Abstract:Aimed to investigate the feasibility of growing Chlorella sorokiniana outdoor in summer,a 6 L aerated vertical column photobioreactor was performed from Jun to Aug on the rooftop. When cultivated outdoor,algae auto-flocculation will happen heavily once pH was over 8.5. The photoinhibition caused by high incident light intensity(1 700±137 ?滋mol/(m2·s))and the algal cells damage resulted from high temperature(48 ℃) lead to inhibition of algal growth. Chlorella sorokiniana is not able to grow well when temperature is over 40 ℃. The installation of reflectors,which covered by reflective thermal insulation mental coatings,could decrease light intensity by 42.21±4.7%,resulting in 2~4 ℃ temperature decrease. However,light intensity still could be more than 900 ?滋mol/(m2·s) on sunny days,making photoinhibition hard to be relieved. To achieve faster algal growth as well as continuous cultivation outdoor,more effort should be made to moderate the light intensity.
