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Preliminary techno-economic analysis of three typical decentralized composting technologies treating rural kitchen waste: a case study in China

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Abstract

This study was designed to evaluate whether the decentralized rural kitchen waste (KW) composting technologies used in China can be widely applied. To this end, we completed a techno-economic analysis of three typical types of KW compositing, namely solar-assisted (SAC), bio-enhanced (BEC), and heat-dewatering composting (HDC). These evaluations revealed that all three technologies produce composting products that meet China’s organic fertilizer standard and that both SAC and BEC are economically self-sustaining and generate net profits (18824.94 and 17791.52 US$/a) and positive net present values (32133.11 and 25035.93 US$). Subsequent sensitivity analysis demonstrated that the KW-handling subsidy plays a critical role in making decentralized composting economically attractive. Based on these analyses, we believe that reducing the coverage area of SAC, reducing the operating cost of BEC and HDC, upgrading composting products, and strengthening secondary pollution control would aid in supporting the technological improvement of these processes. Moreover, providing appropriate subsidies and promulgating specific standards and policies for KW fertilizer are key strategies for decentralized rural KW composting management.

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Acknowledgements

This work was financially supported by the Zhejiang Province Key Research and Development Project (Nos. 2019C03006 and 2021C03024).

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Authors and Affiliations

  1. Institute of Environment Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China

    Haoshu Wang, Yong Qin, Liqing Xin, Changxun Zhao & Weixiang Wu

  2. Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Hangzhou, 310058, China

    Haoshu Wang, Yong Qin, Liqing Xin, Changxun Zhao & Weixiang Wu

  3. Zhejiang Transper Environmental Protection Technology Co., Ltd., Hangzhou, 310058, China

    Zhuang Ma & Jian Hu

Authors
  1. Haoshu Wang
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  2. Yong Qin
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  3. Liqing Xin
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  4. Changxun Zhao
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  5. Zhuang Ma
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  6. Jian Hu
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  7. Weixiang Wu
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Corresponding author

Correspondence to Yong Qin.

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Highlights

• Decentralized composting (DC) is a profitable KW treating technology.

• SAC and BEC were economically attractive in rural area, while HDC was unprofitable.

• KW handling subsidy plays a vital role in making DC profitable.

• SAC and BEC have great potential in promoting rural KW treatment.

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Wang, H., Qin, Y., Xin, L. et al. Preliminary techno-economic analysis of three typical decentralized composting technologies treating rural kitchen waste: a case study in China. Front. Environ. Sci. Eng. 17, 47 (2023). https://doi.org/10.1007/s11783-023-1647-7

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  • DOI: https://doi.org/10.1007/s11783-023-1647-7

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