FIELD: systems for water aeration at purifying sewage. SUBSTANCE: apparatus includes tank, aeration tubes with cone nozzles, distributing chambers. In each distributing chamber there are syphon sleeve with discharging pipe and air regulating sleeve with hydraulic lock. Air pipe of syphon sleeve is joined with air regulating sleeve. Lower end of discharging pipe is in the form of narrowed jet and it is arranged coaxially in cone nozzle of aeration tube for forming annular slit. EFFECT: increased rate of liquid motion in aeration tube, possibility for creating pressure escaping of working stream without additional energy consumption for liquid pumping. 2 cl, 4 dwg
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