Abstract
The tri-generation system with a diesel engine of heat, electric, and CO_2 has several advantages, including high energy efficiency and reduction of GHG emission by production on green fuel derived from biomass stored CO_2 from engine exhaust. The objective of this study is to be clear the effect of enriched CO_2 aeration, which simulated engine exhaust gas, in cultivation on cell density and algal-oil production of microalgae. In experiment, the microalgae, Scenedesmus dimorphus, was cultivated in 1 liter tubular photobioreactors at room temperature and two case of enriched CO_2 aeration; one is a concentration of 10%-CO_2 for 1.5 hours per day and another is 8.3%-CO_2 for all day. And, nitrogen monoxide(NO) which simulated engine exhaust gas was also supplied by aeration. The results show that the aeration of enriched CO_2 for 1.5 hours per day is effective to increase algal cell density and algal-oil production. And, it was found that the aeration with NO causes the algal cell density and algal-oil production.
