For a Solar Biotechnology Based on Microalgae

  • C. Gudin
  • D. Chaumont
Part of the Solar Energy R&D in the European Community book series (SRDE, volume 1)

Summary

The initial target was to establish the maximum biomass production per unit of time and surface in combining photosynthetic bacteria and microalgae in double layer systems of cultivation. Having shown this technological possibility we have concentrated our effort on setting up a fully automatic system of microalgae monoculture with record and control of all parameters
  1. 1)

    Yearly average obtained for a complete year is 20.9 g/m2/day corresponding to a photoconversion yield of 4 %.

     
  2. 2)

    In mediterranean sunlight conditions the theoretical maximum based on a 6.6. % photoconversion yield would be 34.5 g/m2/day as a yearly average.

     
  3. 3)

    Energetic evaluation of the production leads to a value < 1, showing no beneficial fixation of energy.

     
  4. 4)

    Economic evaluation of production cost indicates a cost of — 5 FF/kg of biomass.

     
Keeping in mind these 4 conclusions our recent targets have been :
  1. 1)

    To developp all technologies able to improve drastically the fixation of energy.

     
  2. 2)

    To select strains able to give a final product 10 FF/kg

     
To reach the 1st target, we have started
  1. 1)

    a 3 steps experimental programme (June 81 June 84) on 1 m2, 10 m2 and 100 m2 pilot plant tubular cultivator.

     
  2. 2)

    a new technological way based on “cells immobilized on a support” for production of an exocellular biomass.

     
In the frame work of the 2nd target we have selected 2 types of strains :
  1. 1)

    Red microalgae producing high value polysaccharides (exocellular biomass) and cellular biomass for methanisation (cooperation with ESE/021 B)

     
  2. 2)

    Botryococcus braunii (cooperation with ESE/003/F) producing exocellular hydrocarbons and cellular biomass for methanisation.This project will go on from the 1st June of 81 in the new “Solar Biotechnological Unit” set up by C.E.A. in Cadarache (Biological Department Radio Agronomie Service) Saint-Paul-lez-Durance — 13115 — France.

     

Keywords

Biomass Methane Urea Hydrocarbon Polysaccharide 

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References

  1. (1).
    C. Gudin & col.-Rev. Internat. D’Heliotech, COMPLES- 2e semestre 1980, p. 55 to 62.Google Scholar
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    C. Gudin & col.-Biochem. Soc. Transactions 8 (4) p. 481–482 (1980).Google Scholar
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    C. Gudin & col.-Energy from biomass inter, conf. Brighton 1980. “new concepts in solar biotechnology”.Google Scholar
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    C. Gudin & col.-EC solar energy. Project E International report of ESE/007/F of the work from June 78 to June 80 (partly published in (1))Google Scholar
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    C. Zarrouk -Contribution a l’étude de Spirulina maxima (Thèse de Doct. Sc. appl. Paris 1966 ).Google Scholar
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    C. Gudin & D. Thomas –“Mise au point d’un biophotoreacteur à P. cruentum produisant des polysaccharides”. C.R. Ac. Sc. (Juin 1981) (sous presse).Google Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1981

Authors and Affiliations

  • C. Gudin
  • D. Chaumont

There are no affiliations available

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