| 摘要 |
<p>1512345 Aerobic treatment of waste water J CHATAIGNER and J C J RADER 13 May 1976 [15 May 1975] 19734/76 Heading C1C A waste water purifying device, comprises a single closed tank, a feeding pipe and an exhuast pipe, wherein the feeding pipe and the exhaust pipe include no movable parts, the lower and upper ends of the exhaust pipe being at respectively higher and lower levels than those of the corresponding ends of the feeding pipe, and further comprises a control valve for supplying air under pressure to a means for dispersing the said air in the water when the control valve is in a first position and to the upper part of the tank when the control valve is in a second position.</p> |
