This research aims to study the potential of tropical planktonic microalgae isolated from water around Bogor for atmospheric CO2 bioremedial agent. The experiment was carried out by means of laboratory scale batch monoculture of phytoplankton Chlorella vulgaris and Ankistrodesmus convulutus grown based on PHM medium in transparent plastic bottles with variation of athmospheric CO2 concentration from ambient natural athmospheric concentration (0.05 persen v/v) up to 10.00 persen v/v by means of daily pure CO2 gas addition. The result shows that increase in athmospheric CO2 up to 1.,00 persen v/v stimulated the productivity of these two phytoplanktons, in which the highest biomass yields was achieved at CO2 concentration of 10.00 persen v/v. In that highest biomass yield condition the CO2 absorption rate was 1.91 g CO2/l/day in C vulgaris culture and 3.41 g CO2/l/day in A convulutus culture. The decrease in biomass/chlorophyll ratio with CO2 concentration indicated the excessive chlorophyll synthesis in phytoplanktons in respond to high CO2 concentration which emphasizes the importance of high light intensity to stimulate CO2 absorption as well as to increase the productivity in phytoplankton cultures.
Limnotek, Vol. XIII, No. 1.
(2006)
v. 5.5 build 477-5fc0150
