The role of lime in dredged mud dewatered by a plate and frame filter press and potential substitutes

Cui, Yan; Wang, Zhu; Wu, Sheng; Liu, Jiming; Hou, Hao; Lin, Naixi

doi:10.1007/s11356-020-12207-8

Cited by 23 publications

(9 citation statements)

References 25 publications

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“…As the design considered two levels for each continuous factor, a quadratic regression model was used. The predictive polynomial quadratic equation in general form is given by Equation (1).…”

Section: Samplingmentioning

confidence: 99%

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Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Matias Gonçalves,

Mendoza-Martinez,

Alves Rocha

et al. 2023

Energies

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Steel is a crucial industrial product with applications in various sectors, such as construction, engineering, and industry. However, the steel industry generates significant waste, contributing to greenhouse gas emissions and environmental challenges. To address this issue, incorporating solid waste, especially sludge with high moisture content, into the steel industry’s operations is essential. This study aimed to construct and test an active indirect solar dryer for reducing the moisture content of sludge from a steel drawing industry. By employing principles of the circular economy and the environmental, social, and governance concept, the drying process showed promising results, achieving approximately 42% moisture reduction. This study involved collection and characterization of industrial sludge, design and assembly of a hybrid active indirect solar dryer, fluid dynamic analysis of the behavior of the air inside the device through CFD Ansys software 2012, tests with a thermographic camera to validate the simulation, and optimization of the sludge drying by calculating the thermal efficiency and drying efficiency of the equipment. The adoption of such drying processes can lead to substantial cost reductions in the transportation, handling, and landfilling of steel-drawing sludge, promoting innovation and aiding global steel industries in achieving their solid waste disposal targets.

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Section: Samplingmentioning

confidence: 99%

“…Typically, excess water in the sludge is removed using a filter press, which is operated under plate and frame pressure (PFP). A feed pump capable of providing a feed pressure and an air compressor capable of providing a press pressure determine the efficiency of the water removal [1].…”

Section: Introductionmentioning

confidence: 99%

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Matias Gonçalves,

Mendoza-Martinez,

Alves Rocha

et al. 2023

Energies

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“…Reduce the generation of solid waste Using green building materials [17,18] Reduce the volume after solid waste generation Flocculation, sedimentation, and dewatering [19][20][21] Resource utilization…”

Section: Reductionmentioning

confidence: 99%

Characteristics and Resource Recovery Strategies of Solid Waste in Sewerage Systems

Lv²,

et al. 2023

Sustainability

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Sewerage systems-related solid waste accumulates in considerable quantities in urban water systems, including rainwater drainage pipes, pumping stations, grease traps, grit chambers, and septic tanks. Traditional management methods, such as sanitary landfilling, incineration, and composting, not only endanger the environment but also consume a significant amount of land. To address this problem, a variety of waste was collected from a terminal and different facilities in sewerage systems, and the characteristics of solid waste were tested and analyzed. The corresponding appropriate approaches to resource recovery strategies were proposed in detail. The solid waste in the wastewater treatment plant (WWTP) contains low organic matter content and a certain quantity of heavy metals, making recycling difficult. Before the solid waste enters the WWTP, the strategy of pre-sorting, treating, and recycling the solid waste is worth recommending. The waste was divided into three categories based on its nature, and corresponding resource utilization strategies were proposed. A small part of solid waste that is not suitable for pre-recycling can be discharged normally and enter the WWTP for treatment. This paper provides a scientific basis for the green resource utilization of solid waste in the field of sewerage systems in developing countries.

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“…The water content of sediment remains high after a short period of settling [ 13 , 16 ], resulting in poor mechanical properties and cannot be used as soil materials. In some projects, plate and frame filter presses have been used to dewater the slurry, which can greatly reduce the water content of slurry [ 17 , 18 ]. However, the dewatering efficiency of the filter press is low in some cases, and the problem of untimely treatment often occurs [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Research on Dewatering Characteristics of Waste Slurry from Pipe Jacking Construction

et al. 2022

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A large amount of waste slurry is produced during the construction of pipe jacking projects. To avoid the waste slurry occupying too much urban land, it needs to be rapidly reduced. Due to the complex composition of waste slurry, the existing dewatering methods face the problem of low efficiency, and the soil after dewatering is difficult to recycle as soil materials due to high water content and low strength. There is currently a lack of research on dewatering and resource utilization of waste slurry from pipe jacking projects. In response to this problem, this paper studies the flocculation-settling characteristics of waste slurry and the mechanical properties of solidified sediment. It was found that the anionic polyacrylamide (APAM) 7126 obtained the best separation effect if the waste slurry contains bentonite, which increases the zeta potential, resulting in poor separation. Thus, FeCl3·6H2O and APAM 7126 can be used as compound conditioners. The sediment after settling was further added with 20–30% sulphate aluminum cement (SAC), and the unconfined compressive strength of the solidified sediment for 3 days could exceed 30 kPa. After flocculation-settling and solidification treatment, the waste pipe jacking slurry can be quickly dewatered into a soil material with a certain strength, which provides a reference for engineering applications.

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The role of lime in dredged mud dewatered by a plate and frame filter press and potential substitutes

Cited by 23 publications

References 25 publications

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Characteristics and Resource Recovery Strategies of Solid Waste in Sewerage Systems

Research on Dewatering Characteristics of Waste Slurry from Pipe Jacking Construction

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