Abstract
Microbial conversion of lignocellulose to hydrogen is a fascinating way to provide a renewable energy source. A mesophilic bacterium strain G1 that had high cellulose degradation and hydrogen production activity (2.38 mmol H(2) g(-1) cellulose) was isolated from rumen fluid and identified as the Enterococcus gallinarum. Hydrogen production from cellulose by using sequential co-cultures of a cellulosic-hydrolysis bacterium G1 and Ethanoigenens harbinense B49 was investigated. With an initial Avicel concentration of 5 g l(-l), the sequential co-culture with G1 and strain Ethanoigenens harbinense B49 produced H(2) yield approximately 2.97 mmol H(2) g(-1) cellulose for the co-culture system.
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