Flocculation Of Saccharomyces Cerevisiae With Grewiasppbiopolymers

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Authors

  • Ndi K. S. Industrial Filtration and Water Treatment (Chem. Eng.)Group, Department of Process Engineering, ENSAI, University of Ngaoundere, P.O.Box: 455, Ngaoundere, Cameroon
  • Kofa G. P. Industrial Filtration and Water Treatment (Chem. Eng.)Group, Department of Process Engineering, ENSAI, University of Ngaoundere, P.O.Box: 455, Ngaoundere, Cameroon
  • Ngnie P. Industrial Filtration and Water Treatment (Chem. Eng.)Group, Department of Process Engineering, ENSAI, University of Ngaoundere, P.O.Box: 455, Ngaoundere, Cameroon
  • Kameni Ngounoum. Bernard Industrial Filtration and Water Treatment (Chem. Eng.)Group, Department of Process Engineering, ENSAI, University of Ngaoundere, P.O.Box: 455, Ngaoundere, Cameroon
  • Kayem G. J. Industrial Filtration and Water Treatment (Chem. Eng.)Group, Department of Process Engineering, ENSAI, University of Ngaoundere, P.O.Box: 455, Ngaoundere, Cameroon
Vol. 1 No. 08 (2015): VOLUME 01 ISSUE 08
Articles
September 2, 2015

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 Removal of Yeasts (Saccharomyces cerevisiae) by coagulation/flocculation with natural extracted polymer from Grewiaspp plant originated from Maroua (Cameroon) was studied. Experiments were conducted in a jar-test at different pH [4,7.9], ionic strength [10-3, 10-2, 10-1 (M)], concentration of coagulant / flocculant (mg / L) [0.125-0. 25-0.375-0.5-0.625], turbidity [60NTU], and stirring speed / time [550s-1/5 min and 100s-1/15 min]. Results showed that maximum reduction rate (35%) was obtained forpH 4, ionic strength 10-1M, and polymer concentration of 0.375 mg / L. With CaCl2, removal rateof yeast improves up to 90%. Charge neutralization and adsorption at pH 7, adsorption and bridging at pH 4, and flocculation at pH 9 were identified asmechanisms involved in this process.