Feasibility of degumming and neutralization of crude corn oil using polyvinylidene fluoride membrane
Subject Areas : TechMaryam Rashidian 1 , مریم قراچورلو 2 , Manochehr Bahmaei 3 , مهرداد قوامی 4 , حسین میرسعید قاضی 5
1 - 1. Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2 - Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran
3 - Department of Analytical Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
4 - دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران
5 - پاکدشت- پردیس ابوریحان دانشگاه تهران - گروه فناوری صنایع غذایی
Keywords: Acidity, Corn oil, Membrane, Refining, Permeate flux,
Abstract :
Introduction: Conventional methods of extracting oil from oilseeds all over the world lead to high energy consumption, solvent recovery, high consumption of water and chemicals, etc., which in addition to reducing the quality of the extracted oil, also increases the cost of the process. Therefore current research, has evaluated the efficiency of the microfiltration system made of polyvinylidene fluoride membrane in degumming and neutralization of crude corn oil. Materials and Methods: Crude corn oil miscellas were prepared using hexane solvent with 20:80 and 30:70 ratios and passed through the membrane under different operating conditions. The variables include three levels of pressure (2, 3 and 4 bar), three levels of temperature (30, 40, and 50 degrees of centigrade) and two levels of flow rate: (0.5 and 1.0 m/s). All treatments were done in 3 replicates. Then, the performance parameters of the two-stage membrane process (MF), including permeate flux, membrane resistances, and fouling were investigated. Results: The results showed that for both micella, the flux gradually decreased with the passage of time and reached to a stable state. Surveying the simultaneous effect of temperature, pressure and flow rate through the neutralization process for 20:80 micella, revealed that the highest flux corresponds to 50 0C, 2 bar, 1.0 m/s. The simultaneous effect of temperature, pressure and flow rate through the neutralization process for 30:70 micella, also revealed that the highest flux corresponds to 40 0C, 3 bar, and 1.0 m/s. Conclusion: The results of the physicochemical tests showed that the membrane refining method is able to reduce corn oil impurities such as phospholipids, free fatty acids, peroxide value and color as well as the classical refining method, which possesses advantages such as higher efficiency, lower energy and chemical consumption and more protection of the environment.
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