Optimization of electro-dewatering performance of oily sludge by voltage control and coal-powdered activated carbon (CPAC) addition

Li, Chen; Zhao, Miaomiao; Ma, Degang; Jia, Xiaoyu; Zhang, Fan

doi:10.1016/j.jclepro.2023.139111

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…Additionally, several studies have shown that electro-dewatering can be an effective method for improving sludge dewatering efficiency [3]. They used a vertical electric field for sludge electro-dewatering and applied pressure on the anode plate to perform a pressurized electro-dewatering process [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Application and Parameter Optimization of Electro-Kinetic Geosynthetics Electrodes Based on the Wild Horse Optimizer in Horizontal Electric Field Sludge Dewatering

Shen,

Wang,

Yan

et al. 2024

Water

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This study systematically compared the performance of five corrosion-resistant electrode materials for electro-dewatering. Through a comprehensive analysis of dewatering efficiency, energy consumption, and corrosion resistance, conductive plastic composite electrodes (EKG) were selected as the optimal electrode material for experimentation. Additionally, the impact of electric field strength and electrode spacing on the efficiency and energy consumption of electro-dewatering (EDW) was investigated. The results showed that the increase in electric field intensity could improve the solid content and dewatering efficiency of the sediments, but the corresponding energy consumption also increased. The increased spacing of the plates reduced the dehydration effect and increased the energy consumption. By employing the Wild Horse Optimization algorithm, empirical and multifactorial response models for the dewatering solidification process were established, aimed at predicting the dewatering performance and energy consumption. The study concludes that for the remediation of heavy metals, the electric field strength should not exceed 10 V/cm to avoid excessive heavy metal migration and potential adverse chemical reactions.

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Section: Introductionmentioning

confidence: 99%

Application and Parameter Optimization of Electro-Kinetic Geosynthetics Electrodes Based on the Wild Horse Optimizer in Horizontal Electric Field Sludge Dewatering

Shen,

Wang,

Yan

et al. 2024

Water

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“…This growth has led to an increase in the production of cold rolling oily sludge (CROS), a hazardous waste generated during steel production . According to research and production data, each ton of hot-rolled steel produces 0.9 kg of oily sludge, while each ton of cold-rolled steel produces 0.27 kg of oily sludge. , In 2019, approximately 53.74 million tons of cold-rolled steel was produced in China, which resulted in the generation of 14,511 tons of CROS . CROS is regarded as a hazardous waste and includes a variety of components such as iron oxide, coolant, and lubricants that have adverse effects on human health and environmental sustainability.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Approaches to Oily Sludge Management in Chinese Megacities

Ji,

Guan,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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Cold rolling oily sludge from the steel rolling process is considered hazardous waste and contains significant iron oxides and lubricants. The main component is 61.7% light oil, which is pyrolyzed at approximately 430 °C. Resource utilization is identified as a key pathway toward achieving sustainable disposal of cold rolling oily sludge. Prior researches on environmental assessment have been conducted for oilfield oily sludge disposal, applying these results to steel rolling oily sludge disposal may be biased, and the coking synergistic process for steel rolling oily sludge is in the pilot stage. Hence, focusing on the emerging technology of coking synergistic, the environmental impacts and economic feasibility of coking synergistic technology and the other two technologies (distillation-incineration and conventional incineration) were analyzed via life cycle assessment (LCA) and net present value methods. The results show that coking synergistic technology excelled in reducing environmental impacts, with a CO 2 emission reduction exceeding 35.7%. Furthermore, coking synergistic technology breaks even within three months with a profit of 2260 CNY per ton. Further exploration of the potential for the diffusion of coking synergies (CS) in the provinces was carried out, and four alternatives to coking synergies were designed with different market shares (0, 10, 20, and 30%). The results indicate that cold rolling oily sludge disposal in Hebei Province contributes 37% of the national CO 2 eq emissions. When coking synergistic technology becomes the primary alternative to hazardous waste incineration, national CO 2 emissions are expected to be reduced by 26.7%. Considering that coking synergistic technology must be dependent on the steel plant, adopting coking synergistic technology for suitable steel plants not only optimizes the utilization of cold rolling oily sludge waste resources but also significantly improves environmental performance.

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Sludge-derived biochar improves sludge electro-dewatering performance: Conductivity analysis

Yang,

Ma,

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Optimization of electro-dewatering performance of oily sludge by voltage control and coal-powdered activated carbon (CPAC) addition

Cited by 6 publications

References 48 publications

Application and Parameter Optimization of Electro-Kinetic Geosynthetics Electrodes Based on the Wild Horse Optimizer in Horizontal Electric Field Sludge Dewatering

Application and Parameter Optimization of Electro-Kinetic Geosynthetics Electrodes Based on the Wild Horse Optimizer in Horizontal Electric Field Sludge Dewatering

Sustainable Approaches to Oily Sludge Management in Chinese Megacities

Sludge-derived biochar improves sludge electro-dewatering performance: Conductivity analysis

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