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    • Physical Conditioning Methods for Sludge Deep Dewatering: A Critical Review

    Zhuo Liu,Fang Luo,Lingzhi He,Siqi Wang,Yi Wu,Zhuqi Chen

    Journal of Environmental Management（2024）

    Key Laboratory of Material Chemistry for Energy Conversion and Storage

    Cited 5|Views23
    Abstract
    Sludge is an inevitable waste product of sewage treatment with a high water content and large volume, it poses a significant threat of secondary pollution to both water and the atmosphere without proper disposal. In this regard, dewatering has emerged as an attractive method in sludge treatment, as it can reduce the sludge volume, enhance its transportability and calorific value, and even decrease the production of landfill leachate. In recent years, physical conditioning methods including non-chemical conditioners or energy input alone, have been extensively researched for their potential to enhance sludge dewatering efficiency, such as thermal treatment, freeze-thaw, microwave, ultrasonic, skeleton builders addition, and electro-dewatering, as well as combined methods. The main objective of this paper is to comprehensively evaluate the dewatering capacity of various physical conditioning methods, and identify key factors affecting sludge dewatering efficiency. In addition, future research anticipated directions and outlooks are proposed. This work is expected to provide valuable insights for developing efficient, eco-friendly, and low-energy consumption techniques for deep sludge dewatering.
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    Key words
    Sludge,Dewatering,Physical conditioning methods,EPS,Co-conditioning
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