원문정보
초록
영어
The biological reduction of carbon dioxide, one of the global warming gases, has been issued for last decade. Among the technology for biological CO2 reduction, photosynthetic bacteria and algae were mainly used for its reduction or fixation. However, there are many reports on the drawbacks of the photosynthetic bacteria for the CO2 reduction. Main drawbacks are the limitation of light transfer and the inhibition of CO2 itself for the reduction. In this study, we
employed methanogens to convert CO2 to methane with hydrogen gas. H2 is converted to methane with reducing CO2 in a novel hollow-fiber membrane biofilm reactor. All gases diffused into water through the membrane without bubbles. We have successfully operated the Hf-MBfR for stable methane production from CO2 and H2 under continuous operations over 70 days. The
conversion of CO2 depended on the pH conditions and the compositions of volatile fatty acids in liquid phase also changed by the pH conditions. It means that the microbial community could be affected by the operation condition. However, little is known about the autotrophic methanogen. We have performed DGGE and T-RFLP for bacterial and archaeal 16S rDNA to analysis of
microbial community in the reactor.