Review on solid-liquid separation using various conditioning methods

Rashmi, H.R.; Devatha, C.P.

doi:10.1088/1757-899x/1166/1/012002

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…66 Only through high temperature, flocculation, chemical oxidation, biodegradation, and other conditioning methods to modify and adjust the sludge, or by destroying the structure of the sludge cell and EPS, can the bound water be transformed into free water, to attain the purpose of deep dehydration. 67 In recent years, many useful conditioning methods have been employed to alter the physicochemical properties of sludge, for achieving an effective reduction of volume and contributing to the subsequent utilization of resources. 68 The commonly used methods of sludge modification are the physical method, chemical method, biological method, and hybrid conditioning method.…”

Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

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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Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

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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“…The process of sediment framework construction has attracted attention due to its ability to directly modify the physical properties (compressibility and permeability) of the sediment cake through the addition of inert rigid materials. With in-depth research, scientists have found that these materials show greater potential in terms of preparation and transportation costs, environmental friendliness, and waste recycling [16]. Thanks to this, frame construction has gained significant development in recent years.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Addition of Cement and Zeolite on the Increase in the Efficiency of Sewage Sludge Dewatering in the Pressure Filtration Process

Kowalczyk

2024

Energies

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The process of removing water from sewage sludge is particularly important due to its high content in the raw sludge. This translates into problems with the transport and storage of sediments. Additionally, high water content reduces the calorific value of the sludge. The methods for selecting the appropriate parameters for sewage sludge conditioning and filtration, based on the experimental data presented in this work, may allow for the optimization of sludge dewatering lines in small and large sewage treatment plants. The optimization of the dewatering process has a significant impact on the environmental and economic benefits, which consequently results in a decrease in the power costs of the devices used, flocculants, and sludge processing, and, above all, it contributes to the reduction in the negative impact on the environment. The use of mineral substances in the preparation of sewage sludge improves the effects of its dewatering in the pressure filtration process, as expressed in the obtained values of the final hydration and process efficiency. The use of polyelectrolytes alone significantly improves the effects of sewage sludge dewatering. In this work, the polyelectrolytes were supported by the addition of cement or zeolite. The conditioning of sewage sludge in combined methods using C-494 polyelectrolyte and minerals made it possible to reduce the compressibility coefficient to the range of 0.24–0.47 and, at the same time, to achieve the best results of sludge dewatering in the filtration process. The lowest hydration of 74.9% was achieved when polyelectrolyte and cement were added to the sludge, and this hydration was 6.5 percentage points lower compared to that of the non-filtered sludge.

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Study on knitted filled knits for fruit juice filtering

Yunusova

Rakhimov

Zhabiev

2021

IOP Conf. Ser.: Earth Environ. Sci.

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This article discusses the essence of the formation of knitted filled filter cloths, in which the mass fraction of the filler exceeds more than 50% of the total surface density. The new method was tested in the production environment of the ‘Gani Rakhimov Ishonch’ enterprise (Samarkand) by modernizing the existing equipment, and also a pilot batch of products and final products were produced for filtering fruit juices.

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Review on solid-liquid separation using various conditioning methods

Cited by 3 publications

References 16 publications

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

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

The Influence of the Addition of Cement and Zeolite on the Increase in the Efficiency of Sewage Sludge Dewatering in the Pressure Filtration Process

Study on knitted filled knits for fruit juice filtering

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