METHOD OF WATER CLARIFICATION Russian patent published in 1998 - IPC

FIELD: water treatment, in particular, methods of classification, thickening and separation of flocculated particles; may be used in mineral concentration for clarification of circulating water, and treatment of industrial, household potable waters and sewage waters. SUBSTANCE: after floatation separation of coagulated sludges, airfloccules and hydrophobic impurities and separation of solid particles, sludge floccules and hydrophilic impurities by their precipitation in aqueous medium, water is saturated with air bubbles by pneumohydraulic aerator with use of pressure water after preliminary electrochemical treatment directly before pneumohydraulic aeration, and repeated flotation separation of coagulated sludges, air floccules and hydrophilic impurities and separation of solid particles, sludge floccules and hydrophilic impurities by their precipitation in aqueous medium after which water is saturated with air bubbles with use of ozone-air mixture, and again remaining impurities are separated by similar manner. Water saturation with air bubbles by pneumohydraulic aerator and flotation separation of coagulated sludges, airfloccules and hydrophobic impurities are carried out in adjacent zones of one chamber separated by vertical perforated partitions with gap at their lower edges. Jet mixing of water performed by pneumohydraulic aeration is limited only by zones of its saturation with air bubbles without concerning the flotation zones. EFFECT: higher efficiency. 2 cl, 3 dwg