RECOVERY OF FRIED SUNFLOWER OIL BY USING SOME AGRICULTURAL WASTES.
Abstract: The main aim of present study was to use ashes of orange peel, olive pomace and corn cobs (some agricultural wastes) to adsorb the oxidation products of fried sunflower oil and to compare its adsorption efficiency to recover and regenerate the used sunflower oil. The physico-chemical properties [refractive index, viscosity, colour, smoke point, acid value, peroxide value, thiobarbituric acid (TBA) value, conjugated dienes and trienes, polar content and polymer content] of fresh, fried and fried-treated sunflower oil were determined. The frying process was carried out at 180 ± 5°C for 16h (4h heating cycle per day for four consecutive days).
The filter aids (ashes of agricultural wastes) were added individually to the fried oil at levels 1, 2 and 4 % (w / v), then mechanically stirred for 60 min at 105 ?C.
Frying of sunflower oil led to increase in refractive index, viscosity, colour, acid value, peroxide value, TBA value, conjugated dienes and trienes, polar content and polymer content and decrease in smoke point.
The results revealed that the ashes of orange peel, olive pomace and corn cobs have efficiency to recover and regenerate the quality of fried sunflower oil and have adsorbent property to adsorb and remove oil oxidative components.
Treatments of fried sunflower oil with ashes of agricultural wastes (orange peel, olive pomace and corn cobs) with different levels 1, 2, 4% improved the quality of fried-treated oil. The recovery was increased with increasing the adsorbent concentration.
Biodiesel produced from treated fried sunflower oil showed that acidity, Iodine value, saponification value, cetane index (CI) and higher heating value (HHV) were according to the European Standard for biodiesel (EN14214).
Publication year 2014
Organization Name
serial title J. Agric. Res. Kafr El-Sheikh Univ
Author(s) from ARC
Publication Type Journal
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