A：Environmental issues should be paid attention to during edible oil refining including wastewater treatment and recycling, waste gas emission and odor control, and treatment and utilization of solid waste, etc.

A：The refining units play a crucial role in the edible oil extraction process. Its main function is to deeply process the crude or semi-refined oil to remove impurities, undesirable pigments, and odor substances,improving the purity, taste, and quality of t

A：The edible oil refining is often considered a low-margin business because of edible oils' commodity nature, high competition, price volatility of raw materials, high operating costs and low value-added differentiation, etc.

A：Crude oil refining work involves four steps: degumming, deacidifying, decolorizing, and deodorizing, aiming at removing impurities, enhancing taste, and improving the stability of cooking oil.