All oil and fat removing process ha

All oil and fat removing process have the objective of
1. Producing un damaged products
2. Obtaining as much yield as economically feasible
3. Producing a low fat residue of the greatest possible value
PRE TREATMENT OR PREPARATION : All treatment of the raw material previous to extraction, such as cleaning, dehulling, crushing, cooking, detoxification, etc
EXTRACTION OF OILS : The Separation of material into oil and residue, called cake
POST EXTRACTION TREATMENTS : Comprising the purification of the oil and treatment of the cake according to requirements of the market
REFINED OILS AND FATS

CLEANING
The removal of foreign materials from oil seeds
Contoh: stems, stones --------- abrasive and contain no oil
weed seed------------ contain different kinds of oil dirt, leaves
Cleaning is important not only to ensure the good quality of the final products oil and meal but also to avoid premature wear of the preparation equipment
Cleaning machines : sreens, vibrating screens, magnets, aspirators, shape sorters

DEHULLING
Dehulling is a process of removing hulls from the oil seeds for obtaining high quality edible oil
The reduces fibrous content of the meal and increases the marketability as stock feed
About 99% of oil is stored naturally in kernels and the hulls are not removed they reduce the total yield of oil by absorbing or retaining oil in the press cake
The wax and coloring matters present in the hulls get mixed with the expressed edible oil, therefore increase the production cost of edible oil
Without dehulling reduce the capacity of the extraction equipment
CRUSHING AND FLAKING
The extraction of oil from oil seeds, either by mechanical extraction or solvent extraction, is facilitated by reduction of the seed to small particles
FLAKING
Flaking serves to rupture the cell structure and make the oil more readily available to the press
Oil seed meats are usually flattened into thin flakes:
1. To help to more readily expose the oil to solvent
2. It also reduces power consumption of screw press
3. It also ensure a more uniform cook (if the oil seed requires cooking), because all oilseed particles are uniformily thick