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논문 기본 정보

자료유형
학술저널
저자정보
Yong Sang Kim (University of Guam) Sang-Hun Lee (Keimyung University)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제23권 제2호
발행연도
2018.6
수록면
216 - 222 (7page)

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초록· 키워드

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The growth characteristics of Spirulina platensis were investigated using four photo-bioreactors with CO₂-mixed air flows. Each reactor was operated under a specific condition: 3% CO₂ at 50 mL/min, 3% CO₂ at 150 mL/min, 6% CO₂ at 50 mL/min, and 6% CO2 at 150 mL/min. The 3% CO₂ at 150 mL/min condition produced the highest algal growth rate, while the 6% CO₂ at 150 mL/min conditioned produced the lowest. The algal growth performance was suitably assessed by the linear growth curve rather than the exponential growth. The medium pH decreased from 9.5 to 8.7-8.8 (3% CO₂) and 8.4-8.5 (6% CO₂), of which trends were predicted only by the pH-carbonate equilibrium and the reaction kinetics between dissolved CO₂ and HCO₃<SUP>-</SUP>. Based on the stoichiometry between the nutrient amounts and cell elements, it was predicted that depleted nitrogen (N) at the early stage of the cultivation would reduce the algal growth rates due to nutrient starvation. In this study, use of the photobioreactors capable of good light energy distribution, proper ranges of CO₂ in bubbles and medium pH facilitated production of high amounts of algal biomass despite N limitation.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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