Abstract
Effects of turbulent energy dissipation rate (increased from 1.28 × 10-6 to 1.67 × 10-5m2s-3) on Scenedesmus obliquus biomass and lipid accumulation at different aeration rates (0.3, 0.6, 0.9, 1.2, and 1.5Lmin-1) were investigated. The turbulent energy dissipation rate was calculated by CFD model simulation. When the turbulent energy dissipation rate increased to 7.30 × 10-6m2s-3, the biomass and lipid productivity increased gradually, and finally reached their maximum values of 1.11 × 107 cells mL-1 and 16.0mgL-1day-1, respectively. When it exceeded 7.30 × 10-6m2s-3, the biomass and lipid productivity showed a decreasing trend. Therefore, the most favorable turbulent energy dissipation rate for S. obliquus growth and lipid accumulation was 7.30 × 10-6m2s-3.
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