FIELD: water-development works. SUBSTANCE: flow of water laden with waste and young fish enters zone of action of air bubble screen crated by perforated air line 1. Waste and young fish are carried to surface of water flow 2 by small air bubbles where they are entrapped by fish discharge chute 4 made of flexible perforated material and are discharged towards waste-and-fish discharge line. Watertight wall 5 mounted after chute 4 takes up main hydrodynamic load of the flow. EFFECT: enhanced reliability. 2 cl, 3 dwg
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