CARBON-DIOXIDE FIXATION BY MICROALGAE PHOTOSYNTHESIS USING ACTUAL FLUE-GAS DISCHARGED FROM A BOILER

To mitigate the effects of carbon dioxide discharged from a boiler in a power plant, CO2 fixation by microalgae photosynthesis was studied. For the algae cultivation, actual flue gas from a boiler was used in t wo sets of small-sized raceway-type cultivators installed at Tohoku El ectric Power Company's Shin-Sendai power station. Using Nannochloropsi s sp. NANNP-2 and Phaeodactylum sp. PHAEO-2 strains from the SERI coll ection, the microalgae were cultured semicontinuously and harvested pe riodically. From the results of the field test, the productivity of bo th strains using direct flue gas was almost on a par with that of bomb ed CO2 gas. Therefore, it was clarified that the direct blowing of flu e gas into the cultivator did not adversely affect algal growth.