Collaboration research of JAEA and AIST; Evaluation methods on microbial activity and geochemical condition

Ito, Kazumasa*; Togo, Yoko*; Hirota, Akinari*; Suzuki, Yohei*; Fukuda, Akari*; Omori, Kazuaki; Hasegawa, Takashi; Iwatsuki, Teruki  

Microbial metabolism and the chemical buffer capacity in deep groundwater were estimated at Mizunami underground research laboratory. The results show that sulfate reducing bacteria uses hydrogen gas. The sulfate consumption rate is important index to infer the redox buffer capacity in deep underground.