Patent ID: 6524486
Filing Date: 2003-02-25
Classification: B01D,B03D,C02F,C12M,Y02W

Abstract:
A method for the separation of dry biomass from an aqueous solution of microalgae, while maintaining the integrity of the cell structure, comprising the steps of:a) obtaining an aqueous suspension of the algae from a source thereof; b) adding a flocculating agent causing flocculation of the microalgae in suspension; c) introducing said flocculated suspension into a froth flotation column; d) dispersing a gas into fine bubbles for contact with said flocculated suspension; e) adsorbing said flocculated microalgae onto said bubbles to form bubble and algae agglomerates; f) forming, in an adaptable height column, a layer of froth containing said bubble and algae agglomerates; g) removing said froth containing bubble and algae agglomerates from said flotation column via an overflow outlet, by adjusting said column height; and h) further drying said froth.