Inexpensive oil and fats feedstocks for production of biodiesel

Biodiesel is an alternative to petroleum-based fuels derived from edible and inedible vegetable oils, animal fats, and used waste cooking oil including triglycerides. Biodiesel fuel has better properties than petrodiesel fuel; it is renewable, biodegradable, non-toxic, and essentially free Of Sulfur and aromatics. Biodiesel seems to be a realistic fuel for future; it has become more attractive recently because of its environmental benefits. Biodiesel obtained from waste cooking vegetable oils, tallow fat and poultry fat have been considered promising options. Waste cooking oil is available with relatively cheap price for biodiesel production in comparison with fresh vegetable oil costs.