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Potential of Alligator Fat as Source of Lipids for Biodiesel Production

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Srividya Ayalasomayajula†, Ramalingam Subramaniam†, August Gallo‡, Stephen Dufreche†, Mark Zappi†, and Rakesh Bajpai†*

^†Chemical Engineering Department and ^‡Chemistry Department, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States

Ind. Eng. Chem. Res., 2012, 51 (4), pp 2166–2169

DOI: 10.1021/ie201000s

Publication Date (Web): July 15, 2011

*E-mail: rxb6779@louisiana.edu.

This article is part of the

Nigam Issue

special issue.

Section:

Electrochemical, Radiational, and Thermal Energy Technology

Abstract

A large amount of alligator fat (AF) is produced by alligator meat processing industry and disposed in landfills or discarded as waste. The AF can be used as a potential feedstock for biodiesel production due to its high lipid content. In this work, recovery of lipids from the AF tissue was studied by solvent extraction as well as by microwave rendering. Microwave rendering resulted in AF oil recovery of 61% by weight of the frozen AF tissue obtained from producers. The fatty acid profile of the lipid showed that palmitic acid (C16:0), palmitoleic acid (C16:1), and oleic acid (C18:1) were the dominant fatty acids accounting for 89–92% of all lipids by mass; 30% of the fatty acids were saturated and 70% were unsaturated. The biodiesel produced from AF oil was found to meet the ASTM specifications of biodiesel concerning kinematic viscosity, sulfur, free and total glycerin, flash point, cloud point, and acid number.

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History

Published In Issue February 01, 2012
Article ASAPJuly 29, 2011
Just Accepted ManuscriptJuly 15, 2011
Received: May 09, 2011
Accepted: July 15, 2011
Revised: July 14, 2011

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Potential of Alligator Fat as Source of Lipids for Biodiesel Production