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Trends in Biodiesel Production from Animal Fat Waste

AuthorsToldrá-Reig, Fidel; Mora, Leticia ; Toldrá Vilardell, Fidel
Energy generation
Agricultural waste
Food waste
Animal waste
Animal fat
Issue Date25-May-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationApplied Sciences 10(10): 3644 (2020)
AbstractThe agro-food industry generates large amounts of waste that contribute to environmental contamination. Animal fat waste constitutes some of the most relevant waste and the treatment of such waste is quite costly because environmental regulations are quite strict. Part of such costs might be reduced through the generation of bioenergy. Biodiesel constitutes a valid renewable source of energy because it is biodegradable, non-toxic and has a good combustion emission profile and can be blended up to 20% with fossil diesel for its use in many countries. Furthermore, up to 70% of the total cost of biodiesel majorly depends on the cost of the raw materials used, which can be reduced using animal fat waste because they are cheaper than vegetable oil waste. In fact, 6% of total feedstock corresponded to animal fat in 2019. Transesterification with alkaline catalysis is still preferred at industrial plants producing biodiesel. Recent developments in heterogeneous catalysts that can be easily recovered, regenerated and reused, as well as immobilized lipases with increased stability and resistance to alcohol denaturation, are promising for future industrial use. This manuscript reviews the available processes and recent advances for biodiesel generation from animal fat waste.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/app10103644
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