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Wang Min, Zhang Zhi, Chen Jieyun, Fan Gongduan, Jin Ke, Liang Peng, Hu Ling. Influence of different influent flow distribution ratios on biological nitrogen and carbon removal by multi-stages A/O process[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1430-1434.
Citation: Wang Min, Zhang Zhi, Chen Jieyun, Fan Gongduan, Jin Ke, Liang Peng, Hu Ling. Influence of different influent flow distribution ratios on biological nitrogen and carbon removal by multi-stages A/O process[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1430-1434.
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Influence of different influent flow distribution ratios on biological nitrogen and carbon removal by multi-stages A/O process

  • 1.

    Key Laboratory of Three Reservior Region’s Eco-Enviroment,Ministry of Education,Chongqing University, Chongqing 400045, China

  • 2.

    Building Design and Research Institute of the General Logistics Department of the Chinese People’s Liberation Army, Beijing 100036, China

  • 3.

    Sinopharm Chongqing Pharmaceutical and Medical Industry Design Institute, Chongqing 400022, China

  • Received Date: 18/05/2012
    Accepted Date: 23/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Three-stage step-feed A/O system was applied to treat sewage with low carbon source,experiments were carried out to investigate the effect of different influent flow distribution ratios on organic matter,nitrification and denitrification removal efficiency. It was showed that different flow distribution ratios (4∶3∶3, 5∶3∶2, 6∶3∶1) had a little effect on organic matter removal and nitrification efficiency, the effluent of COD,NH3-N were below 30 mg/L and 1 mg/L, respectively. But denitrification efficiency was considerably affected by the different flow distribution ratios. When flow distribution ratio was 5∶3∶2, carbon source of sewage was effective used, and the system achieved the optimum efficiency of denitrification. When flow distribution ratio was 5∶3∶2, the effluent TN was 5.7 mg/L with 82.9% removal efficiency,which was better than the flow distribution ratios of 6∶3∶1 and 4∶3∶3. In summary, the step-feed system is superior to single point feed system in the aspect of effective usage of carbon sources and energy saving.
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Influence of different influent flow distribution ratios on biological nitrogen and carbon removal by multi-stages A/O process

  • Received Date: 18/05/2012
  • Accepted Date: 23/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: Three-stage step-feed A/O system was applied to treat sewage with low carbon source,experiments were carried out to investigate the effect of different influent flow distribution ratios on organic matter,nitrification and denitrification removal efficiency. It was showed that different flow distribution ratios (4∶3∶3, 5∶3∶2, 6∶3∶1) had a little effect on organic matter removal and nitrification efficiency, the effluent of COD,NH3-N were below 30 mg/L and 1 mg/L, respectively. But denitrification efficiency was considerably affected by the different flow distribution ratios. When flow distribution ratio was 5∶3∶2, carbon source of sewage was effective used, and the system achieved the optimum efficiency of denitrification. When flow distribution ratio was 5∶3∶2, the effluent TN was 5.7 mg/L with 82.9% removal efficiency,which was better than the flow distribution ratios of 6∶3∶1 and 4∶3∶3. In summary, the step-feed system is superior to single point feed system in the aspect of effective usage of carbon sources and energy saving.

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