Used cooking oil refers to edible vegetable oil that has been previously utilized for cooking or frying purposes. It is commonly generated as waste in restaurants, catering establishments, and households. Instead of discarding it, used cooking oil can be repurposed for various applications. One prominent use is its conversion into biodiesel through a process known as transesterification, resulting in a sustainable fuel called UCOME (Used Cooking Oil Methyl Ester). This recycling process helps minimize waste and promotes the production of environmentally friendly energy sources.