2009 Volume 3 Issue 11
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Xu Liwei, Huang Ming, Zhang Xuehong, Lin Hua, Wang Xiaoming, Shi Jiagang. Effect of aeration rate on bioleaching heavy metal from sewage sludge[J]. Chinese Journal of Environmental Engineering, 2009, 3(11): 2052-2056.
Citation: Xu Liwei, Huang Ming, Zhang Xuehong, Lin Hua, Wang Xiaoming, Shi Jiagang. Effect of aeration rate on bioleaching heavy metal from sewage sludge[J]. Chinese Journal of Environmental Engineering, 2009, 3(11): 2052-2056.
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Effect of aeration rate on bioleaching heavy metal from sewage sludge

  • 1.

    Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045,China；2.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

  • 2.

    College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China；3.The Guangxi Key Laboratory of Environmental Engineering ，Protection and Assessment，Guilin 541004,China

  • Received Date: 07/02/2009
    Accepted Date: 15/01/2009
    Fund Project:
  • In this research, sewage sludge taken from Guilin Wastewater Treatment Plant（WWTP） was selected as cultivation medium for the growth of Thiobacillus ferrooxidans. Ferrous sulfate（FeSO4·7H2O） as energy substrate was added into sludge Bioleaching systems with five different aeration rates were controlled under the same conditions: substrate dosage 10 g/L, temperature 25℃ and concentrations of sewage 12.3 g/L.The experimental results showed that the aeration rate controlled at 0.4 L/（min·L）was suitable. After three days’ operation, the removal rates of Cu, Zn and Cd in fresh sludge were 62.53%, 67.8% and 54.63% respectively. The residual contents of the three metals in treated sludge also accorded with the national criterion for sludge land use.
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Effect of aeration rate on bioleaching heavy metal from sewage sludge

  • Received Date: 07/02/2009
  • Accepted Date: 15/01/2009
Fund Project:

Abstract: In this research, sewage sludge taken from Guilin Wastewater Treatment Plant（WWTP） was selected as cultivation medium for the growth of Thiobacillus ferrooxidans. Ferrous sulfate（FeSO4·7H2O） as energy substrate was added into sludge Bioleaching systems with five different aeration rates were controlled under the same conditions: substrate dosage 10 g/L, temperature 25℃ and concentrations of sewage 12.3 g/L.The experimental results showed that the aeration rate controlled at 0.4 L/（min·L）was suitable. After three days’ operation, the removal rates of Cu, Zn and Cd in fresh sludge were 62.53%, 67.8% and 54.63% respectively. The residual contents of the three metals in treated sludge also accorded with the national criterion for sludge land use.

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