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High Density Outdoor Microalgal Culture

  • Jiří DouchaEmail author
  • Karel Lívanský
Chapter

Abstract

Despite the common use of open raceway pond technology for algae production, the system has many serious drawbacks resulting in low productivities and relatively high production costs. The key to higher yields and a cheaper product rests with the lowering of culture volume by decreasing the thickness of the algal layer exposed to the light. The higher the culture surface-to-volume ratio (S/V), the higher the culture density and the lower the cost of handling and harvesting. Basic parameters (light, temperature, mixing, carbon dioxide, oxygen, nutrition) affecting algal productivity in thin-layer (TL) photobioreactor have been assessed. In a low volume of vigorously mixed culture, utilization of light energy and algal yields are increased. Production costs are reduced to about one fifth (20 %) compared to raceways ponds.

Keywords

Microalgae Chlorella Culture parameters High density culture Open ponds Thin layer photobioreactor Productivity Photosynthetic efficiency Economic consideration 

List of Acronyms

DO

dissolved oxygen

dw

dry weight

EPDM

ethyl propylene dimer

PAR

photosynthetic active radiation

PE

photosynthetic efficiency

PUFA

polyunsaturated fatty acid

S/V

surface to volume ratio

TL

thin layer

Notes

Acknowledgements

The work was supported by the projects EUREKA of the Ministry of Education Youth and Sports of the Czech Republic (nos. OE 221 and OE 09025).

We wish to express our gratitude to BCS Engineering, a.s., Brno, Czech Republic for their fruitful technical cooperation.

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© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Laboratory of Cell Cycles of Algae, Institute of MicrobiologyAcademy of Sciences of the Czech RepublicTřeboňCzech Republic

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