AI Article Synopsis
- Hydrogen was produced from steam-exploded corn stover using a combination of two types of bacteria: Clostridium cellulolyticum (which breaks down cellulose) and Citrobacter amalonaticus (which produces hydrogen).
- The co-culture system achieved a high hydrogen yield of 51.9 L H2/kg total solid, significantly outperforming mono-culture systems.
- The process involved converting metabolites like formate into hydrogen while efficiently utilizing sugars (glucose and xylose) released from corn stover, maintaining low sugar levels that enhanced hydrogen production.
Article Abstract
Hydrogen was produced from steam-exploded corn stover by using a combination of the cellulolytic bacterium Clostridium cellulolyticum and non-cellulolytic hydrogen-producing bacteria. The highest hydrogen yield of the co-culture system with C. cellulolyticum and Citrobacter amalonaticus reached 51.9 L H2/kg total solid (TS). The metabolites from the co-culture system were significantly different from those of the mono-culture systems. Formate, which inhibits the growth of C. cellulolyticum, could be consumed by the hydrogen-evolving bacteria, and transformed into hydrogen. Glucose and xylose were released from corn stover via hydrolysis by C. cellulolyticum and were quickly utilized in dark fermentation with the co-cultured hydrogen-producing bacteria. Because the hydrolysis of corn stover by C. cellulolyticum was much slower than the utilization of glucose and xylose by the hydrogen-evolving bacteria, the sugar concentrations were always maintained at low levels, which favored a high hydrogen molar yield.
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| http://dx.doi.org/10.1016/j.jbiosc.2016.03.014 | DOI Listing |
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