Biofuel from Polyhydroxyalkanoates (PHAs)
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Abstract
The limited reserves and negative environmental consequences of fossil fuel have spurred the search for renewable biofuels. Polyhydroxyalkanoates (PHAs) producing-bacteria was proposed as an alternative biofuel, termed as hydroxyalkanoate methyl ester (HAME) and hydroxybutyrate methyl ester (HBME) which are similar to biodiesel. In addition, HAME and HBME are environmental friendly fuel, have high oxygen content without nitrogen and sulfur. In contrast, petroleum contains very low oxygen high nitrogen and sulfur contents, which can lead to environmental pollutions when burning. PHAs are polyesters produced in nature by numerous bacterial, including through bacterial fermentation of renewable carbon sources. The utilization of PHAs as substrate for biofuel seems reasonable at first glance. Consequently, the development of HAME and HBME as sustainable fuel or fuel additives may contribute to the diversification of biofuel or fuel additive market. In this article, production, properties and research of biofuel from PHAs were reviewed. In addition, future work on biofuel from PHAs was also discussed.
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