To provide a bacterium having ethanol-producing ability using a synthetic gas as a substrate, and a method for efficiently producing ethanol by using the bacterium.
Acetic acid/ethanol-producing bacteria have been investigated by culturing microorganisms in soil samples using H2 and CO2 as a substrate. The acetic acid/ethanol generation is ascertained through HPLC by collecting 50 kinds of soil samples from nation-widely various places and performing a batch culture in a complexing medium by use of H2 and CO2 as a substrate. In addition, a microbial flora stably producing higher concentration ethanol is determined by culturing the same using a H2-CO2 mixture gas as a substrate. The obtained flora is observed under a microscope to identify at least two kinds of bacteria, and therefore a single bacterium is obtained by a roll tube method. Namely, it has been succeeded in obtaining the bacterium having ethanol-producing ability by using the synthetic gas as a substrate.
NAKASHIMADA YUTAKA
NIKAIDO TERUYUKI
YAMAMOTO HIROAKI
MATSUMOTO AKIKO
KAWADA NAOKI
DAICEL CORP
Masao Haruna
Hirotaka Yamaguchi
Toshi Gobe
Ryuichi Inoue
Toshimitsu Sato
Koichi Niimi
Tomohiko Kobayashi
Shinichi Watanabe
Masato Ozeki
Yoshihiro Igarashi
Kazuya Kawamoto