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Chen Zhiqiang, Guan Huabin. Experiment on start-up phase of new modified septic tanks treating domestic sewage[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1267-1272.
Citation: Chen Zhiqiang, Guan Huabin. Experiment on start-up phase of new modified septic tanks treating domestic sewage[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1267-1272.
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Experiment on start-up phase of new modified septic tanks treating domestic sewage

  • 1.

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

  • Received Date: 28/03/2012
    Accepted Date: 20/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Three on-site septic tanks, namely ABR-septic tank(R1), YDT-carrier-septic tank(R2) and traditional septic tank(R3), were operated in parallel over a three-month period under the hydraulic retention times (HRT) of 36 hours at sewage temperature of 14~29℃. The achieved CODtot removal efficiencies in R1 and R2 increased by 30.5% and 9.2%, respectively,compared with R3 at the stage of 24℃, while the value reduced to 10.9% and 9% in the phase of 16℃.The achieved removal efficiencies of TN and NH4+-N arrived at 5%~30%, and the value of TP was negligible,with approximately 5%. R1 achieved a better specific methane production rate as compared to R2 and R3. The two modified septic tanks improve biochemical characters and attain better removal efficiency for domestic sewage. The results provide a technical support and a theoretical basis for the modification of septic tank.
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Experiment on start-up phase of new modified septic tanks treating domestic sewage

  • Received Date: 28/03/2012
  • Accepted Date: 20/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: Three on-site septic tanks, namely ABR-septic tank(R1), YDT-carrier-septic tank(R2) and traditional septic tank(R3), were operated in parallel over a three-month period under the hydraulic retention times (HRT) of 36 hours at sewage temperature of 14~29℃. The achieved CODtot removal efficiencies in R1 and R2 increased by 30.5% and 9.2%, respectively,compared with R3 at the stage of 24℃, while the value reduced to 10.9% and 9% in the phase of 16℃.The achieved removal efficiencies of TN and NH4+-N arrived at 5%~30%, and the value of TP was negligible,with approximately 5%. R1 achieved a better specific methane production rate as compared to R2 and R3. The two modified septic tanks improve biochemical characters and attain better removal efficiency for domestic sewage. The results provide a technical support and a theoretical basis for the modification of septic tank.

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