Abstract
Emission of greenhouse gases into atmosphere is becoming an international concern. Therefore, greenhouse-gas-emission reduction is a pressing subject. In particular, it is assumed that large plants diffuse the major quantity of gas emissions. A large amount of biogas is also emitted by methane fermented in sewage disposal plants. As methane and carbon dioxide with high greenhouse effect in biogas are 60% to 40%, respectively, reduction is indispensable. In this study, bubble-free gas dissolution apparatus is utilized to separate methane and carbon dioxide in the digestion gas, using methane as a fuel product while dissolving carbon dioxide into seawater is used for algae culturing, and then carbon dioxide is immobilized through the photosynthesis algae culturing. This process proposes a system to reduce and digestion gas and utilize it for algae industrial use.
