FIELD: environment control. SUBSTANCE: this relates to ecology of surface water sources. According to method, air bubbles are created by means of aerator with holes. Air bubbles are introduced into water flow duct with spiral input of water. Water flow duct terminates in circumference of water delivery to inlet vane device of impeller of hydraulic machine. Are bubbles are delivered differentially that is minimum through two longitudinal zones of air flow duct. Aforesaid zones terminate in part of circumference of air delivery to inlet vane device of impeller. Amount of air delivered in time unit in each of separate zones is directly proportional to central embracing angle of part of delivery circumference supplied by actual zone. Method helps restore ecological balance of water stream. EFFECT: higher efficiency. 1 dwg
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