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- W2008434511 abstract "Fermentative hydrogen production is considered a reasonable alternative for generating H2 as an energy carrier for electricity production using hydrogen fuel cells. The kinetics of hydrogen production from glucose, xylose and cellobiose were investigated using pure culture Clostridium beijerinckii NCIMB 8052. Adding anthrahydroquinone-2,6-disulfonate (AH2QDS) at concentrations ranging from 100 mM to 500 mM increased the hydrogen production rates from 0.80 to 1.35 mmol/L-hr to 1.20e2.70 mmol/L-hr with glucose, xylose, or cellobiose as the primary substrates. AH2QDS amendment also increased the substrate utilization rate and biomass growth rate by at least two times. These findings suggest that adding hydroquinone reducing equivalents influence cellular metabolism with hydrogen production rate, substrate utilization rate, and growth rate being simultaneously affected. Resting cell suspensions were conducted to investigate the influence of AH2QDS on the hydrogen production rate from glyceraldehyde 3-phosphate, which is a shared intermediate in both glycolysis and pentose phosphate pathway. Data demonstrated that hydrogen production rate increased by 1.5 times when glyceraldehyde 3-phosphate was the sole carbon source, suggesting that the hydroquinone may alter reactions starting with or after glyceraldehyde 3-phosphate in central metabolism. These data demonstrate that adding hydroquinones increased overall metabolic activity of C. beijerinckii. This will eventually increase the efficiency of industrial scale production once appropriate hydroquinone equivalents are identified that work well in large-scale operations, since fermentation rate is one of the two critical factors (production rate and yield) influencing efficiency and cost. Copyright a 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved." @default.
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- W2008434511 date "2012-08-01" @default.
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- W2008434511 title "Anthrahydroquinone-2,6-disulfonate increases the rate of hydrogen production during Clostridium beijerinckii fermentation with glucose, xylose, and cellobiose" @default.
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- W2008434511 doi "https://doi.org/10.1016/j.ijhydene.2012.05.018" @default.
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