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Dechlorination of Municipal Solid Waste Incineration Fly Ash by Leaching with Fermentation Liquid of Food Waste

Author

Listed:
  • Dezhi Zou

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Xiaona Wang

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Chuanfu Wu

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
    Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Teng Li

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Menglu Wang

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Shu Liu

    (Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, China)

  • Qunhui Wang

    (Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
    Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China)

  • Takayuki Shimaoka

    (Department of Urban and Environmental Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan)

Abstract

Cement kiln collaborative disposal of municipal solid waste incineration (MSWI) fly ash (referred to as fly ash) can achieve harmless recycling of fly ash. However, because of high chlorine (Cl) content in fly ash, the practical application of this technology is seriously restricted. In order to find a suitable leaching solvent for dechlorination of fly ash, this study compared the effect of lactic acid fermentation liquid (FL) and sludge FL of food waste on dechlorination. Results show that 90% of water-insoluble Cl in fly ash can be removed by a three-step leaching process with lactic acid FL and sludge FL, and the Cl content in leached fly ash residue is 0.44% and 0.39%, respectively. According to calculation, permissible fraction of the residue after three-step leaching with addition of lactic acid FL and sludge FL in kiln is 4.28% and 4.99% higher than that of the residue after three-step leaching with pure water, respectively. Furthermore, the properties of leaching solvents after leaching experiments indicate that organic acids with low pH value and high concentration are more conducive for removal of water-insoluble Cl. Therefore, it is feasible to use two kinds of FL as leaching solvent for fly ash dechlorination.

Suggested Citation

  • Dezhi Zou & Xiaona Wang & Chuanfu Wu & Teng Li & Menglu Wang & Shu Liu & Qunhui Wang & Takayuki Shimaoka, 2020. "Dechlorination of Municipal Solid Waste Incineration Fly Ash by Leaching with Fermentation Liquid of Food Waste," Sustainability, MDPI, vol. 12(11), pages 1-11, May.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:11:p:4389-:d:363627
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    References listed on IDEAS

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    1. Peng Xu & Qingliang Zhao & Wei Qiu & Yan Xue & Na Li, 2019. "Microstructure and Strength of Alkali-Activated Bricks Containing Municipal Solid Waste Incineration (MSWI) Fly Ash Developed as Construction Materials," Sustainability, MDPI, vol. 11(5), pages 1-12, March.
    2. Charles H. K. Lam & Alvin W. M. Ip & John Patrick Barford & Gordon McKay, 2010. "Use of Incineration MSW Ash: A Review," Sustainability, MDPI, vol. 2(7), pages 1-26, July.
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