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- Title
Hydrogen Production by Photoreactive Nanoporous Latex Coatings of Nongrowing Rhodopseudomonas palustrisCGA009.
- Authors
Jimmy L. Gosse; Brian J. Engel; Federico E. Rey; Caroline S. Harwood; L. E. Scriven; Michael C. Flickinger
- Abstract
Nonuniform light distribution is a fundamental limitation to biological hydrogen production by phototrophic bacteria. Numerous light distribution designs and culture conditions have been developed to reduce self-shading and nonuniform reactivity within bioreactors. In this study, highly concentrated (2.0 à 108CFU/L formulation) nongrowing Rhodopseudomonas palustrisCGA009 were immobilized in thin, nanoporous, latex coatings. The coatings were used to study hydrogen production in an argon atmosphere as a function of coating composition, thickness, and light intensity. These coatings can be generated aerobically or anaerobically and are more reactive than an equivalent number of suspended or settled cells. Rhodopseudomonas palustrislatex coatings remained active after hydrated storage for greater than 3 months in the dark and over 1 year when stored at â80 °C. The initial hydrogen production rate of the microphotobioreactors containing 6.25 cm2, 58.4 m thick Rps. palustrislatex coatings illuminated by 34.1 PAR mol photons m-2s-1was 6.3 mmol H2m-2h-1and had a final yield of 0.55 mol H2m-2in 120 h. A dispersible latex blend has been developed for direct comparison of the specific activity of settled, suspended, and immobilized Rps. palustris.
- Subjects
HYDROGEN; LATEX; SURFACE coatings; RHODOPSEUDOMONAS
- Publication
Biotechnology Progress, 2007, Vol 23, Issue 1, p124
- ISSN
8756-7938
- Publication type
Article
- DOI
10.1021/bp060254+