Lumostatic operation controlled by the optimum light intensity per dry weight for the effective production of Chlorella zofingiensis in the high cell density continuous culture

作者：Imaizumi Yuki; Nagao Norio^*; Yusoff Fatimah Md; Kurosawa Norio; Kawasaki Nobuyuki; Toda Tatsuki

来源：Algal Research-Biomass Biofuels and Bioproducts, 2016, 20: 110-117.

DOI：10.1016/j.algal.2016.09.015

• Lumostatic operation
• Chlorella zofingiensis
• High-cell-density culture
• Light intensity per dry weight
• Continuous culture

To maximize the production rate of Chlorella zofingiensis, a lumostatic continuous culture was operated under light intensities of 250-1510 mu E m(-2) s(-1). The cell density and volumetric biomass production rate were increased without photo inhibition and reached 13.5 g-dry weight (dw) L-1 on day 21.5 and 2.41 g-dw L-1 day(-1) on day 10.5, respectively. These maximum values were higher than any previous photoautotrophic culture study with C. zofingiensis. The specific growth rate was maintained at a high level > 0.5 day(-1) until the light intensity per dry weight decreased below 28 mu E g-dw(-1) s(-1), which coincided with the value estimated in our previous study, verifying the reliability of this estimated value. There was a strong relationship between the photosynthetic efficiency and light intensity per dry weight for C. zofingiensis. This relationship may be useful for evaluating species-specific productivity to select productive species.

• 出版日期2016-12