Process for the flocculation of suspended particles in a liquid and application to the recovery of vegetable microalgae and zoological plankton, and to the purification of waste water

摘要

A first liquid comprising microscopic particles in suspension is passed through a granular medium in a fixed bed (2) until said granular medium is partially or completely clogged by said microscopic particles, said granular medium is at least partially unclogged in causing it to pass through a second liquid, circulating in the same direction as the first liquid, but at a speed greater than the latter, and recovering downstream of said bed, flocculated aggregates (4) of said microscopic particles and an effluent liquid (6).