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Latest trends in feedstocks for biodiesel production
Sara Pinzi, David Leiva-Candia, Isabel López-García, M. Dolores Redel-Macías, M. Pilar Dorado,
University of Cordoba, Spain
Received January 18, 2013; revised June 28, 2013; and accepted July 3, 2013
View online August 14, 2013 at Wiley Online Library (wileyonlinelibrary.com); DOI: 10.1002/bbb.1435;
Biofuels, Bioprod. Bioref. 8:126–143 (2014)
Abstract: Edible seed oil biodiesel has been criticized due to its low sustainability and potential conflict with food and fiber production for the use of arable land, besides high water and fertilizer requirements. In this context, biodiesel from non-edible sources, like animal fat, waste oil, insect oil, or single cell oil constitutes an alternative biofuel that omits the previous drawbacks. In this review and taking into account the previous consideration, the most interesting feedstocks for biodiesel production are shown. While frying oils and animal fats constitute the most extensively studied non-edible raw materials for biodiesel production, soapstocks are gaining interest among the scientific community. Finally, promising feedstocks for biodiesel production, such as microbial oil (also named single cell oil), insect oil, or microdiesel are reviewed. © 2013 Society of Chemical Industry and John Wiley & Sons, Ltd
Keywords: low cost biodiesel; microalgae; microbial oil; single cell oil; insect oil

Introduction ritish Petroleum’s (BP’s) Statistical Review of World
Energy estimated the accessible crude oil resources about 171.1 thousand million tonnes at the end of
2010. Considering the current world consumption about
11.6 million tons of crude oil per day, fossil resources will only be available for a short period of time.1,2
Furthermore, the combustion of fossil resources generates massive emissions of greenhouse gases (GHGs) that are contributing to the irreparable change to the global climate. Consequently, a sustainable and

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