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http://dx.doi.org/10.4491/KSEE.2011.33.7.511

Effect of Temperature, Light Intensity and pH on the Growth Rate of Chlorella Vulgaris  

Choi, Hee-Jeong (Department of Environmental Engineering, Kwandong University)
Lee, Seung-Mok (Department of Environmental Engineering, Kwandong University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.7, 2011 , pp. 511-515 More about this Journal
Abstract
The aim of this study was to investigate the efficiency of temperature, light intensity and pH on the growth rate of Chlorella vulgaris (C. vulgaris). The size of C. vulgaris (FC-16) was $3-8{\mu}m$, having round in shape. The cells of C. vulgaris (FC-16) was cultured in the Jaworski's Medium with deionized water. To evaluate the efficiency of temperature, light intensity and pH on the growth rate of C. vulgaris, six different fractions of temperature ($10^{\circ}C$, $15^{\circ}C$, $20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$, $35^{\circ}C$), various light intensities ($100-800{\mu}Em^{-2}s^{-1}$) and seven different fractions of pH (3, 4, 5, 6, 7, 7.5, 9) were prepared. The growth rate of C. vulgaris cultivation was approximately 5.2 to 5.5 times faster, the concentration of Chlorophyll a was also 5 to 5.5 times higher, and cell volume per unit area was 14% higher at $25^{\circ}C$ to $30^{\circ}C$ than those at $10^{\circ}C$. Therefore, the optimal temperature for cultivation of C. vulgaris was estimated $25^{\circ}C$ to $30^{\circ}C$. The growth rate of C. vulgaris increased slowly up to 5 days, exploded after 5 days until 15 days, and then stoped after that. The optimum cultivation period of C. vulgaris was estimated as 15 days. The optimum pH for the growth rate of C. vulgaris was determined pH 7 to 7.5.
Keywords
Chlorella vulgaris; Chlorophyll; Cultivation; Light Intensity;
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