MBR工艺短硝化反硝化处理生活污水的研究
Study on shortcut nitrification and denitrification in domestic wastewater treatment by membrane bioreactor
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摘要: 以模拟生活污水为对象，研究了中温（25～30℃）条件下，膜生物反应器短硝化反硝化生物脱氮的效果，试验结果表明,在曝气量为0.15m3/h,pH值为7～8的条件下，出水COD保持在100mg/L以下（平均49mg/L），出水氨氮在5.0mg/L以下（平均3.1 mg/L），NO-2得到了富集，出水中基本监测不出NO-3，总氮去除率平均为86.2%，最高达94.0%，且系统的耐冲击负荷能力较好；曝气量和pH值是短硝化过程的重要影响因素。Abstract: Nitrogen removal was studied with a membrane reactor in the treatment of simulated domestic wastewater at moderate temperatures (25～30℃). The shortcut nitrification and denitrification technique was used to effectively remove nitrogen. The results showed that the COD of effluent was steadily below 100mg/L (49 mg/L on the average), and the NH+4-N in effluent was less than 5.0mg/L (3.1mg/L on the average). With the stabilization of the system, the accumulation of NO-2 was achieved, and -3 was not detected virtually in the effluent. The average removal efficiency of total nitrogen could reach 86.2% (94.0% as the maximum). It was also revealed that the process was capable of overcoming shock loadings of the influents. In addition, the aeration flow rate and pH were the significant influencing factors on the shortcut nitrification.
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Key words:
- MBR /
- short-cut nitrification and denitrification /
- aeration flow rate /
- pH
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