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Energies 2013, 6(9), 4739-4768; doi:10.3390/en6094739

Microbial Conversion of Waste Glycerol from Biodiesel Production into Value-Added Products

Department of Biological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, OR 97331, USA
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Received: 6 June 2013 / Revised: 19 July 2013 / Accepted: 4 September 2013 / Published: 10 September 2013
(This article belongs to the Special Issue Biomass and Biofuels 2013)
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Abstract

Biodiesel has gained a significant amount of attention over the past decade as an environmentally friendly fuel that is capable of being utilized by a conventional diesel engine. However, the biodiesel production process generates glycerol-containing waste streams which have become a disposal issue for biodiesel plants and generated a surplus of glycerol. A value-added opportunity is needed in order to compensate for disposal-associated costs. Microbial conversions from glycerol to valuable chemicals performed by various bacteria, yeast, fungi, and microalgae are discussed in this review paper, as well as the possibility of extending these conversions to microbial electrochemical technologies.
Keywords: biodiesel waste glycerol; microbial conversion; 1,3-propanediol; ethanol; lactic acid; hydrogen; citric acid; microbial electrochemical technologies biodiesel waste glycerol; microbial conversion; 1,3-propanediol; ethanol; lactic acid; hydrogen; citric acid; microbial electrochemical technologies
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Li, C.; Lesnik, K.L.; Liu, H. Microbial Conversion of Waste Glycerol from Biodiesel Production into Value-Added Products. Energies 2013, 6, 4739-4768.

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