Comprehensive competitiveness assessment of four typical municipal sludge treatment routes in China based on environmental and techno-economic analysis

To find a sustainable and effective municipal sludge treatment route requires a systematic assessment of the comprehensive competitiveness of diverse sludge treatment routes. Four typical treatment routes in China including co-incineration in coal power plants (CIN), mono-incineration (IN), anaerobi...

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Veröffentlicht in:The Science of the total environment 2023-10, Vol.895, p.165123-165123, Article 165123
Hauptverfasser: Huang, Yanqin, Zhen, Yuhang, Liu, Lanling, Ning, Xiaoyang, Wang, Chenzhou, Li, Kai, Zhao, Li, Lu, Qiang
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Sprache:eng
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Zusammenfassung:To find a sustainable and effective municipal sludge treatment route requires a systematic assessment of the comprehensive competitiveness of diverse sludge treatment routes. Four typical treatment routes in China including co-incineration in coal power plants (CIN), mono-incineration (IN), anaerobic digestion (AD) and pyrolysis (PY) were selected in this study. A novel assessment model integrating life cycle assessment (LCA), techno-economic analysis (TEA) with analytic hierarchy process (AHP)-Entropy method was established, and comprehensive competitiveness indicated by comprehensive index (CI) of the four routes was deeply evaluated. Results displayed CIN route (CI = 0.758) showed the best comprehensive performance for its best environmental and economic performance. This was followed by PY route (CI = 0.691) and AD route (CI = 0.570), indicating the enormous potential of sludge PY technology. IN route showed the worst comprehensive performance (CI = 0.186) owing to its high environmental impact and lowest economic benefit. It was noted that greenhouse gas emissions and severe toxic potential were the main environmental challenges faced by sludge treatment. Besides, result of sensitivity analysis revealed that the comprehensive competitiveness of diverse sludge treatment routes was improved with the increase of sludge organic content and sludge reception fee. [Display omitted] •An assessment model integrating LCA, TEA and AHP-Entropy method was established.•Comprehensive Competitiveness of four typical sludge treatment routes was assessed.•CIN and PY routes performed better owing to energy recovery and product output.•IN and AD routes performed poor due to high economic and environmental burden.•Sensitivity of sludge organic content and reception fee was evaluated.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.165123