Journal
BIOMASS & BIOENERGY
Volume 36, Issue -, Pages 241-249Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2011.10.024
Keywords
Microcystis aeruginosa; Two-staged hydrogen production; Sulfur deprivation; Immobilization; Carbon sources
Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0028163]
- Higher Education Commission (HEC) of Pakistan
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Two-staged bio-hydrogen production was investigated in Microcystis aeruginosa. Stage-I comprised aerobic growth of immobilized algal cells for three days while anaerobic conditions were established in stage-II by sulfur deprivation and photo inhibition under high light intensity. Hydrogen evolution was investigated under fully dark, fully light and partially dark conditions (24 h in dark and light thereafter) using diverse carbon sources and pH values. Full light proved to be most effective with a hydrogen volume of 490 +/- 3 ml/L at an average rate of 9.42 ml/h/L. The growth period could be reduced to 2 days in fully dark and fully light conditions. The hydrogen evolution was optimum at pH 9.0 with malt extract as carbon source for M. aeruginosa. However, the optimum pH value was lowered to 8.0 when optical fiber was used as an internal light source during stage-I. (C) 2011 Elsevier Ltd. All rights reserved.
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