2017 Volume 11 Issue 9
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MA Qiuying, LI Dong, FENG Li, WANG Hongjie, ZHANG Liqiu. Nitrogen removal efficiency and influencing factors in a pre-denitrification bio-filter system[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4932-4936. doi: 10.12030/j.cjee.201611181
Citation: MA Qiuying, LI Dong, FENG Li, WANG Hongjie, ZHANG Liqiu. Nitrogen removal efficiency and influencing factors in a pre-denitrification bio-filter system[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4932-4936. doi: 10.12030/j.cjee.201611181
shu

Nitrogen removal efficiency and influencing factors in a pre-denitrification bio-filter system

  • 1.

    College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China

  • Received Date: 02/02/2017
    Accepted Date: 23/11/2016
    Available Online: 26/08/2017
    Fund Project:
  • Pre-denitrification bio-filter system is widely used in advance treatment of wastewater, owing to its excellent denitrification performance. A pre-denitrification bio-filter system was applied for treating laboratory simulated tail-water from municipal sewage treatment plant. By adjusting reflux ratio of nitrification liquor (50%, 100% and 150%) and hydraulic loading (1.0, 1.5 and 2.0 m3·(m2·h)-1), the removal efficiency of COD, TN and NH4+-N in the pre-denitrification bio-filter system were investigated. The results showed that, when the reflux ratio of nitrification liquor was 100%, the system had the best pollutants removal performance, the effluent concentrations of COD, TN and NH4+-N reduced from the 120, 35 and 15 mg·L-1 to 7.62, 5.02 and 0.60 mg·L-1, showing average removal efficiency of 93.65%, 85.65% and 96.00%, respectively. Under a hydraulic loading of 1.5 m3·(m2·h)-1, the average removal rates of COD, TN, NH4+-N reached to 83.00%, 90.14% and 95.73%, respectively, and the effluent water quality could meet the requirement of first grade A standards in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).
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Nitrogen removal efficiency and influencing factors in a pre-denitrification bio-filter system

  • Received Date: 02/02/2017
  • Accepted Date: 23/11/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: Pre-denitrification bio-filter system is widely used in advance treatment of wastewater, owing to its excellent denitrification performance. A pre-denitrification bio-filter system was applied for treating laboratory simulated tail-water from municipal sewage treatment plant. By adjusting reflux ratio of nitrification liquor (50%, 100% and 150%) and hydraulic loading (1.0, 1.5 and 2.0 m3·(m2·h)-1), the removal efficiency of COD, TN and NH4+-N in the pre-denitrification bio-filter system were investigated. The results showed that, when the reflux ratio of nitrification liquor was 100%, the system had the best pollutants removal performance, the effluent concentrations of COD, TN and NH4+-N reduced from the 120, 35 and 15 mg·L-1 to 7.62, 5.02 and 0.60 mg·L-1, showing average removal efficiency of 93.65%, 85.65% and 96.00%, respectively. Under a hydraulic loading of 1.5 m3·(m2·h)-1, the average removal rates of COD, TN, NH4+-N reached to 83.00%, 90.14% and 95.73%, respectively, and the effluent water quality could meet the requirement of first grade A standards in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).

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