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Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation.

Orozco, RL and Redwood, MD and Leeke, G and Bahari, A and Santos, RCD and Macaskie, LE (2012) Hydrothermal hydrolysis of starch with CO2 and detoxification of the hydrolysates with activated carbon for bio-hydrogen fermentation. International Journal of Hydrogen Energy. (In Press)

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URL of Published Version: http://dx.doi.org/10.1016/j.ijhydene.2012.01.047

Identification Number/DOI: 10.1016/j.ijhydene.2012.01.047

The imminent use of hydrogen as an energy vector establishes the need for sustainable production technologies based on renewable resources. Starch is an abundant renewable resource suitable for bio-hydrogen generation. It was hypothesised that starch hydrolysates from a large (250 mL) hydrothermal reactor could support bioH2 fermentation without inhibition by toxic byproducts.

Starch was hydrolysed at high concentrations (40 200 g.L-1) in hot compressed water (HCW) with CO2 at 30 bar in a 250 mL reactor, the largest so far for polysaccharide hydrolysis, at 180 235 °C, 15 min. Hydrolysates were detoxified with activated carbon (AC) and tested in biohydrogen fermentations. The maximum yield of glucose was 548 g.kg starch 1 carbon at 200 °C. 5 hydroxymethyl furfural, the main fermentation inhibitor, was removed by AC to support 70% more hydrogen production than the untreated hydrolysates. The potential utilization of starch hydrolysates from HCW treatment for upscaled fermentations is promising.

Type of Work:Article
Date:2012 (Submission)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Colleges (2008 onwards) > College of Life & Environmental Sciences
Department:School of Biosciences, School of Chemical Engineering
Subjects:Q Science (General)
Institution:University of Birmingham
Copyright Holders:Elsevier
ID Code:997
Refereed:YES
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