469298 The Dynamics of Biodiesel Profile and Fungal Diversity of Activated Sludge during Lipid Accumulation on Acetic Acid

Monday, November 14, 2016: 2:10 PM
Union Square 3 & 4 (Hilton San Francisco Union Square)
Dhan Lord Fortela1, Rafael Hernandez1, Mark Zappi1, Andrei Chistoserdov2, Rakesh Bajpai1, Emmanuel Revellame3 and William Holmes3, (1)Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA, (2)Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, (3)Energy Institute, University of Louisiana at Lafayette, Lafayette, LA

Recent studies indicated that the microbial consortia of wastewater treatment plant (WWTP) activated sludge feeding on acetic acid can accumulate lipids, which can be transesterified into biodiesel. The composition of the raw activated sludge, however changes significantly with the fluctuations of operational and environmental conditions in a WWTP. The variations in raw activated sludge composition may pose additional processing cost after extraction and transesterification of the lipids if there is significant variation of the biodiesel profile (measured as fatty acid methyl esters or FAMEs) among raw activated sludges. This study describes the changes on biodiesel profile during lipid accumulation on acetic acid. The changes on the diversity of fungal community are also correlated to the changes in biodiesel profile. The findings suggest that even with variations in the biodiesel profiles from lipids of raw activated sludge, the enhancement of lipid content by feeding on acetic acid induces speciation of microbial community, specifically fungi, resulting in the homogenization of biodiesel profiles.

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See more of this Session: Novel Engineering Approaches to Separations
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