Colloid-Enhanced Ultrafiltration of Canola Oil: Effect of Process Conditions and MWCO on Flux, Fouling and Rejections

Abstract

In the present work, the efficiency of colloid‐enhanced ultrafiltration (CEUF) of canola oil miscella was investigated using an anionic surfactant (sodium dodecyl sulfate salt [SDS]), chelating agent (ethylenediaminetetraaceticacid [EDTA]), salt (calcium chloride [CaCl2]) and two molecular weight cutoffs of hydrophobic (polyvinylidene fluoride) membranes (50 and 100 kDa). There were thicker fouled layer on both membrane surfaces for SDS‐ and EDTA‐pretreated samples. The flux reduction of M116 membrane was more than M183 membrane with the all samples except SDS added ones. It was observed that CEUF of EDTA‐ and SDS‐pretreated samples exhibited high efficiency in removing phosphorus. Increasing temperature from 25 to 55C improved the steady‐state permeate flux of SDS‐pretreated samples to extent of 13 kg/m2h. Furthermore, increasing pressure led to increase the permeate flux of pretreated sample except CaCl2 adding ones. Practical Application The small size of impurities of crude vegetable oils is a challenge of membrane refining, so increasing their size as a micelle or colloid by adding chemical agents may improve the separation. The knowledge of chemical agents behavior in relation to impurities as well as their impact on membrane performance such as flux, fouling and rejection will be benefit to decide for industrial applications. Also the information of effect of operation conditions changes such as temperature and pressure on membrane performance will be useful for operation controlling in micellar‐enhanced ultrafiltration in comparison with ultrafiltration.

Application of Polymeric Tubular Ultrafiltration Membranes for Separation of Car Wash Wastewater

“…Several works have shown that the fouling intensity can be reduced by using membranes with a low MWCO value [39][40][41]. For this reason, ESP04 membranes, for which the manufacturer declares a MWCO value of 4 kD, were used in the final step.…”

Application of Polymeric Tubular Ultrafiltration Membranes for Separation of Car Wash Wastewater

“…Several works have shown that the fouling intensity can be reduced by using membranes with a low MWCO value [39][40][41]. For this reason, ESP04 membranes, for which the manufacturer declares a MWCO value of 4 kD, were used in the final step.…”

Membrane Technologies in the Oil Industry and Their Potential Application for the Recovery of Phytonutrients From Palm Oil

“…Ultrafiltration membranes are also used in degumming processes in the study of colloidenhanced ultrafiltration, or polyelectrictrolyte ultrafiltration (PEUF), and micellar-enhanced ultrafiltration (MEUF) (Danis and Aydiner, 2009;Niazmand et al, 2015). These processes involve using a surfactant that adsorbs undesirable components electrostatically or through the hydrophobic feed effect, thereby resulting in the formation of complex aggregates (micelles of the surfactant) that cannot pass through the membrane.…”

“…In this case, the surfactant consists of Pl, which is hydrated to form micelles, which facilitate the separation of these compounds from the oil (Danis and Aydiner, 2009;Niazmand et al, 2015). Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

“…Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

Ultrafiltration of Cherry Concentrate Under Ultrasound with Carbonated Feed as a New Fouling Control Method

“…Membrane technology in various industries has significant progresses in recent years (Niazmand et al 2015). Flux decline is generally a problem in membrane separation that leads to a decrease in its performance (Soleimani et al 2013).…”

Application of Polymeric Tubular Ultrafiltration Membranes for Separation of Car Wash Wastewater

“…Several works have shown that the fouling intensity can be reduced by using membranes with a low MWCO value [39][40][41]. For this reason, ESP04 membranes, for which the manufacturer declares a MWCO value of 4 kD, were used in the final step.…”

Membrane Technologies in the Oil Industry and Their Potential Application for the Recovery of Phytonutrients From Palm Oil

“…Ultrafiltration membranes are also used in degumming processes in the study of colloidenhanced ultrafiltration, or polyelectrictrolyte ultrafiltration (PEUF), and micellar-enhanced ultrafiltration (MEUF) (Danis and Aydiner, 2009;Niazmand et al, 2015). These processes involve using a surfactant that adsorbs undesirable components electrostatically or through the hydrophobic feed effect, thereby resulting in the formation of complex aggregates (micelles of the surfactant) that cannot pass through the membrane.…”

“…In this case, the surfactant consists of Pl, which is hydrated to form micelles, which facilitate the separation of these compounds from the oil (Danis and Aydiner, 2009;Niazmand et al, 2015). Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

“…Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

Ultrafiltration of Cherry Concentrate Under Ultrasound with Carbonated Feed as a New Fouling Control Method

“…Membrane technology in various industries has significant progresses in recent years (Niazmand et al 2015). Flux decline is generally a problem in membrane separation that leads to a decrease in its performance (Soleimani et al 2013).…”

Application of Polymeric Tubular Ultrafiltration Membranes for Separation of Car Wash Wastewater

“…Several works have shown that the fouling intensity can be reduced by using membranes with a low MWCO value [39][40][41]. For this reason, ESP04 membranes, for which the manufacturer declares a MWCO value of 4 kD, were used in the final step.…”

Membrane Technologies in the Oil Industry and Their Potential Application for the Recovery of Phytonutrients From Palm Oil

“…Ultrafiltration membranes are also used in degumming processes in the study of colloidenhanced ultrafiltration, or polyelectrictrolyte ultrafiltration (PEUF), and micellar-enhanced ultrafiltration (MEUF) (Danis and Aydiner, 2009;Niazmand et al, 2015). These processes involve using a surfactant that adsorbs undesirable components electrostatically or through the hydrophobic feed effect, thereby resulting in the formation of complex aggregates (micelles of the surfactant) that cannot pass through the membrane.…”

“…In this case, the surfactant consists of Pl, which is hydrated to form micelles, which facilitate the separation of these compounds from the oil (Danis and Aydiner, 2009;Niazmand et al, 2015). Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

“…Niazmand et al (2015) studied micelle formation due to the presence of chelating agents such as ethylenediaminetetraacetic acid (EDTA) which improved the heritability of phosphorus and, in the presence of water, they observed that polyelectrolytes (with magnesium or calcium ions) can form micelles that precipitate, thereby enhancing the separation process. Niazmand et al (2015) reported high efficiency in process of removing phospholipids from crude canola oil.…”

Ultrafiltration of Cherry Concentrate Under Ultrasound with Carbonated Feed as a New Fouling Control Method

“…Membrane technology in various industries has significant progresses in recent years (Niazmand et al 2015). Flux decline is generally a problem in membrane separation that leads to a decrease in its performance (Soleimani et al 2013).…”