2014 Volume 8 Issue 12
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Wang Zhilong, Peng Bo, Li Xiaoming, Yang Qi, Chen Hongbo, Xu Dechao, Xie Jici, Luo Guan. Effect of temperatures on biological phosphorus removal in aerobic/extended-idle regime[J]. Chinese Journal of Environmental Engineering, 2014, 8(12): 5213-5220.
Citation: Wang Zhilong, Peng Bo, Li Xiaoming, Yang Qi, Chen Hongbo, Xu Dechao, Xie Jici, Luo Guan. Effect of temperatures on biological phosphorus removal in aerobic/extended-idle regime[J]. Chinese Journal of Environmental Engineering, 2014, 8(12): 5213-5220.
shu

Effect of temperatures on biological phosphorus removal in aerobic/extended-idle regime

  • 1.

    College of Environment Science and Engineering, Hunan University, Changsha 410082, China

  • 2.

    Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China

  • Received Date: 06/03/2014
    Accepted Date: 07/11/2013
    Available Online: 03/12/2014
    Fund Project:
  • Sodium propionate was adopted as the sole carbon source in synthetic wastewater, and four sequencing batch reactors(SBR) with four temperature gradients(R1=5℃, R2=15℃, R3=25℃, R4=35℃) were introduced to investigate the effect of temperature on biological phosphorus removal in aerobic/extended-idle regime.During the long-term operation in four SBRs, the effluent phosphorus concentrations were averagely 4.05, 2.17, 1.34 and 0.11 mg/L, with the corresponding 61.5%, 79.3%, 87.2% and 99.0% phosphorus removal efficiencies, and the phosphorus removal rates were 0.501, 1.432, 2.538 and 3.700 mg P/(g VSS· h), respectively.The results showed that increasing temperature could contribute to phosphorus removal.In addition, the activities of polyphosphate kinase(PPK) and exopolyphosp hate(PPX) were 0.093, 0213, 0.376, 0.549 U and 0.010, 0.019, 0.029, 0.025 U, respectively, and the rates of phosphorus uptaking and releasing increased, which indicated that temperature could impose the activities of PPK and PPX, thus affecting the phosphorus removal.During idle period, contents of glycogen and poly-β-hydroxyalkanoates(PHA) kept stable, while poly-phosphate became the main energy source, the phosphorus releasing contents per unit TSS were 1.95, 6.42, 9.90 and 9.56 mg P/(g TSS), which implied that the increasing temperature could promote degradation of poly-phosphate to provide more energy, thereby achieving better phosphorus uptake.
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Effect of temperatures on biological phosphorus removal in aerobic/extended-idle regime

  • Received Date: 06/03/2014
  • Accepted Date: 07/11/2013
  • Available Online: 03/12/2014
Fund Project:

Abstract: Sodium propionate was adopted as the sole carbon source in synthetic wastewater, and four sequencing batch reactors(SBR) with four temperature gradients(R1=5℃, R2=15℃, R3=25℃, R4=35℃) were introduced to investigate the effect of temperature on biological phosphorus removal in aerobic/extended-idle regime.During the long-term operation in four SBRs, the effluent phosphorus concentrations were averagely 4.05, 2.17, 1.34 and 0.11 mg/L, with the corresponding 61.5%, 79.3%, 87.2% and 99.0% phosphorus removal efficiencies, and the phosphorus removal rates were 0.501, 1.432, 2.538 and 3.700 mg P/(g VSS· h), respectively.The results showed that increasing temperature could contribute to phosphorus removal.In addition, the activities of polyphosphate kinase(PPK) and exopolyphosp hate(PPX) were 0.093, 0213, 0.376, 0.549 U and 0.010, 0.019, 0.029, 0.025 U, respectively, and the rates of phosphorus uptaking and releasing increased, which indicated that temperature could impose the activities of PPK and PPX, thus affecting the phosphorus removal.During idle period, contents of glycogen and poly-β-hydroxyalkanoates(PHA) kept stable, while poly-phosphate became the main energy source, the phosphorus releasing contents per unit TSS were 1.95, 6.42, 9.90 and 9.56 mg P/(g TSS), which implied that the increasing temperature could promote degradation of poly-phosphate to provide more energy, thereby achieving better phosphorus uptake.

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