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

Jeong Hoon Park, Hyo Chang Cheon, Jeong Jun Yoon, Hee Deung Park, Sang Hyoun Kim

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

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 °C, solid/liquid (S/L) ratios of 5-15% (w/v), and H 2SO4 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 H2/L/hr and 37.0 mL H2/g dry biomass was found at 161-164 °C hydrolysis temperature, 12.7-14.1% S/L ratio, and 0.50% H 2SO4. The optimized dilute-acid hydrolysis would enhance the feasibility of the red algal biomass as a suitable substrate for hydrogen fermentation.

Original languageEnglish
Pages (from-to)6130-6136
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number14
DOIs
Publication statusPublished - 2013 May 10

Keywords

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

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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