Applying ultrasound plus electrokinetics to enhance sludge dewatering

Dey, Arup Ratan; Nekrasevits, Andrei; Semken, R. Scott; Mikkola, Aki; Sihvonen, Tuomas

doi:10.1080/07373937.2021.1989460

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…Ultrasonic wave technology, known for its non-harsh conditions, short action time, and simplicity of operation, has gained recognition as a new water treatment method [12] , [13] , [14] . In various fields, ultrasound has been successfully applied to improve sludge dewatering performance, promote coal and food drying, amongst other applications [15] , [16] , [17] , [18] .…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the dewatering performance of zinc smelting iron Slag: Investigating the influence of ultrasonic Time, ultrasonic Power, and Liquid-Solid ratio using response surface methodology

Cheng,

Dai,

Zhang

et al. 2024

Ultrasonics Sonochemistry

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Section: Introductionmentioning

confidence: 99%

“… •SDG-9: Build disaster-resilient infrastructure, promote inclusive and sustainable industrialization, and drive innovation. Target 9.3 Finland [12] The moisture content of the iron slag filter cake needs to be reduced. The variation in water content of iron slag filter cake was investigated under different conditions.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the dewatering performance of zinc smelting iron Slag: Investigating the influence of ultrasonic Time, ultrasonic Power, and Liquid-Solid ratio using response surface methodology

Cheng,

Dai,

Zhang

et al. 2024

Ultrasonics Sonochemistry

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“…This hybrid conditioning method applies ultrasound (US) and electrokinetics (EK) to enhance sludge dewatering. The experimental apparatus is shown in Figure . Preconditioning with ultrasound could break down flocs and microbial cells.…”

Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

confidence: 99%

“…The experimental apparatus is shown in Figure 16. 190 Preconditioning with ultrasound could break down flocs and microbial cells. The applied voltage of the electrolysis pretreatment helps to drive free water through the filtration material.…”

Section: Advanced Oxidation Process (Aop)mentioning

confidence: 99%

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Jiang

Gao

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Municipal sludge is an inevitable byproduct during the treatment of wastewater, which is produced by sewage treatment plants in urban residential areas, and it contains pathogens, heavy metals, and other pollutants. Municipal sludge is suitable for application in energy utilization because of its high organic content and relatively low toxic matter. The high moisture content of municipal sludge brings huge difficulties to its harmless disposal and resource utilization. At present, the main method used for sludge dehydration is mechanical dewatering. However, the mud cake produced by this method still has a water content of up to 80%, which does not meet the current rigorous requirements. Therefore, the development of deep dehydration technology for sludge is imperative. In this paper, the basic properties and structure of sludge were summarized. As a key component of sludge flocs, extracellular polymeric substance (EPS) has received much attention in sludge dewatering conditioning. Meanwhile, the influencing factors of sludge dewatering were also fully elaborated, including sludge types, sewage hardness, surface charge, size distribution, and sludge viscosity. And the main methods of sludge dewatering treatment were comprehensively included, namely, the physical method, chemical method, biological method, and combined conditioning methods. The advantages and disadvantages of each method are mentioned, and their application situations were analyzed. Furthermore, comment was provided on the conditioning mechanism, adaptability, prospects, and limitations of the techniques for improving sludge dewatering. This systematic review related to sludge dewatering can not only provide reference information for the conditioning method but also benefit the exploitation of efficient and ecofriendly sludge dewatering technology.

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A review on the recent advances in electrochemical treatment technologies for sludge dewatering and alternative uses

Rumky

Deb

Shim

et al. 2023

Journal of Hazardous Materials Advances

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Applying ultrasound plus electrokinetics to enhance sludge dewatering

Cited by 7 publications

References 37 publications

Optimizing the dewatering performance of zinc smelting iron Slag: Investigating the influence of ultrasonic Time, ultrasonic Power, and Liquid-Solid ratio using response surface methodology

Optimizing the dewatering performance of zinc smelting iron Slag: Investigating the influence of ultrasonic Time, ultrasonic Power, and Liquid-Solid ratio using response surface methodology

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

A review on the recent advances in electrochemical treatment technologies for sludge dewatering and alternative uses

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