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Comparative study on the efficiency and environmental impact of two methods of utilizing polyvinyl chloride waste based on life cycle assessments

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Abstract

Two processes of utilizing polyvinyl chloride (PVC) waste, an incineration process and a vacuum pyrolysis process, for energy conversion were compared to determine their efficiency and environmental performance. We carried out a life cycle assessment with each of the two processes to evaluate their environmental impact and defined the goals and limits of our remit. As well, we established an inventory of PVC waste from incineration and vacuum pyrolysis based on process analysis, data collection and calculations. The results show that electrical power output per unit mass of PVC waste in the incineration process was twice as high as that of the vacuum pyrolysis process. Incineration had a larger total environmental impact potential than vacuum pyrolysis. The total environmental impact potential of PVC waste from incineration was three times higher than that from vacuum pyrolysis. Incineration of PVC disposed 300 ng·100 kg−1 of dioxins and vacuum pyrolysis 98.19 ng·100 kg−1 of dioxins. As well, we analyzed the data for their uncertainty with results quantified in terms of three uncertainties: basic uncertainty, additional uncertainty, and computational uncertainty. The coefficients of variation of the data were less than 25% and the quality of the inventory data was acceptable with low uncertainty. Both PVC waste disposal processes were of similar quality and their results comparable. The results of our life cycle impact assessment (LCIA) showed considerable reliability of our methodology. Overall, the vacuum pyrolysis process has a number advantages and greater potential for development of PVC disposal than the incineration process.

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Authors and Affiliations

  1. School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China

    Yuehui Wu & Dezhi Sun

  2. Environmental Monitoring Center of Heilongjiang Province, Harbin, 150056, China

    Guoliang Wang & Ping Gu

  3. College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China

    Zhen Wang, Yi Liu & Dezhi Sun

Authors
  1. Yuehui Wu
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  2. Guoliang Wang
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  3. Zhen Wang
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  4. Yi Liu
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  5. Ping Gu
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Correspondence to Yuehui Wu.

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Wu, Y., Wang, G., Wang, Z. et al. Comparative study on the efficiency and environmental impact of two methods of utilizing polyvinyl chloride waste based on life cycle assessments. Front. Environ. Sci. Eng. 8, 451–462 (2014). https://doi.org/10.1007/s11783-013-0614-0

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  • DOI: https://doi.org/10.1007/s11783-013-0614-0

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