Photobiological hydrogen production: Recent advances and state of the art |
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Authors: | Eroglu Ela Melis Anastasios |
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Institution: | a Centre for Energy, School of Mechanical and Chemical Engineering, The University of Western Australia, Crawley, WA 6009, Australia b University of California, Dept. of Plant and Microbial Biology, Berkeley, CA 94720-3102, USA |
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Abstract: | Photobiological hydrogen production has advanced significantly in recent years, and on the way to becoming a mature technology. A variety of photosynthetic and non-photosynthetic microorganisms, including unicellular green algae, cyanobacteria, anoxygenic photosynthetic bacteria, obligate anaerobic, and nitrogen-fixing bacteria are endowed with genes and proteins for H2-production. Enzymes, mechanisms, and the underlying biochemistry may vary among these systems; however, they are all promising catalysts in hydrogen production. Integration of hydrogen production among these organisms and enzymatic systems is a recent concept and a rather interesting development in the field, as it may minimize feedstock utilization and lower the associated costs, while improving yields of hydrogen production. Photobioreactor development and genetic manipulation of the hydrogen-producing microorganisms is also outlined in this review, as these contribute to improvement in the yield of the respective processes. |
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Keywords: | ATP adenosine triphosphate ETS electron transport system Fd ferredoxin hup&minus uptake hydrogenase deficient LHC light harvesting complex PAR photosynthetically active radiation PHB polyhydroxybutyrate PHB&minus PHB synthase deficient PNS purple non-sulphur PS1 photosystem 1 PS2 photosystem 2 TAP Tris-acetate-phosphate medium TAP-S (sulphur deprived) Tris-acetate-phosphate medium η light conversion efficiency |
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