8523

7904

كارشناسي ارشد

علوم و صنايع غذايي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1392

دوازده،92ص.: جدول،نمودار

ص.ع.به فارسي و انگليسي

اميرحسين گلي، جواد كرامت

مهران شيرواني

15/11/92

مهدي كديور، شمس اله ايوبي

مهندسي كشاورزي

ID7904

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Bleaching Canola Oil Using Acid Activated Sepiolite Mojtaba Saneei m saneei@ag iut ac ir September 29 2013 Department of Food Science and Technology Isfahan University of Technology Esfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Amir Hosein Goli Assist Prof amirgoli@cc iut ac ir Javad Keramat Assoc Prof keramat@cc iut ac ir Abstract In order to enhance the use and stability of edible oil it needs to refine crude oil in several stages Bleaching is one of the most important steps in refining carotene and chlorophyll removal but some other impurities such as free fatty acids peroxide value and phosphorus would be removed Bleaching not only makes the oil customer friendly but also increases its stability and shelf life Among the effective factors on bleaching third of them including bleaching earth reaction temperature and time are most significant Different bleaching earth are using that one of them is bentonite Sepiolate is also one of the clay types that its mine was first discovered and extracted in 2010 in Iran Due to the high active surface it can be used as bleaching clay In this study acid activated sepiolite was used as bleaching earth BET analysis showed that during acid activation Sepiolites surface area changed from 105 m2 g to 168 m2 g to optimize the condition of oil bleaching the factors of amount of bleaching clay bleaching time and temperature were considered and optimum point was obtained response surface methodology RSM The results showed that there was no significant difference between real condition and predicted data by software Clay Amount had the highest effect on the removal of pigments and free fatty acids and the optimum bleaching condition was bleaching earth 3 time 42 46 and temperature 110 C then bleaching activity of sepiolite was compared with clays used in industry in two condition of optimum point and the one applied in factory The findings should that sepiolite was the most effective clay in carotene and chlorophyll contents respectively Generally due to higher content of bleaching clay optimum point was more effective than industrial condition in spite of insignificant differences in some bleaching indices sepiolate could be used as a proper substitute to imported bleaching earth Keyword Bleaching Sepiolite Optimization Acid Activation PDF created with pdfFactory trial version www pdffactory com

اميرحسين گلي، جواد كرامت

مهران شيرواني

مهدي كديور، شمس اله ايوبي