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Cheng Guodan, Huang Qing, Zhang Kaisong. Effect of temperature and duration of pyrolysis on properties of bio-dried sludge biochar[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 1133-1138.
Citation: Cheng Guodan, Huang Qing, Zhang Kaisong. Effect of temperature and duration of pyrolysis on properties of bio-dried sludge biochar[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 1133-1138.
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Effect of temperature and duration of pyrolysis on properties of bio-dried sludge biochar

  • 1.

    Institute of Urban Environment,Chinese Academy of Sciences, Xiamen 361021, China

  • 2.

    Graduate University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 08/11/2011
    Accepted Date: 14/09/2011
    Available Online: 18/03/2013
    Fund Project:
  • Converting sewage sludge to biochar is one of the potential ways for sludge recycling. However, significant differences of the yields and properties of biochar were observed due to the properties of raw materials or pyrolysis conditions. The aim of this study is to systematically investigate the effect of pyrolysis conditions, such as temperature and duration, on the properties of the bio-dried sludge biochar. The results showed that the yields of biochar decreased with the increasing the temperature and duration. Biochar produced at 300℃ was acid while it was alkaline at 700℃. The content of nitrogen in biochar was found to decrease whereas P, K and the other micronutrients increased with the increasing pyrolysis temperature or duration. The result of DTPA extraction showed that the high temperature significantly reduced the bioavalability of trace element.
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Effect of temperature and duration of pyrolysis on properties of bio-dried sludge biochar

  • Received Date: 08/11/2011
  • Accepted Date: 14/09/2011
  • Available Online: 18/03/2013
Fund Project:

Abstract: Converting sewage sludge to biochar is one of the potential ways for sludge recycling. However, significant differences of the yields and properties of biochar were observed due to the properties of raw materials or pyrolysis conditions. The aim of this study is to systematically investigate the effect of pyrolysis conditions, such as temperature and duration, on the properties of the bio-dried sludge biochar. The results showed that the yields of biochar decreased with the increasing the temperature and duration. Biochar produced at 300℃ was acid while it was alkaline at 700℃. The content of nitrogen in biochar was found to decrease whereas P, K and the other micronutrients increased with the increasing pyrolysis temperature or duration. The result of DTPA extraction showed that the high temperature significantly reduced the bioavalability of trace element.

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