This is a rapidly growing segment in vegetable oil processing area. Vegetable oil is purified of the impurities by either chemical, physical, semi-physical or modified chemical refining process, depending on the quality of the crude oil and the overall economy of scale for the process. The crude oil can be refined to essentially complete neutralization with caustic without deodorizing the oil. However, the size of the plant may justify full physical refining process, based on savings on oil yield. Each case is unique and must be investigated before the type of crude oil processing is recommended. MG Edible Oil Consulting can provide full design for the crude oil refining and the methylation process for biodiesel plants.