The biodiesel segment currently dominates the global used cooking oil (UCO) market. This is because spent cooking oil is more readily available and less expensive than vegetable oil, which encourages producers of biodiesel to use it as a main feedstock. This in turn increases demand for used cooking oil. Additionally, there is an increase in the manufacture of biodiesel from spent cooking oil because it uses 96 percent less energy than fossil diesel production while saving 21 percent of fossil energy compared to crude oil. This has increased the usage of leftover cooking oil in the manufacturing of biodiesel and made it popular among producers of that fuel.
By-products from the recycling process are beneficial in the production of glycerin and soap, increasing the demand for these items. Recent improvements in garbage recycling technology have inspired people to recycle waste materials and turn them into environmentally friendly products. The used cooking oil has a huge potential for being processed into different biofuels to provide electricity. Utilizing used cooking oil to make biodiesel results in cleaner burning fuel with a smaller carbon footprint. Compared to petroleum diesel, they also generate less carbon monoxide and are more affordable.