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Title: Engineering photosynthetic organisms for the production of biohydrogen

Oxygenic photosynthetic organisms such as green algae are capable of absorbing sunlight and converting the chemical energy into hydrogen gas. This process takes advantage of the photosynthetic apparatus of these organisms which links water oxidation to H2 production. Biological H2 has therefore the potential to be an alternative fuel of the future and shows great promise for generating large scale sustainable energy. Microalgae are able to produce H2 under light anoxic or dark anoxic condition by activating 3 different pathways that utilize the hydrogenases as catalysts. In this review, we highlight the principal barriers that prevent hydrogen production in green algae and how those limitations are being addressed, through metabolic and genetic engineering. We also discuss the major challenges and bottlenecks facing the development of future commercial algal photobiological systems for H2 production. Lastly we provide suggestions for future strategies and potential new techniques to be developed towards an integrated system with optimized hydrogen production.
 [1] ;  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0166-8595
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Photosynthesis Research
Additional Journal Information:
Journal Volume: 123; Journal Issue: 3; Related Information: Photosynthesis Research; Journal ID: ISSN 0166-8595
Research Org:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
09 BIOMASS FUELS green algae; H2 metabolism; hydrogenases; electron transfer; genetic engineering