Removal of oil from stable oil-water emulsion by induced air flotation technique

El-Kayar, A.; Hussein, Mohamed; Zatout, A. A.; Hosny, A. Y.; Amer, Amer

doi:10.1016/0956-9618(93)80003-a

Cited by 65 publications

(26 citation statements)

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“…By adding 3.5% (wt) NaCl to the synthetic oily water samples, we simulated the salinity of an oil-spill emulsion in seawater. Addition of NaCl has 2 effects: It decreases the diameter of the gas bubbles; consequently, an enhanced attachment between gas bubbles and oil droplets occurs (21). Second, a reduction in power consumption is obtained as a result of the increased emulsion conductivity caused by the NaCl ions present.…”

Section: Continuous Runsmentioning

confidence: 98%

Utilization of Electroflotation in Remediation of Oily Wastewater

Ibrahim

Mostafa

Fahmy

et al. 2001

Separation Science and Technology

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This paper deals with removal of finely dispersed oil from oil-water emulsions of different Egyptian oil crudes by either batchwise or continuous processes. Experiments were carried out in electroflotation cells equipped with a set of electrodes mounted in the cell bottoms. The effect of various operating and design parameters was studied. The recommended conditions for operating batch runs were as follows: current density from 5 to 20 mA/cm 2 , pH ϭ 6, and temperature from 30 to 40°C. According to the data obtained from continuous runs, at almost complete separation of oil, the minimum power consumption was 0.08 kWh/m 3 of a 200 mg/L emulsion flowed at 300 mL/min.

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Section: Continuous Runsmentioning

confidence: 98%

Utilization of Electroflotation in Remediation of Oily Wastewater

Ibrahim

Mostafa

Fahmy

et al. 2001

Separation Science and Technology

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“…[6,7] But most of these conventional methods cannot efficiently remove micron or submicron sized oil droplets. [8][9][10][11][12] Hempoonsert used thermal demulsification of crude oil emulsion in water but this method could not be a proper technique for all emulsions as its thermal degradation effects and hard temperature control. [8] For chemical demulsification, demulsifier agent and its fraction must be known but it was depended on lots of parameters such as oil phase and its concentration in emulsion.…”

Section: Introductionmentioning

confidence: 99%

“…[10] El-Kayar et al developed an air flotation system in which chemical agents were used for further demulsification but the maximum amount of oil they could be removed was less than 50%. [11] During the past few decades, the ability of low intensity ultrasonic standing wavefields to separate small particles from liquid suspensions has been widely used for different papers. [13,14] But only a few works have been reported oil= water emulsion separations.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Oil-Water Emulsion Separation in Ultrasound Standing Wavefield by Neural Network

Nasiri

Mosavian

Kadkhodaee³

et al. 2013

Journal of Dispersion Science and Technology

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A new approach has been introduced for separation of oil-in-water emulsion by using ultrasound standing wavefield. A neural networks model was used to simulate changes in the size of droplet during treatment. Model outputs were then validated and generalization capability was evaluated. For each network, the optimum values of isotropic spread were obtained by minimizing the root mean square error and maximizing the corresponding coefficient. It was found that the predicted values were in good agreements with experimental results. Also, increasing voice speed was demonstrated to predict size of emulsion particles more efficiently and accurately.

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“…However, these methods are limited by their large footprints, low efficiency in treating emulsified oil-water mixtures, complicated instrument setup and high energy usage [5][6][7][8][9]. Thus, considerable research efforts have been carried out to develop lower-cost and more effective oil-water separation strategies.…”

Section: Introductionmentioning

confidence: 99%