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WANG Qian, YANG Fan, XU Qiyong. Effects of incineration bottom ash on geotextile scaling in landfills[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5262-5266. doi: 10.12030/j.cjee.201609165
Citation: WANG Qian, YANG Fan, XU Qiyong. Effects of incineration bottom ash on geotextile scaling in landfills[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5262-5266. doi: 10.12030/j.cjee.201609165
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Effects of incineration bottom ash on geotextile scaling in landfills

  • 1.

    Engineering Laboratory for Eco-Efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China

  • Received Date: 19/12/2016
    Accepted Date: 19/09/2016
    Available Online: 26/08/2017
    Fund Project:
  • With the increasing of waste incineration in China, more and more bottom ash has been generated annually. Currently, the most commonly used method for bottom ash is co-disposed with MSW in landfills, which may cause some potential environmental problems. Laboratory studies were conducted to explore the effect of co-disposed bottom ash on geotextile scaling in landfills. Different scenarios were simulated, including a fresh leachate (control group A), a fresh leachate with bottom ash (experimental group B), and ultra-pure water (blank group C). The results showed the geotextile in group B with bottom ash had more scale formation than that in group A, while the geotextile in group C didn't scaled. The addition of bottom ash increased calcium concentration in leachate from 2 407 mg·L-1 to 5 701 mg·L-1. The mass of geotextile in fresh leachate increased 0.02 g·cm-2 in day 20, while it increased 0.05 g·cm-2 in the group B. The results indicated that carbon dioxide in landfill gas reacted with the calcium ions in leachate, to large extent, resulting in geotextile scaling. In addition, the consumption of carbon dioxide indicated that the scaling rate was decreased over time. Results indicated that bottom ash co-disposed with MSW in landfills, to large extend, improve the risk of geotextile scaling.
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Effects of incineration bottom ash on geotextile scaling in landfills

  • Received Date: 19/12/2016
  • Accepted Date: 19/09/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: With the increasing of waste incineration in China, more and more bottom ash has been generated annually. Currently, the most commonly used method for bottom ash is co-disposed with MSW in landfills, which may cause some potential environmental problems. Laboratory studies were conducted to explore the effect of co-disposed bottom ash on geotextile scaling in landfills. Different scenarios were simulated, including a fresh leachate (control group A), a fresh leachate with bottom ash (experimental group B), and ultra-pure water (blank group C). The results showed the geotextile in group B with bottom ash had more scale formation than that in group A, while the geotextile in group C didn't scaled. The addition of bottom ash increased calcium concentration in leachate from 2 407 mg·L-1 to 5 701 mg·L-1. The mass of geotextile in fresh leachate increased 0.02 g·cm-2 in day 20, while it increased 0.05 g·cm-2 in the group B. The results indicated that carbon dioxide in landfill gas reacted with the calcium ions in leachate, to large extent, resulting in geotextile scaling. In addition, the consumption of carbon dioxide indicated that the scaling rate was decreased over time. Results indicated that bottom ash co-disposed with MSW in landfills, to large extend, improve the risk of geotextile scaling.

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