P-08　生物メタネーションによるバイオガス発酵内のメタン濃度向上

抄録

Methane fermentation is currently attracting attention as a viable form of renewable energy in Japan. However, methane fermentation has a problem of low energy efficiency due to low methane concentrations. Finding a solution, at present, is of utmost importance. Therefore, in this study, we worked on experiments that would improve methane concentration in biogas produced using biological methanation methane fermentation. In this specific method of methane fermentation, adding a biological methanation was aimed to improve the methane concentration in the generated biogas. Methanation is a technique that turns hydrogen and carbon dioxide into methane and water by using methane-producing bacteria or metals. As a result of the experiment, in which we used cow manure as a seed bacteria for the methane fermentation, 3L of cow manure allowed for a consumption limit of 0.5L of hydrogen per week. It was found that methane concentration increased by 5% by adding 0.5L of hydrogen per week. The amount of methane obtained by methanation in this experiment, in terms of concentration, made it possible to show the expected value.