BioChem - DOS

Optimization of batch dilute-acid hydrolysis for biohydrogen production from red algal biomass

International journal of hydrogen energy

Park, J.H.; Cheon, H.C.; Yoon, J.J.; Park, H.D.; Kim, S.H.

Marine algae are promising alternative sources for bioenergy including hydrogen. Their polymeric structure, however, requires a pretreatment such as dilute-acid hydrolysis prior to fermentation. This study aimed to optimize the control variables of batch dilute-acid hydrolysis for dark hydrogen fermentation of algal biomass. The powder of Gelidium amansii was hydrolyzed at temperatures of 120-180 <SUP>o</SUP>C, solid/liquid (S/L) ratios of 5-15% (w/v), and H<SUB>2</SUB>SO<SUB>4</SUB> concentrations of 0.5-1.5% (w/w), and then fed to batch hydrogen fermentation. Among the three control variables, hydrolysis temperature was the most significant for hydrogen production as well as for hydrolysis efficiency. The maximum hydrogen production performance of 0.51 L H<SUB>2</SUB>/L/hr and 37.0 mL H<SUB>2</SUB>/g dry biomass was found at 161-164 <SUP>o</SUP>C hydrolysis temperature, 12.7-14.1% S/L ratio, and 0.50% H<SUB>2</SUB>SO<SUB>4</SUB>. The optimized dilute-acid hydrolysis would enhance the feasibility of the red algal biomass as a suitable substrate for hydrogen fermentation.

2013

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

38

14

pp.6130-6136

10.1016/j.ijhydene.2013.01.050

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65883676

Marine algal biomass; Dilute-acid hydrolysis; Dark hydrogen fermentation; Hydrolysis temperature; Sulfuric acid concentration; Solid/liquid ratio (S/L ratio)