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Implementation effect of municipal solid waste mandatory sorting policy in Shanghai

Wang, Yao, Shi, Yu, Zhou, Jizhi, Zhao, Jun, Maraseni, Tek, Qian, Guangren·2021·Journal of Environmental Management
DOI 10.1016/j.jenvman.2021.113512
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Abstract

In Shanghai, the biggest metropolis in China, the source classification of domestic waste began in the 1990s but achieved little success over the past thirty years. Surprisingly, the compulsory classification provision of Shanghai residents' domestic waste since 2019 has been successful. In this work, the overall status, and challenges of municipal solid waste (MSW) management in Shanghai under compulsory waste sorting rules are investigated. We tracked the classification efficiency of municipal solid waste, physicochemical characteristics of separated waste, and the carbon emissions arising from waste disposal system. It was found that almost 83.62 % of household food waste has been effectively separated with high purity of 99.50 %, while the lower heating value (LHV) of residual waste was increased by 96.4 % compared to previous years. With effective waste classification, the net carbon emission of separated processing was reduced to 0.11 ton CE/ton waste. However, this system generated some negative outcomes as well such as the lower recovery value of metal in bottom ash and the higher chloride content in fly ash. Moreover, we have documented and discussed several challenges of sustainable waste management system in Shanghai in the text. In order to overcome those challenges, we recommend to: (i) establish a finer source separation and recycling system; (ii) develop highly-efficient resource recovery technologies of byproducts from waste disposal system; and (iii) propose…

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Metadata

Authors
Wang, Y., Shi, Y., Zhou, J., Zhao, J., Maraseni, T., & Qian, G.
Venue
Journal of Environmental Management
Publisher
Elsevier BV
Published
2021-11
Volume
298
Pages
113512
ISSN
0301-4797
DOI
10.1016/j.jenvman.2021.113512
Cited by
113
References
2
Language
en
Licence
Funders
National Key Research and Development Program of China (2019YFC1906900)

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