MMIJ ＆ EARTH 2017, Sapporo
Sep 26 - Sep 28, 2017Hokkaido University
MMIJ ＆ EARTH 2017, Sapporo
Sep 26 - Sep 28, 2017Hokkaido University
[1308-15-04]Biogenic Methane Generation from Lignite using Hydrogen Peroxide Solution in A Column Experiment
○Shofa Rijalul Haq1, Shuji Tamamura2, Akio Ueno2, Satoshi Tamazawa2, Takuma Murakami2, Noritaka Aramaki2, AKM Badrul Alam2, Toshifumi Igarashi1, Katsuhiko Kaneko2(1. Hokkaido University, 2. Horonobe Research Institute for the Subsurface Environment)
司会：羽柴公博（東京大学）
Chairman: Kimihiro Hashiba (University of Tokyo)
Chairman: Kimihiro Hashiba (University of Tokyo)
Keywords:
Lignite,Hydrogen peroxide,Column experiments,Organic acids,Microbially enhanced coalbed methane (MECBM)
Accelerated microbial transformation of coal into biogenic methane (CH4) is arousing interest globally after the reaction of the coal with hydrogen peroxide (H2O2), potentially contributing to "microbially enhanced coal bed methane (MECBM)". To evaluate the enhanced bioavailability of the coal, we investigated the effect of H2O2 solution on lignite in column experiments at different concentrations (0.3 and 3% H2O2) and flow rates (10 and 100 ml/day). The results showed that the highest dissolved organic carbon (the maximum 6,330 mg/l) and organic acids (i.e., acetic acid and formic acid, the maximum 612 and 1,810 mg/l, respectively) in the effluent solution of 3% H2O2-low flow rate (10 ml/day) were observed. Cultivation experiments of methanogens associated with lignite using 0.3% H2O2 solution showed the production of methane by methanogens at the concentration of 63.7 and 278 m3 CH4 per ton lignite after 18 and 35 days, respectively. These indicated the enhancement of the in-situ biogenic methane from chemically-solubilized lignite.