2009 Volume 3 Issue 11
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Zhang Hui, Zhang Hanmin, Yang Fenglin, Wang Xinhua. Contrast experimental study on the cultivation mode of denitrifying phosphorus removal granules[J]. Chinese Journal of Environmental Engineering, 2009, 3(11): 2061-2066.
Citation: Zhang Hui, Zhang Hanmin, Yang Fenglin, Wang Xinhua. Contrast experimental study on the cultivation mode of denitrifying phosphorus removal granules[J]. Chinese Journal of Environmental Engineering, 2009, 3(11): 2061-2066.
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Contrast experimental study on the cultivation mode of denitrifying phosphorus removal granules

  • 1.

    Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024,China

  • Received Date: 04/12/2008
    Accepted Date: 13/11/2008
    Fund Project:
  • Two same SBARs (sequencing batch airlifting reactors) were used to study the cultivation mode of the denitrifying phosphorus removal granules. R1 was operated under the A/O/A (anaerobic/oxic/anoxic) mode all along, enriching DPAOs (denitrifying phosphorusaccumulating organisms) with the granulation process; while R2 was operated under the A/O (anaerobic/oxic) mode firstly, then added an anoxic phase when granulation finished in order to form A/O/A mode also and strengthen the enrichment of DPAOs. It was shown that R2 took shorter time for granulation than R1, but granular settling velocity and specific gravity in R2 (30.4 m/h and 1.022 g/cm3) were lower than that of R1 (35.9 m/h and 1.061 g/cm3). The average removal efficiencies of COD，NH+4-N，TN，TP in R1 were 86%, 98%, 82% and 91% respectively. In comparison, the corresponding values in R2 were 86%, 99%, 74% and 66% respectively, which were lower than that of R1. From the results of day 183, it was indicated that DPAOs fraction in R1 and R2 were 44.7% and 20.9%.
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Contrast experimental study on the cultivation mode of denitrifying phosphorus removal granules

  • Received Date: 04/12/2008
  • Accepted Date: 13/11/2008
Fund Project:

Abstract: Two same SBARs (sequencing batch airlifting reactors) were used to study the cultivation mode of the denitrifying phosphorus removal granules. R1 was operated under the A/O/A (anaerobic/oxic/anoxic) mode all along, enriching DPAOs (denitrifying phosphorusaccumulating organisms) with the granulation process; while R2 was operated under the A/O (anaerobic/oxic) mode firstly, then added an anoxic phase when granulation finished in order to form A/O/A mode also and strengthen the enrichment of DPAOs. It was shown that R2 took shorter time for granulation than R1, but granular settling velocity and specific gravity in R2 (30.4 m/h and 1.022 g/cm3) were lower than that of R1 (35.9 m/h and 1.061 g/cm3). The average removal efficiencies of COD，NH+4-N，TN，TP in R1 were 86%, 98%, 82% and 91% respectively. In comparison, the corresponding values in R2 were 86%, 99%, 74% and 66% respectively, which were lower than that of R1. From the results of day 183, it was indicated that DPAOs fraction in R1 and R2 were 44.7% and 20.9%.

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