| 초록 |
The bioconversion of carbon monoxide (CO), one of major components of synthesis gas, can provide a process for production of intermediate chemicals such as acetate. Sporomusa ovata, acetogenic bacterium, is not available to utilize CO directly, whereas CO2 and H2 are used to produce acetate by S. ovata. In this study, we tried to produce acetate from CO by a co-culture system composed of S. ovata and C. amalonaticus Y19 which has high activity CODH and hydrogenase from CO as the sole external carbon source. The production of CO2 and H2 by C. amalonaticus Y19 from CO enabled the acetate production by S. ovata. The higher acetate production was obtained from the co-culture system without inhibition in growth as compared with monoculture of C. amalonaticus Y19. This results show that syntrophic culture makes great advantages of using CO as feedstock of acetate production, suggesting the models for CO conversion bacteria which can survive and grow in CO condition even it has low CODH activity. |
