Comprehensive study on biodiesel produced from waste animal fats-A review

TLDR: In this paper, the authors summarized the detailed literature study on biodiesel produced from waste animal fats discarded from leather tanneries and animal slaughter houses and focused on the extraction techniques, refining process, biodiesel production process along with its advantages and effect on engine.

Abstract: Biodiesel is a long chain fatty acid alkyl ester molecule with robust characteristics suitable for both environment and as alternate energy resources. This paper aimed in summarizing the detailed literature study on biodiesel produced from waste animal fats discarded from leather tanneries and animal slaughter houses. This study concentrated on the extraction techniques, refining process, biodiesel production process along with its advantages and effect on engine. The fats had been proven to a viable feedstock when compared to vegetable oil and waste cooking oil in terms of productivity and economy. Various technical challenges involved in biodiesel production are food vs. fuel conflict over feedstock, auxiliary energy requirement for fat extraction and biodiesel production, Free Fatty Acid content, optimizing the reaction. Effects of biodiesel on engine application had also been discussed and will be providing wider scope of research for overcoming these short comes. This literature study affirmed that biodiesel produced from waste animal fat has a very good impact in reducing environmental pollution and moving a step ahead towards an effective sustainable development.