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Findings from Arizona State University Yields New Data on Propionates (The source of inoculum plays a defining role in the development of MEC...

August 13, 2014



Findings from Arizona State University Yields New Data on Propionates (The source of inoculum plays a defining role in the development of MEC microbial consortia fed with acetic and propionic acid mixtures)

By a News Reporter-Staff News Editor at Biotech Week -- A new study on Propionates is now available. According to news reporting from Tempe, Arizona, by NewsRx journalists, research stated, "Microbial electrolysis cells (MECs) can be used as a downstream process to dark fermentation to further capture electron in volatile fatty acids that remain after fermentation, improving this way the viability of the overall process. Acetic and propionic acid are common products of dark fermentation."

The news correspondents obtained a quote from the research from Arizona State University, "The main objective of this work was to investigate the effect of different initial concentrations of a mixture of acetic and propionic acids on MECs microbial ecology and hydrogen production performance. To link microbial structure and function, we characterized the anode respiring biofilm communities using pyrosequencing and quantitative-PCR. The best hydrogen production rates (265 mL/d/L-reactor) were obtained in the first block of experiments by MEC fed with 1500 mg/L acetic acid and 250 mg/L propionic acid. This reactor presents in the anode biofilm an even distribution of Proteobacteria, Firmicutes and Bacteroidetes and Arcobacter was the dominant genera. The above fact also correlated to the highest electron load among all the reactors."

According to the news reporters, the research concluded: "It was evidenced that although defined acetic and propionic acid concentrations fed affected the structure of the microbial consortia that developed at the anode, the initial inoculum played a major role in the development of MEC microbial consortia."

For more information on this research see: The source of inoculum plays a defining role in the development of MEC microbial consortia fed with acetic and propionic acid mixtures. Journal of Biotechnology, 2014;182():11-18. Journal of Biotechnology can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Biotechnology - www.elsevier.com/wps/product/cws_home/505515)

Our news journalists report that additional information may be obtained by contacting V. Ruiz, Arizona State University, Sch Sustainable Engn & Built Environm, Tempe, AZ 85287, United States. Additional authors for this research include Z.E. Ilhan, D.W. Kang, R. Krajmalnik-Brown and G. Buitron (see also Propionates).

Keywords for this news article include: Tempe, Arizona, Propionates, United States, Propionic Acids, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Biotech Week


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