This book provides a sophisticated and descriptive introduction to biodiesel. It deals with matters related to the quality of biodiesel, efficiency of combustion engines and the products that they discharge. Novel ways to define biodiesel properties are mentioned and how feedstocks, contaminants and production procedures can affect the quality of biodiesel have also been assessed. The performance of combustion engines has been assessed when fuelled with biodiesel with respect to the use of biofuel. Glycerol is one of the major byproducts of biodiesel. Its applications as raw material for biotechnological procedures and modern bio-refineries have also been discussed in this book.