Tuesday, May 1, 2012
Napoleon Ballroom C-D, 3rd fl (Sheraton New Orleans)
Biomass-derived syngas is a versatile feedstock for renewable fuel production. Biological conversion of carbon monoxide via water gas shift reaction has potential to generate renewable hydrogen, although mass transfer and yields are limiting commercial consideration. Here, we report improved bioreactor design to enhance conversion of carbon monoxide. The effect of various operating parameters was studied to determine physical and biological limitations. Rhodospirillum rubrum was used as the model organism for these studies. Effect of light was also studied to understand bioenergetics of conversion process. Production of biofuel intermediates via metabolic intermediates from syngas was also studied using this model system. Effect of CO flow rate and other parameters on biocatalyst growth and product yield was investigated. Strategies on enhancement of conversion of syngas to biohydrogen and other intermediates will be presented.