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Phosphorus release by pure cultures of Acinetobacter sp. : effect of the growth stage with cells cultivated on various carbon sources
Author(s) -
Rustrian E.,
Delgenes J.P.,
Moletta R.
Publication year - 1997
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1046/j.1472-765x.1997.00372.x
Subject(s) - phosphate , anaerobic exercise , phosphorus , butyric acid , substrate (aquarium) , chemistry , food science , acetic acid , carbon source , carbon fibers , biochemistry , biology , microbiology and biotechnology , organic chemistry , ecology , materials science , physiology , composite number , composite material
In order to understand biological phosphorus removal mechanisms, the role of growth stage and volatile fatty acids (VFA) on phosphate release in the anaerobic stage of P removal by three Acinetobacter strains was investigated. The phosphate release in anaerobic conditions was affected by the physiological state of cells and by the carbon source used. When the experiments were made with stationary growth phase cells, the release of phosphate was higher for all three strains cultured on acetic, propionic and butyric acid. Cells showed a limit to the amount of phosphate that could be released from total phosphate accumulated. Only 5–38% of P accumulated by the log cells and 18–58% of total P accumulated by stationary cells could be released. The ratio between the amount of P released and organic substrate removed under anaerobic condition varies depending on VFA types and tested strains.