Crushing characteristics of mustard with commercial oil expeller

摘要

The rapeseed mustard contains about 35-40% oil. which is generally expelled by screw type mechanical oil expellers or motorised rotaries. A commercial 9 bolt oil expeller was tested for mustard oil expulsion at 4.6% moisture content of raw seed. The oil recovery was found to be 19.18%, 35.78%, 24.04% and 6.01% in the first, second, third and fourth passes, respectively, The temperature of the barrel and the thickness of the cake were measured during oil expulsion process. The average throughput was 135 kg/h of seed and the efficiency of oil expression in three passes was 79% at seed oil content of 35%. The average speed of the worm was 46 rpm. The pattern of barrel temperature indicated higher temperature at bolt numbers 5.6, and 7. The average temperature of the barrel was 66.1 deg C.