Screening and evaluation of green and low-carbon technologies for urban sewage sludge treatment in the Yangtze River Basin

WANG Zilin; LIN Bingquan; LIU Yuxin; SUN Dezhi

doi:10.13205/j.hjgc.202509022

Volume 43 Issue 9

Sep. 2025

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WANG Zilin, LIN Bingquan, LIU Yuxin, SUN Dezhi. Screening and evaluation of green and low-carbon technologies for urban sewage sludge treatment in the Yangtze River Basin[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 219-230. doi: 10.13205/j.hjgc.202509022

Citation:

WANG Zilin, LIN Bingquan, LIU Yuxin, SUN Dezhi. Screening and evaluation of green and low-carbon technologies for urban sewage sludge treatment in the Yangtze River Basin[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 219-230. doi: 10.13205/j.hjgc.202509022

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Screening and evaluation of green and low-carbon technologies for urban sewage sludge treatment in the Yangtze River Basin

doi: 10.13205/j.hjgc.202509022

1. Beijing Key Laboratory of Water Pollution Source Control Technology, Pollution Source Control and Ecological Restoration Technology Beijing Higher Education Engineering Research Center, Beijing 100083, China

Received Date: 2025-04-29
Available Online: 2025-11-05
Publish Date: 2025-09-01

Abstract

Abstract

The research hotspot analysis of sewage sludge treatment technologies was carried out to provide a basis for the construction of an urban sewage sludge green and low-carbon treatment technology library. Then， a technology evaluation index system was constructed according to the characteristics and needs of the Yangtze River Basin， and the technologies in the library were evaluated using the AHP-TOPSIS （analytic hierarchy process-technique for order of preference by similarity to ideal solution） method. Forty-six green and low-carbon treatment technologies for urban sewage sludge in the Yangtze River Basin were screened out， and seven excellent technologies with application cases were analyzed. The results show that excellent sewage treatment technologies exhibit similar performance in indicators such as COD and TP reduction rates， carbon emission intensity， etc.， but differ in advancedness， TN reduction rate， investment and construction costs. Some technologies still have room for improvement and upgrading. For residual sludge treatment， excellent technologies show similar levels in advancedness， applicability， and investment and construction costs， but significant differences exist in indicators such as dewatering rate and the land area occupied by sludge treatment. The technical evaluation results show that： A²O and oxidation ditch are the best for sewage treatment， MBR， artificial wetland comes second； the anaerobic digestion process is optimal in sludge treatment， followed by aerobic composting and sludge dewatering. The research results can provide technical references for pollution reduction and carbon emission synergies in urban sewage treatment plants in the Yangtze River Basin.
- Yangtze River Basin,
- sewage sludge treatment,
- green and low carbon,
- technology screening,
- AHP-TOPSIS method

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