influence of fluidization on canola drying time and oil quality parameters

نویسندگان

حمیدرضا گازر

رامین حسین خواه

چکیده

canola is known as an important oilseeds crop throughout the world. cultivation and subsequent oil extraction of this crop has gained substatantial development in recent years in iran. many parts of iran (northern provinces) especially golestan and mazandarn are of high relative humidity during harvesting season as well as during storage periods. spoilage and rancidity are problems more encountered in these regions. decreasing grain moisture content to a safe level causes increased safe storage time as well as preserved quality. it would be highly beneficial for canola producer and processor in high relative humidity localities to use new methods of drying. in this research, fluidized vs fixed bed conditions were employed for canola drying at eight experimental temperatures of 30, 40, 50, 60, 70, 80, 90 and 100 °c using a lab. scale fluidized bed dryer. effects of temperature and bed condition were investigated on the drying time and drying rate parameters. a completely randomized design (crd) as the experimental procedure was employed with three replications. results indicated that using fluidized bed technique increased the drying rate while decreasing the time needed for drying, this effect being more pronounced in temperatures of less than 50 °c. for an instance, fluidizing of canola grains during the drying process caused energy savings while decreasing the drying time by approximately 32% at a temperature of 30°c as compared with fixed bed drying. this effect was less for high temperatures and was calculated approximately 27.8 % at 70-100°c. by increasing temperature, percentage of oil extraction of dried grains significantly increased while peroxide values of extracted oil remaining unchanged. fluidizing favorably affected such quality factors as free fatty acids and color

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

influence of kernel fluidization on the drying and cultivation properties of canola seeds

several methods are used to decrease seed drying time and enhance the quality of dried seeds. influidization methods, good aeration occurs during the drying process. in this research, conditioned seedswith 20% d.b. moisture content were dried at 30°, 40°, 50° and 60°c using three bed conditions (fixed,minimum fluidized, fluidized). all experiments were done using a batch-type fluidized bed drye...

متن کامل

Effect of Drying Operating Conditions on Canola Oil Tocopherol Content

The aim of this work was to evaluate two operating parameters of seed drying (temperature and initial moisture content) on the tocopherol content of canola oil. The raw material was characterized by moisture, oil, protein, crude fiber and ash content. Seeds at 13.6% and 22.7% moisture content (dry basis, db) were dried at temperatures in the range of 35-100 °C to a safe storage moisture of 7% d...

متن کامل

effect of seed priming and irrigation regimes on yield,yield components and quality of safflowers cultivars

این مطالعه در سال 1386-87 در آزمایشگاه و مزرعه پژوهشی دانشگاه صنعتی اصفهان به منظور تعیین مناسب ترین تیمار بذری و ارزیابی اثر پرایمینگ بر روی سه رقم گلرنگ تحت سه رژیم آبیاری انجام گرفت. برخی از مطالعات اثرات سودمند پرایمینگ بذر را بر روی گیاهان مختلف بررسی کرده اند اما در حال حاضر اطلاعات کمی در مورد خصوصیات مربوط به جوانه زنی، مراحل نموی، عملکرد و خصوصیات کمی و کیفی بذور تیمار شده ژنوتیپ های م...

influence of temperature and air velocity on the canola drying process and its quality

the canola drying process was investigated using three laboratory scale dryers connected to a computer which continuously recorded the drying processes of each unit. a completely randomized design (crd) with three replications was used for the statistical analysis. the effect of temperature (40°, 50°, 60°c) and air velocity (1, 2 m/s) on the drying kinetics of a monolayer were studied. the effe...

متن کامل

Effect of Sunflower Seed Drying on Some Quality Parameters of the Seed and Oil

Drying temperature and time effect on oil quality parameters of both seed and kernel from a sunflower hybrid of potential high oil content was evaluated. Drying tests were carried through two treatments of thin layer drying, consisting the first in getting the equilibrium moisture content and the second a safe storage moisture value, both in a range of temperatures from 25 °C to 90 °C. Prolonge...

متن کامل

Effect of process parameters on quality properties and drying time of hawthorn in a vibro-fluidized bed dryer

The drying kinetics of hawthorn in a pilot-scale experimental fluidized bed dryer with and without vibration was investigated. The effect of operating parameters, such as vibration intensity, drying air flow rate, and temperature, on the drying rate and shrinkage of hawthorn was studied. The hawthorn fruit was dried at various drying air temperatures ranging from 40-70oC and drying air volume f...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
مهندسی بیوسیستم ایران

جلد ۳۹، شماره ۱، صفحات ۰-۰

کلمات کلیدی
[ ' c a n o l a i s k n o w n a s a n i m p o r t a n t o i l s e e d s c r o p t h r o u g h o u t t h e w o r l d . c u l t i v a t i o n a n d s u b s e q u e n t o i l e x t r a c t i o n o f t h i s c r o p h a s g a i n e d s u b s t a t a n t i a l d e v e l o p m e n t i n r e c e n t y e a r s i n i r a n . m a n y p a r t s o f i r a n ( n o r t h e r n p r o v i n c e s ) e s p e c i a l l y g o l e s t a n a n d m a z a n d a r n a r e o f h i g h r e l a t i v e h u m i d i t y d u r i n g h a r v e s t i n g s e a s o n a s w e l l a s d u r i n g s t o r a g e p e r i o d s . s p o i l a g e a n d r a n c i d i t y a r e p r o b l e m s m o r e e n c o u n t e r e d i n t h e s e r e g i o n s . d e c r e a s i n g g r a i n m o i s t u r e c o n t e n t t o a s a f e l e v e l c a u s e s i n c r e a s e d s a f e s t o r a g e t i m e a s w e l l a s p r e s e r v e d q u a l i t y . i t w o u l d b e h i g h l y b e n e f i c i a l f o r c a n o l a p r o d u c e r a n d p r o c e s s o r i n h i g h r e l a t i v e h u m i d i t y l o c a l i t i e s t o u s e n e w m e t h o d s o f d r y i n g . i n t h i s r e s e a r c h ' , ' f l u i d i z e d v s f i x e d b e d c o n d i t i o n s w e r e e m p l o y e d f o r c a n o l a d r y i n g a t e i g h t e x p e r i m e n t a l t e m p e r a t u r e s o f 3 0 ' , 4 0 , 5 0 , 6 0 , 7 0 , 8 0 , ' 9 0 a n d 1 0 0 ° c u s i n g a l a b . s c a l e f l u i d i z e d b e d d r y e r . e f f e c t s o f t e m p e r a t u r e a n d b e d c o n d i t i o n w e r e i n v e s t i g a t e d o n t h e d r y i n g t i m e a n d d r y i n g r a t e p a r a m e t e r s . a c o m p l e t e l y r a n d o m i z e d d e s i g n ( c r d ) a s t h e e x p e r i m e n t a l p r o c e d u r e w a s e m p l o y e d w i t h t h r e e r e p l i c a t i o n s . r e s u l t s i n d i c a t e d t h a t u s i n g f l u i d i z e d b e d t e c h n i q u e i n c r e a s e d t h e d r y i n g r a t e w h i l e d e c r e a s i n g t h e t i m e n e e d e d f o r d r y i n g ' , ' t h i s e f f e c t b e i n g m o r e p r o n o u n c e d i n t e m p e r a t u r e s o f l e s s t h a n 5 0 ° c . f o r a n i n s t a n c e ' , ' f l u i d i z i n g o f c a n o l a g r a i n s d u r i n g t h e d r y i n g p r o c e s s c a u s e d e n e r g y s a v i n g s w h i l e d e c r e a s i n g t h e d r y i n g t i m e b y a p p r o x i m a t e l y 3 2 % a t a t e m p e r a t u r e o f 3 0 ° c a s c o m p a r e d w i t h f i x e d b e d d r y i n g . t h i s e f f e c t w a s l e s s f o r h i g h t e m p e r a t u r e s a n d w a s c a l c u l a t e d a p p r o x i m a t e l y 2 7 . 8 % a t 7 0 ' , ' 1 0 0 ° c . b y i n c r e a s i n g t e m p e r a t u r e ' , ' p e r c e n t a g e o f o i l e x t r a c t i o n o f d r i e d g r a i n s s i g n i f i c a n t l y i n c r e a s e d w h i l e p e r o x i d e v a l u e s o f e x t r a c t e d o i l r e m a i n i n g u n c h a n g e d . f l u i d i z i n g f a v o r a b l y a f f e c t e d s u c h q u a l i t y f a c t o r s a s f r e e f a t t y a c i d s a n d c o l o r ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023