和总氮去除率之间不存在相关性。因此，抑制NOB的主要原因是反硝化菌与NOB之间的亚硝酸盐竞争，而不是AOB与NOB之间的氧气竞争。
NOB could be suppressed in a multi–cycle sequential batch reactor with an integrated control of four step feeding, low DO (dissolved oxygen) concentrations and short sludge retention time, but which is the key control parameter of mainstream NOB suppression remained unclear. This study investigated the effect of COD/N ratios and DO concentrations on NOB suppression with different COD/N ratios and DO concentrations. Nitrite accumulate rate reached 93.8% at COD/N ratio of 4:1 and 1.5 mg DO/L, and ranged between 73.4% and 80.0% at COD/N ratios of 1.4:1 and different DO ranges between 0.3 mg/L and 1.1 mg/L. As COD/N ratios decreased to 0.8:1, nearly no nitrite accumulated at 0.6 mg DO/L. Statistical results showed that there was a significant relationship among COD/N ratio, nitrite accumulate rate and total nitrogen removal efficiency, while there was no correlation between DO concentration and nitrite accumulate rate or total nitrogen removal efficiency. Therefore, the main reason of NOB suppression was nitrite competition between denitrifiers and NOB, rather than oxygen competition between AOB and NOB.
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DOI：
10.1038/ismej.2015.117
发表时间：
2016-01
期刊：
The ISME journal
影响因子：
--
作者：
Saunders AM;Albertsen M;Vollertsen J;Nielsen PH
通讯作者：
Nielsen PH
DOI：
10.1101/480780
发表时间：
2018-11
期刊：
bioRxiv
影响因子：
--
作者：
M. Laureni;D. Weissbrodt;K. Villez;O. Robin;N. de Jonge;A. Rosenthal;G. Wells;J. Nielsen;E. Morgenroth;A. Joss
通讯作者：
M. Laureni;D. Weissbrodt;K. Villez;O. Robin;N. de Jonge;A. Rosenthal;G. Wells;J. Nielsen;E. Morgenroth;A. Joss
影响因子：
8.8
作者：
Guangjing Xu;Han Wang;Jun Gu;Nan Shen;Z. Qiu;Yan Zhou;Yu Liu
通讯作者：
Guangjing Xu;Han Wang;Jun Gu;Nan Shen;Z. Qiu;Yan Zhou;Yu Liu
影响因子：
11.4
作者：
Gilbert, Eva M.;Agrawal, Shelesh;Lackner, Susanne
通讯作者：
Lackner, Susanne
影响因子：
12.8
作者：
C. Picioreanu;Julio Pérez;M. V. van Loosdrecht
通讯作者：
C. Picioreanu;Julio Pérez;M. V. van Loosdrecht