Journal of Applied Phycology

, Volume 8, Issue 2, pp 163–169 | Cite as

Mixotrophic growth ofChlorella sorokiniana in outdoor enclosed photobioreactor

  • Yuan-Kun Lee
  • Sun-Yeun Ding
  • Chye-Hock Hoe
  • Chin-Seng Low
Article

Abstract

Chlorella sorokiniana was cultured in heterotrophic or mixotrophic mode in outdoor enclosed tubular photobioreactor. The culture temperature was maintained at 32–35 °C. At night, theChlorella culture grew heterotrophically, and 0.1 M glucose was completely consumed. The biomass growth yield of glucose was 0.35 ± 0.001 g-biomass g-glucose−1. During the day, the algal culture grew mixotrophically and the biomass growth yield was 0.49 g-biomass g-glucose−1 in low density culture (initial biomass concentration, Xo = 2 g l−1), 0.56 g-biomass g-glucose−1 in medium density culture (Xo = 4 g l−1) and 0.46 g-biomass g-glucose−1 in high density culture (Xo = 7 g l−1). The daily area productivity of the culture, with Xo = 4 g l−1 corresponded to 127 g-biomass m−2 d−1 during the day and 79 g-biomass m−2 d−1 during the night. In all the cultures, the dissolved O2 concentration increased in the morning, reached the maximum value at noon, and then decreased in the afternoon. The dissolved CO2 concentration remained at 3 mBar in the morning and increased in the afternoon. Glycolate was not found to accumulate in culture medium.

Key words

mixotrophic photosynthetic Chlorella outdoor culture enclosed photoreactor 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Yuan-Kun Lee
    • 1
  • Sun-Yeun Ding
    • 1
  • Chye-Hock Hoe
    • 1
  • Chin-Seng Low
    • 1
  1. 1.Department of MicrobiologyNational University of SingaporeSingapore

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