Abstract
A photosynthetic bacterium having ability to produce H-2 from acetic, butyric and
lactic acids, Rhodobacter sp. M-19 was isolated. H-2 was produced from
starch in a batch culture by Clostridium butyricum and in a two-step
batch culture by C. butyricum and Rhodobacter sp. M-19 in yields
of 1.9 and 3.6 mol H-2/mol glucose, respectively. A mixed culture
of C. butyricum and Rhodobacter sp. M-19 produced H-2 from starch
with a yield of 6.6 mol H-2/mol glucose in a fed-batch culture.
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