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두 종 미세 녹조류의 연속배양을 통한 바이오매스 생산성 비교
김근호(Geun Ho Gim),이영미(Young Mi Lee),김덕진(Duk-Jin Kim),정상화(Sang-Hwa Jeong),김시욱(Si Wouk Kim) 한국생물공학회 2012 KSBB Journal Vol.27 No.2
In the present study, the biomass productivity of two green microalgae (Chlorella sp. and Dunaliella salina DCCBC2) were assessed in a 12 L tubular photobioreactor under optimum culture conditions. In the batch culture optimization process, the Chlorella sp. biomass was obtained as 1.2 g/L under atmospheric air as a sole CO₂ source and other culture conditions as follows: light intensity, temperature, pH, NH₄Cl and K₂HPO₄ were 100 μE/m²/s, 27℃, 7.0, 20.0 mM and 2.0 mM, respectively. On the other hand, 2.9 g/L of D. salina DCCBC2 biomass production was observed under the following conditions: light intensity, temperature, pH, KNO₃ and K₂HPO₄ were 80 μE/m²/s, 27℃, 8.0, 3.0 mM and 0.025 mM, respectively. At 1% CO₂ supply to the reactor, the Chlorella sp. production was reached 1.53 g/L with 25% increment under the same operating conditions. In addition, the maximum D. salina DCCBC2 biomass was observed as 3.40 g/L at 3% CO₂ concentration. Based on the aforementioned optimized conditions, the dilution rate and maximal biomass productivity of Chlorella sp. and D. salina DCCBC2 in the continuous cultivation were 0.4/d and 0.6 g/L/d and 0.6/d and 1.5 g/L/d, respectively.