There are different options for rice bran oil extraction section, depending on the type of solvent and the method of extraction. Some of the common options are:
1. Mechanical pressing (Cold pressing): This is a physical process that uses a screw press to squeeze out the oil from the rice bran. This method produces a low yield of oil, but preserves the quality and nutritional value of the oil. It is suitable for small-scale production and does not require any solvent or chemical treatment.
2. Solvent extraction process: This is a chemical process that uses a solvent, usually hexane, to dissolve the oil from the rice bran. This method produces a high yield of oil, but also generates a lot of waste and environmental pollution. It requires a complex and expensive equipment and a large amount of solvent. The solvent also affects the quality and nutritional value of the oil, and needs to be removed by further refining.
3. Green extraction technologies: These are alternative methods that use environmentally friendly solvents or techniques to extract the oil from the rice bran. Some examples are supercritical fluid extraction, microwave-assisted extraction, ultrasound-assisted extraction, enzyme-assisted extraction, and aqueous extraction. These methods aim to reduce the solvent consumption, waste generation, energy consumption, and environmental impact of the extraction process. They also preserve the quality and nutritional value of the oil, and enhance the recovery of bioactive compounds.