Cod liver oil is typically extracted via wet rendering or enzymatic hydrolysis, which gently separates the oil from liver tissues while preserving its integrity. After extraction, the oil must be filtered, degummed, and dried to remove impurities like proteins, water, and phospholipids that may interfere with biodiesel conversion. Deacidification may be required if free fatty acid (FFA) content is high. The GlobeCore USB biodiesel system handles the pre-treated oil efficiently, offering integrated drying, heating, and reaction stages that ensure a clean and reactive feedstock for biodiesel production.