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Peng Jie, Yuan Xingzhong, Jiang Hongwei, Huang Huajun, Bi Wenkai. Analysis on greenhouse gas emissions from different sewage sludge treatments and disposal processes[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2285-2290.
Citation: Peng Jie, Yuan Xingzhong, Jiang Hongwei, Huang Huajun, Bi Wenkai. Analysis on greenhouse gas emissions from different sewage sludge treatments and disposal processes[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2285-2290.
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Analysis on greenhouse gas emissions from different sewage sludge treatments and disposal processes

  • 1.

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

  • Received Date: 29/05/2012
    Accepted Date: 13/04/2012
    Available Online: 11/06/2013
    Fund Project:
  • At the present time, sanitary landfills, incineration and composting are the main disposal methods of sewage sludge. The discharge amount of greenhouse gases exhausted during disposing process was calculated and analyzed with the method and default value recommended by the IPCC model. The emitting ways of involving greenhouse gases included direct discharge, indirect discharge and alternative emission. CH4 was the gas considered during landfills process. And for the incineration and composting process, CO2 and N2O were involved. The emission of CH4 and N2O was converted to that of CO2. The net emissions of CO2 during sanitary landfills, incineration and composting processed were 695.847 kg CO2/t, 443.643 kg CO2/t, 511.817 kg CO2/t, respectively. Organic fertilizer obtained from sewage sludge composting can be reutilized. Therefore, composting may be a promising technology for sewage sludge disposal in view of carbon emission reduction and resource utilization.
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Analysis on greenhouse gas emissions from different sewage sludge treatments and disposal processes

  • Received Date: 29/05/2012
  • Accepted Date: 13/04/2012
  • Available Online: 11/06/2013
Fund Project:

Abstract: At the present time, sanitary landfills, incineration and composting are the main disposal methods of sewage sludge. The discharge amount of greenhouse gases exhausted during disposing process was calculated and analyzed with the method and default value recommended by the IPCC model. The emitting ways of involving greenhouse gases included direct discharge, indirect discharge and alternative emission. CH4 was the gas considered during landfills process. And for the incineration and composting process, CO2 and N2O were involved. The emission of CH4 and N2O was converted to that of CO2. The net emissions of CO2 during sanitary landfills, incineration and composting processed were 695.847 kg CO2/t, 443.643 kg CO2/t, 511.817 kg CO2/t, respectively. Organic fertilizer obtained from sewage sludge composting can be reutilized. Therefore, composting may be a promising technology for sewage sludge disposal in view of carbon emission reduction and resource utilization.

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