Coprecipitation of microalgal biomass with calcium and phosphate ions

A. Sukenik, W. Schröder, J. Lauer, G. Shelef, C. J. Soeder

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Algal cultures which tended to flocculate under alkaline conditions were investigated in order to define the flocculating agent. Under the electron microscope, cells appeared to be agglomerated by inorganic "amorphous" precipitates or rod shaped microcrystals. The use of an energy dispersive X-ray analyser showed that the agglomerating substance consisted of calcium and phosphorus and their atomic ratios varied between 1.07 and 1.34. The experiments suggest that in autoflocculation involving chemical coprecipitation with biomass, calcium phosphate constitutes the major binding agent. The Ca:P ratio in the precipitated calcium phosphate is greatly increased by raising alkaline conditions or increasing precipitation period.

Original languageEnglish
Pages (from-to)127-129
Number of pages3
JournalWater Research
Issue number1
StatePublished - 1 Jan 1985
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution


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