Separation of Oil Phase from Dilute Oil/Water Emulsion in Confined Space Apparatus

Wang, Shuo; Qin, Wei; Dai, Yiyang

doi:10.1016/s1004-9541(12)60384-x

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Industrial effluent streams often have droplet of sizes <10 μm with narrow size distribution. 143,158 The stirring time plays an important role in obtaining the required size and distribution of the oil droplets than the stirring rate. 26,99,159,160 If the stirring time is low, that is, <2 min, it leads to the larger size of bimodal distribution, and if it is >10 min, it leads to the narrow distribution of droplet size ranging between 1 and 10 μm in diameter.…”

Section: Factors Affecting the Performance Of Coalescence Filtration ...mentioning

confidence: 99%

“…161 Therefore, they don’t spread quickly on the fibers reducing the separation efficiency. 158 Oil droplets smaller than 10 μm are almost spherical in shape and make point contact with fiber rather than on multiple fibers. The oil droplets larger than 10 μm deform easily under hydrodynamic forces to allowing high contact areas with several fibers.…”

Section: Factors Affecting the Performance Of Coalescence Filtration ...mentioning

confidence: 99%

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Fibrous coalescence filtration in treating oily wastewater: A review

Singh

Mukhopadhyay

Rengasamy

2021

Journal of Industrial Textiles

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Many industries discharge oil-in-water emulsion in the waste stream, often above the permissible limit causing serious environmental hazards. Porous media such as membrane and coalescence beds are employed to treat oily wastewater. A coalescence bed filter consists of either fibrous or granular packing and is used for removing larger oil droplets less than 100 μm from secondary emulsions. Fibrous media have higher porosities and specific surface areas than coarse granular media and hence give higher oil removal efficiency. To design an efficient fibrous coalescence bed filter for treating industrial discharge, understanding the mechanism of oil separation is important. This involves the surface wettability of fibers relating to surface chemistry and roughness. Further, fiber diameter, filter bed’s height, porosity, and pore size in relation to the oil droplet size and throughput and influent oil concentration are interactive parameters that affect the efficiency of coalescence. The performance of coalescence filtration is evaluated by analyzing the oil concentrations and D50 droplet sizes in the influent and effluent. In this article, the above-mentioned subjects are comprehensively reviewed from the reported research works, which highlights the complex nature of fibrous coalescence filtration.

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Section: Factors Affecting the Performance Of Coalescence Filtration ...mentioning

confidence: 99%

Section: Factors Affecting the Performance Of Coalescence Filtration ...mentioning

confidence: 99%

Fibrous coalescence filtration in treating oily wastewater: A review

Singh

Mukhopadhyay

Rengasamy

2021

Journal of Industrial Textiles

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“…The stability of the microemulsion is mainly affected by physicochemical properties of aqueous raffinate and organic chemicals, operating conditions, and surfactants in the extraction system. Among these factors the physicochemical properties of organic chemicals plays a key role, and the surfactant structure and content is also a key factor [4][5][6][7]. Extraction-stripping loop has a significant impact on these factors, so it is of great importance to study organic chemicals entrainment behavior and its mechanism related to extraction-stripping loops.…”

Section: Introductionmentioning

confidence: 99%

Effects of Copper Extraction-Stripping Loops on Entrainment in Aqueous Raffinate

Liu

et al. 2014

AMR

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Effects of extraction-stripping loops of organic phase on organic chemical entrainment in the aqueous raffinate in copper solvent extraction were studied in this paper. Results demonstrated that the total amount of organic chemicals lost in the aqueous raffinate decreased with the increase of times of extraction-stripping loops but reached largest at third loop. Entrainment was the dominate way of organic chemicals losing in the aqueous raffinate at early stage of the loops. The formation of entrainment and its stabilization mechanism was also studied. The average size of entrained droplet trended to increase with extraction-stripping loops increasing. Meanwhile, the absolute value of zeta potential trended to decrease. The surface tension of the aqueous raffinate increased after reaching the minimum value 41.3 mN/m at the 3rd loop. It showed that the formation of entrained droplets and its stability were mainly affected by the surface tension of aqueous raffinate.

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