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Life-cycle environmental and cost impacts of reusing fly ash

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  • Huang, T.Y.
  • Chiueh, P.T.
  • Lo, S.L.

Abstract

Municipal solid waste incinerator (MSWI) fly ash, which includes residues collected from semidry scrubbers and bag filters, is a common hazardous waste that is difficult to recycle. We evaluate a novel application of the reuse of MSWI fly ash as a substitute alkali reagent in the Waelz process at an electric arc furnace (EAF) ash recycling plant because of its economical and environmental benefits. Life-cycle assessment and cost-benefit analysis were used to compare the application with other alternatives, namely, disposal in landfill after stabilization/solidification, reuse as part of raw material in a cement kiln, and reuse as part of aggregates in brick. Data from field experiments which were performed at a commercial EAF ash recycling plant in Taiwan were used for the evaluation. Our results show that the proposed application has the lowest environmental impact because the ZnO recycling of EAF ash is environmental friendly for reducing the excavation of zinc ore. In terms of economy, the higher sale price of the resulting cement product offers the best benefit among different applications in this research. After integration of environmental and economic effects, the application was still superior to the three alternatives. Although stabilization/solidification and subsequent disposal of MSWI fly ash is common practice, the scarcity of landfill sites and its volume leads to risks associated with operation of incinerators. Thus, finding multiple approaches to recycling of MSWI fly ash is necessary. This study provides a potential option for the recycling of MSWI fly ash and presents its environmental and economic benefits in management of fly ash from MSWIs.

Suggested Citation

  • Huang, T.Y. & Chiueh, P.T. & Lo, S.L., 2017. "Life-cycle environmental and cost impacts of reusing fly ash," Resources, Conservation & Recycling, Elsevier, vol. 123(C), pages 255-260.
    • Handle: RePEc:eee:recore:v:123:y:2017:i:c:p:255-260
    DOI: 10.1016/j.resconrec.2016.07.001
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    References listed on IDEAS

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    1. Samolada, M.C. & Zabaniotou, A.A., 2014. "Energetic valorization of SRF in dedicated plants and cement kilns and guidelines for application in Greece and Cyprus," Resources, Conservation & Recycling, Elsevier, vol. 83(C), pages 34-43.
    2. Leme, Marcio Montagnana Vicente & Rocha, Mateus Henrique & Lora, Electo Eduardo Silva & Venturini, Osvaldo José & Lopes, Bruno Marciano & Ferreira, Cláudio Homero, 2014. "Techno-economic analysis and environmental impact assessment of energy recovery from Municipal Solid Waste (MSW) in Brazil," Resources, Conservation & Recycling, Elsevier, vol. 87(C), pages 8-20.
    3. Yang, Rebekah & Kang, Seunggu & Ozer, Hasan & Al-Qadi, Imad L., 2015. "Environmental and economic analyses of recycled asphalt concrete mixtures based on material production and potential performance," Resources, Conservation & Recycling, Elsevier, vol. 104(PA), pages 141-151.
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    Cited by:

    1. Ning Yuan & Hao Xu & Yanjun Liu & Kaiqi Tan & Yixiang Bao, 2023. "Synthesis and Environmental Applications of Nanoporous Materials Derived from Coal Fly Ash," Sustainability, MDPI, vol. 15(24), pages 1-29, December.
    2. Oluwafemi E. Ige & Oludolapo A. Olanrewaju, 2023. "Comparative Life Cycle Assessment of Different Portland Cement Types in South Africa," Clean Technol., MDPI, vol. 5(3), pages 1-20, July.

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