Influencing factors and technology application advances in urban sludge conditioning and dewatering

LIU Bo; ZHANG Yibiao; HUANG Kaiwen; WANG Shuo; LI Ji

doi:10.13205/j.hjgc.202506005

Volume 43 Issue 6

Jun. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(6): 41-50

LIU Bo, ZHANG Yibiao, HUANG Kaiwen, WANG Shuo, LI Ji. Influencing factors and technology application advances in urban sludge conditioning and dewatering[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(6): 41-50. doi: 10.13205/j.hjgc.202506005

Citation:

LIU Bo, ZHANG Yibiao, HUANG Kaiwen, WANG Shuo, LI Ji. Influencing factors and technology application advances in urban sludge conditioning and dewatering[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(6): 41-50. doi: 10.13205/j.hjgc.202506005

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Influencing factors and technology application advances in urban sludge conditioning and dewatering

doi: 10.13205/j.hjgc.202506005

LIU Bo¹,
ZHANG Yibiao²,
HUANG Kaiwen²,
WANG Shuo^{2,3
,
,},
LI Ji^2,3

1. Wuxi Taihu Lake Restoration Co., Ltd., Wuxi 214000, China;
2. Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China;
3. Jiangsu College Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, China

Received Date: 2025-02-12
Accepted Date: 2025-05-25
Rev Recd Date: 2025-05-11

Abstract

Abstract

With the increase in China's sewage treatment capacity， the amount of residue sludge generated during the wastewater treatment process has also been increasing gradually. The issue of sludge treatment urgently needs to be addressed， and sludge dewatering is a key link. The high water content in sludge brings many difficulties to subsequent treatment and increases treatment costs. This paper provides a comprehensive overview of sludge dewatering technologies， including mechanical dewatering and sludge drying， while analyzing the advantages and disadvantages in practical applications. A systematic study was conducted to investigate the factors affecting sludge dewatering performance， clarifying the action mechanisms of various factors， including extracellular polymeric substances （EPS） and colloidal particles. In addition， the physical， chemical， and biological conditioning methods and their effects were comprehensively introduced. For each method， multiple application methods and their effects were listed， providing a comprehensive reference for sludge treatment. On this basis， future directions for sludge dewatering were prospected with a focus on resource utilization and low-carbonization， mainly including technological innovation and collaborative treatment， aiming to provide a reference for sludge treatment and promote the sustainable development in sludge treatment and disposal.
- urban sludge,
- sludge dewatering,
- influencing factors,
- deep dewatering,
- sludge conditioning

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References(49)

References

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