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Yang Wei, Zhao Qiujing, Han Zhengshuang, Li Kai, Liang Heng, Li Guibai. Pollutants removal characteristics of natural start-up and steady operation of membrane bioreactor (MBR) for treating polluted surface water[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1363-1367.
Citation: Yang Wei, Zhao Qiujing, Han Zhengshuang, Li Kai, Liang Heng, Li Guibai. Pollutants removal characteristics of natural start-up and steady operation of membrane bioreactor (MBR) for treating polluted surface water[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1363-1367.
shu

Pollutants removal characteristics of natural start-up and steady operation of membrane bioreactor (MBR) for treating polluted surface water

  • 1.

    Department of Environmental Engineering, Harbin University of Commerce,Harbin 150076, China

  • 2.

    Research Center on Life Sciences and Environmental Sciences,Harbin University of Commerce,Harbin 150076, China

  • 3.

    Post-Doctoral Stations of Environmental Science & Engineering, Harbin Institute of Technology, Harbin 150090, China

  • 4.

    State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China

  • Received Date: 23/10/2012
    Accepted Date: 01/08/2012
    Available Online: 09/04/2013
    Fund Project:
  • A bench scale membrane bioreactor (MBR) was constructed for investigating the pollutants removal characteristics of natural start-up and steady operation of MBR for treating polluted surface water. During the experiments, there was no clear indication for the maturity of heterotrophic bacteria, and the removal efficiencies for DOC, UV254 and CODMn were only (14.5±5.1)%, (12.6±5.6)% and (31.2±7.4)%, respectively. Therefore, the MBR need to be coupled with other processes to improve its capacity for removal of organic matter. However, the indications for the maturity of nitroso-bacteria and nitro-bacteria were visible. Respectively, the nitroso-bacteria came to mature 23 days after start-up and nitro-bacteria came to mature 31 days after start-up. During the steady state, the removal of influent NH3-N was over 80% and the effluent NO2--N was bellow 0.05 mg/L. Besides, the results of ammonia removal demonstrated that the alkalinity had significant influence on the performance of MBR for ammonia removal, and the removal efficiency of ammonia increased from (86.1±3.7)% to (98.0±1.6)% while dosing 30 mg/L of NaHCO3 in influent. In the investigation, the membrane in MBR was operated under the conditions of constant flux (10 L/(m2·h)), continuous aeration and backwashing for 15 s after every 10 min of filtration. Under these conditions, obvious membrane fouling was observed, with the average trans-membrane pressure development rate of 0.45 kPa/d. To mitigate the membrane fouling of MBR, it is required to further optimize the relevant operating parameters.
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Pollutants removal characteristics of natural start-up and steady operation of membrane bioreactor (MBR) for treating polluted surface water

  • Received Date: 23/10/2012
  • Accepted Date: 01/08/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: A bench scale membrane bioreactor (MBR) was constructed for investigating the pollutants removal characteristics of natural start-up and steady operation of MBR for treating polluted surface water. During the experiments, there was no clear indication for the maturity of heterotrophic bacteria, and the removal efficiencies for DOC, UV254 and CODMn were only (14.5±5.1)%, (12.6±5.6)% and (31.2±7.4)%, respectively. Therefore, the MBR need to be coupled with other processes to improve its capacity for removal of organic matter. However, the indications for the maturity of nitroso-bacteria and nitro-bacteria were visible. Respectively, the nitroso-bacteria came to mature 23 days after start-up and nitro-bacteria came to mature 31 days after start-up. During the steady state, the removal of influent NH3-N was over 80% and the effluent NO2--N was bellow 0.05 mg/L. Besides, the results of ammonia removal demonstrated that the alkalinity had significant influence on the performance of MBR for ammonia removal, and the removal efficiency of ammonia increased from (86.1±3.7)% to (98.0±1.6)% while dosing 30 mg/L of NaHCO3 in influent. In the investigation, the membrane in MBR was operated under the conditions of constant flux (10 L/(m2·h)), continuous aeration and backwashing for 15 s after every 10 min of filtration. Under these conditions, obvious membrane fouling was observed, with the average trans-membrane pressure development rate of 0.45 kPa/d. To mitigate the membrane fouling of MBR, it is required to further optimize the relevant operating parameters.

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