Investigations on the flotation of yeast cells by colloidal gas aphron (CGA) dispersions

M A Hashim, Bhaskar Sen Gupta  , M B Subramaniam

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Flotation of microorganisms by colloidal gas aphrons (CGA) is recognised as an inexpensive and effective method of separation. CGAs are micron-sized gas bubbles of 25 μm in average diameter and each is encapsulated in an aqueous shell of surfactant solution. The flotation process involves the formation of microorganism-bubble complexes by adsorption mechanism and their subsequent flotation to the surface. The present work is devoted to the study of two important parameters, namely sparging rate of the CGAs and operating height on the concentration of yeast cells in a flotation column. A statistical analysis in the form of two-way cross-classification of parameters has been made to assess their impact and mutual interactions. The information will be useful for design and scale-up studies.
Original languageEnglish
Pages (from-to)167-173
Number of pages7
Issue number3
Publication statusPublished - Jun 1995


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