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梁帆, 王洪臣, 齐鲁, 范海涛. 不同SRT条件下曝气池临界DO的比较研究[J]. 环境工程学报, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
引用本文: 梁帆, 王洪臣, 齐鲁, 范海涛. 不同SRT条件下曝气池临界DO的比较研究[J]. 环境工程学报, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
shu
LIANG Fan, WANG Hongchen, QI Lu, FAN Haitao. Researches for comparison of critical DO in aeration tank under different SRT conditions[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
Citation: LIANG Fan, WANG Hongchen, QI Lu, FAN Haitao. Researches for comparison of critical DO in aeration tank under different SRT conditions[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
shu

不同SRT条件下曝气池临界DO的比较研究

  • 1.

    中国人民大学环境学院, 北京 100872

  • 基金项目:

    国家水体污染控制与治理科技重大专项（2013ZX07314-001）

  • 中图分类号: X703.1

Researches for comparison of critical DO in aeration tank under different SRT conditions

  • 1.

    School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China

  • Fund Project:

  • 摘要: 为了优化污水处理厂中不同SRT条件下曝气池DO值，对不同DO条件下COD和NH4+-N去除规律进行了研究和探讨，得到了出水刚好满足一级A排放标准的最小DO浓度，并将该DO值定义为曝气池的临界DO值。实验结果表明，活性污泥系统具有较强的COD去除能力，不同SRT在不同DO条件下的COD平均去除率均在85%以上，说明COD的去除效果基本不受DO浓度的影响；而DO浓度对NH4+-N的去除效果有较大的影响，随着SRT的增大，NH4+-N的去除效果逐渐变好，低DO浓度对NH4+-N去除的负面效应也逐渐减弱。以出水NH4+-N达到一级A排放标准为目标，SRT为10、17.5、25和35 d时的临界DO值分别为1.5、0.8和0.3 mg·L-1。最终通过拟合，得到了临界DO值与SRT关系的经验公式。
    Abstract: In order to optimize the dissolved oxygen (DO) of an aeration tank in a wastewater treatment plant in different SRT conditions, the removal performances of COD and NH4+-N were studied with different DO concentrations. The critical DO point of the aeration tank was defined as the minimum DO concentration, with which the effluent could meet the Class A Urban Sewage Treatment Plant Nutrient Discharge Standard of China. The results showed that the activated sludge system presented a strong COD removal performance. The average COD removal efficiency rates under different DO concentrations and SRT conditions were more than 85%, which indicated that the removal of COD was not affected substantially by the DO. However, the DO concentration had a significant effect on the NH4+-N removal efficiency. The NH4+-N removal performance gradually improved with an increase of the SRT, which reduced the negative effect of the low DO concentration. In order for the effluent NH4+-N to meet the requirements of the Class A standard, the critical DO points for the SRT of 10, 17.5, 25, and 35 d were 1.5, 0.8, 0.5, and 0.3 mg·L-1, respectively. Finally, through the fitting, the empirical formula for the relationship between the critical DO and the SRT was obtained.
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  • 收稿日期:  2015-04-26
  • 刊出日期:  2016-09-10
梁帆, 王洪臣, 齐鲁, 范海涛. 不同SRT条件下曝气池临界DO的比较研究[J]. 环境工程学报, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
引用本文: 梁帆, 王洪臣, 齐鲁, 范海涛. 不同SRT条件下曝气池临界DO的比较研究[J]. 环境工程学报, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
shu
LIANG Fan, WANG Hongchen, QI Lu, FAN Haitao. Researches for comparison of critical DO in aeration tank under different SRT conditions[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
Citation: LIANG Fan, WANG Hongchen, QI Lu, FAN Haitao. Researches for comparison of critical DO in aeration tank under different SRT conditions[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4832-4836. doi: 10.12030/j.cjee.201504073
shu

不同SRT条件下曝气池临界DO的比较研究

  • 1. 中国人民大学环境学院, 北京 100872
  • 收稿日期:  2015-04-26
基金项目:

国家水体污染控制与治理科技重大专项（2013ZX07314-001）

摘要: 为了优化污水处理厂中不同SRT条件下曝气池DO值，对不同DO条件下COD和NH4+-N去除规律进行了研究和探讨，得到了出水刚好满足一级A排放标准的最小DO浓度，并将该DO值定义为曝气池的临界DO值。实验结果表明，活性污泥系统具有较强的COD去除能力，不同SRT在不同DO条件下的COD平均去除率均在85%以上，说明COD的去除效果基本不受DO浓度的影响；而DO浓度对NH4+-N的去除效果有较大的影响，随着SRT的增大，NH4+-N的去除效果逐渐变好，低DO浓度对NH4+-N去除的负面效应也逐渐减弱。以出水NH4+-N达到一级A排放标准为目标，SRT为10、17.5、25和35 d时的临界DO值分别为1.5、0.8和0.3 mg·L-1。最终通过拟合，得到了临界DO值与SRT关系的经验公式。

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