Bioprocesses for the Biodiesel Production from Waste Oils and Valorization of Glycerol

The environmental context causes the use of renewable energy to increase, with aim finding alternatives fossil-based products such as fuels. Biodiesel, an alternative diesel, is now a well-developed solution, and its production from resources makes it perfectly suitable in context. In addition, biodegradable, non-toxic has low greenhouse gas emissions: reduced about 85% compared diesel. However, feedstock used produce biodiesel competes agriculture application chemical reactions not advantageous “green” process. Therefore, this review focuses only on bioprocesses currently taking important place allow high yields, above 90%, very few produced impurities. waste oils feedstock, which accounts for 10% feedstocks biodiesel, avoids competition agriculture. To present complete life-cycle review, second part will focus valorization by-product, glycerol. About glycerol generated during so should be recovered value-added products, always based bioprocesses. This also existing techniques extract purify end, collection CO2 combustion presents steps using “greener” possible processes.