تاثير رطوبت زمان برداشت و دماي خشك كردن دانه كلزا بركيفيت روغن استحصالي

Effect of harvesting moisture and drying temperature of rapeseed on oil quality

Rapeseed is the 3rd oilseed in the world after soybean and palmoil. Recently, the production of rapeseed in Iran has greatly emphasized for enhancement of oil production. For storage of oilseeds before processing, drying of seeds to a safe moisture level is necessary. In this study, effect of moisture content at harvesting time and drying temperatures on the quantity and the quality of canola oil were investigated. Seeds at moisture level of 12, 16 and 20% (w/w) were harvested and then dried in 65,75,85,95 and 105°c to final moisture of 8% (w/w). Then parameters of total oil, acidity, Iodine value and colour of oil were evaluated. The results showed that drying of rapeseed in 85 °c and initial moisture of 12 or 16% was the best conditions for drying rapeseed without adverse effect on oil quality.