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Improving the Efficiency and Capacity of Edible Oil Refineries

It is often possible to improve the efficiency of edible oil refineries by making adjustments without any capital investment or by adding equipment that has a quick payback. As a starting point it is important to establish the current state of any plant and what it can do. Careful monitoring of the process will set a benchmark against which improvements can be measured.Simple measures such as changing the way that acid is added to the oil can potentially reduce the amount of acid required and reduce losses.In bleaching the use of silica and filter aids including diatomaceous earth and cellulose can improve the performance of filters and extend the life of filter leaves before cleaning is required.Deodorizing requires a compromise between the high temperatures required to remove volatile components and color in the oil, and the risk of forming process contaminants including trans isomers, glycidyl esters (GE) and monochloropropandiol (MCPD) esters. Raising the deodorizing temperature reduces the amount of steam per ton of oil required to remove the volatile components and can allow the production rate to be raised at the same time without always creating excessive amounts of contaminants.