Journal
TRENDS IN BIOTECHNOLOGY
Volume 32, Issue 1, Pages 5-10Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tibtech.2013.11.001
Keywords
photosynthesis; solar energy; CO2 fixation; H-2-oxidizing bacterium; polyhydroxybutyrate; bio-based products
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Producing bio-based products directly from CO2 and solar energy is a desirable alternative to the conventional biorefining that relies on biomass feedstocks. The production paradigm is based on an artificial photosynthetic system that converts sunlight to electricity and H-2 via water electrolysis. An autotrophic H-2-oxidizing bacterium fixes CO2 in dark conditions. The assimilated CO2 is stored in bacterial cells as polyhydroxybutyrate (PHB), from which a range of products can be derived. Compared with natural photosynthesis of a fast-growing cyanobacterium, the artificial photosynthetic system has much higher energy efficiency and productivity of bio-based products. The new technology looks promising because of possible cost reduction in feedstock, equipment, and operation.
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