BioChem - DOS

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

International journal of hydrogen energy

Orozco, R.L.; Redwood, M.D.; Leeke, G.A.; Bahari, A.; Santos, R.C.D.; Macaskie, L.E.

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 bioH<SUB>2</SUB> fermentation without inhibition by toxic byproducts. Starch was hydrolysed at high concentrations (40-200 g L<SUP>-1</SUP>) in hot compressed water (HCW) with CO<SUB>2</SUB> at 30 bar in a 250 mL reactor, the largest so far for polysaccharide hydrolysis, at 180-235 <SUP>o</SUP>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<SUP>-1</SUP> carbon at 200 <SUP>o</SUP>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.

2012

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

37

8

pp.6545-6553

10.1016/j.ijhydene.2012.01.047

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART62195689

http://pure-oai.bham.ac.uk/ws/files/2922572/Orozco_et_al_2012_-_Int_J_Hydrog_Energy_-_Starch_hydrolysis.pdf

Hot compressed water; Hydrothermal hydrolysis; Detoxification; Biohydrogen; Starch