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  • Are vegetable oil refinery wastewaters biodegradable?
  • The BOD 5 /COD ratios of the factory wastewaters are 0.15 and 0.2 for corn oil and sunflower oil refining wastewaters . Aslan et al. investigated the biodegradability of vegetable oil refinery wastewaters and concluded that they have a low BOD 5 /COD ratio and that these wastewaters cannot be treated only by biological treatment.
  • What is vegetable oil refining?
  • Crude vegetable oil obtained at these facilities is then transferred to a refining facility where it is prepared for human consumption or prepared for use in animal feeds. Refining of edible oil is a process where free fatty acids are volatilized, condensed, and recovered simultaneously with vacuum decoloring operation.
  • What is edible oil refining?
  • Edible oil refining is a set of processes or treatments necessary to turn vegetable raw oil into edible oil .
  • How does refining a vegetable oil produce wastewater?
  • The refining of crude vegetable oils generates large amounts of wastewater. The neutralization step, in particular, produces sodium salts of free fatty acids (soap-stocks) which breaks down through the use of H 2 SO 4 and generates highly acidic and oily wastewater .