vegetable oil production

The vegetable oil production means processing of oils and fats from vegetable sources.Vegetable oil and fat resources are indispensable to mankind as a source of nutrient and industrial raw materials. Crude vegetable oil obtained from various oil milling units  is further refined before use for edible purposes.

Vegetable Oil Production

Generally speaking, the vegetable oil production process contains a series processing steps. Some vegetable oils, such as olive, peanut, and some coconut and sunflower oils, are cold-pressed. This method, which entails minimal processing, produces a light, flavorful oil suitable for some cooking needs. Most oil sources, however, are not suitable for cold pressing, because it would leave many undesirable trace elements in the oil, causing it to be odiferous, bitter tasting, or dark. These oils undergo many steps beyond mere extraction to produce a bland, clear, and consistent oil.

The first step of vegetable oil production is the preparation of raw materi- als includes husking, cleaning, crushing, and conditioning. Incoming oil seeds are passed over magnets to remove any trace metal before being dehulled, deskinned, or otherwise stripped of all extraneous material. The stripped seeds or nuts are then ground into coarse meal to provide more surface area to be pressed.

The oil extraction processes are generally mechanical or involve the use of solvent such as hexane. After boiling, the liquid oil is skimmed; after pressing, the oil is filtered; and after solvent extraction, the crude oil is separated and the solvent is evaporated and recovered.  Residues are conditioned (for example, dried) and are repro- cessed to yield by-products such as animal feed.

Crude oil refining includes degumming, neutral- ization, bleaching, deodorization, and further refining.

Edible oil refinery is a process where free fatty acids are volatized, condensed and    recovered simultaneously with vacuum de-colouring operation.

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