The feasibility of mass cultivation of Porphyridium

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Abstract

The feasibility of growing Porphyridium biomass outdoors was investigated. Laboratory studies indicated that although the optimum temperature for growth is 25°C no damage to the photosynthetic activity can be detected after exposure of the organism to higher temperatures, up to 35°C. Also, high O2 evolution activity was observed even at relatively high cell concentrations. No inhibition of O2 evolution was detected at high light intensity, i.e. 2000 μE m-2 s-1. In cultures grown outdoors an output rate of up to 22 g dry wt m-2 day-1 was obtained for several weeks. The biomass contained, on a dry weight basis, up to 40% polysaccharides and about 1·5% arachidonic acid. The cultures were maintained essentially monoalgal for over 3 months. The biomass can be readily removed from the medium by autoflocculation.

Original languageEnglish
Pages (from-to)13-25
Number of pages13
JournalBiomass
Volume8
Issue number1
DOIs
StatePublished - 1 Jan 1985

Keywords

  • Porphyridium
  • algal biomass
  • arachidonic acid
  • outdoor algal ponds
  • photosynthesis
  • polysaccharides

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