Understanding the interplay of sludge characteristics and dewatering in water treatment plants: a review

被引：0
作者：
Paffrath, Silvia F. [1 ]
Carissimi, Elvis [2 ]
Schner, Jéssica C. N. [1 ]
Ferrari, Keila F. H. [3 ]
Etchepare, Ramiro G. [4 ]
机构：
[1] Graduate Program in Water Resources and Environmental Engineering, Federal University of Paraná, Curitiba
[2] Department of Sanitary and Environmental Engineering, Federal University of Santa Maria, Santa Maria
[3] Graduate Program in Civil Engineering, Federal University of Santa Maria, Santa Maria
[4] Department of Hydraulics Sanitation, Federal University of Paraná, Curitiba
来源：
Environmental Technology Reviews | 2024年 / 13卷 / 01期
关键词：
Sludge management; sludge treatment; water treatment plant management; water treatment residuals;
D O I：
10.1080/21622515.2024.2428446
中图分类号：
学科分类号：
摘要：
In the realm of water supply and the management of residues arising from water treatment plants (WTP), an essential challenge lies in understanding and characterising sludge, and assessing whether these characteristics impact sludge dewatering, an essential step to reduce the management costs of these wastes. This review focuses specifically on the characterisation of sludge properties relevant to dewatering performance, addressing an underexplored aspect within recent literature on water treatment plant sludge (WTS). Unlike prior studies, which predominantly focus on sludge reuse after dewatering, this review systematically examines the direct correlations and interdependencies between sludge characteristics and dewatering outcomes, addressing gaps in literature. A bibliometric analysis of global WTS research revealed an annual average of fewer than 14 publications since 1957. Keywords related to sludge characteristics are notably scarce in connection with ‘dewatering’, highlighting a specific gap that this review aims to address. This review categorises sludge characteristics into ‘micro-properties’ and ‘macro-properties’, providing detailed descriptions of each. The latter primarily influence dewatering and are generally unmeasured in WTPs due to the inherent difficulties in their determination. However, it’s possible to derive macro-properties from micro-properties, establishing their relationship and subsequently selecting an appropriate dewatering technique. Main findings underscore direct proportionality between: viscosity (micro) and capillary suction time–CST (macro), solid concentration–SC (micro) and CST; and inverse proportionality between: SC and specific resistance to filtration–SRF (macro). These findings contribute a refined understanding of parameters affecting sludge dewatering processes, supporting further research focused on enhancing efficiency in WTS management. © 2024 Informa UK Limited, trading as Taylor & Francis Group.
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页码：794 / 813
页数：19
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