| 摘要 |
<p>PURPOSE:To carry out efficiently the waste water treatment including denitrification by opening and closing a valve on the basis of a water level detected with a water level gauge, and selecting a suction pipe for discharging the supernatant water. CONSTITUTION:The original waste water is supplied into a treating tank 1 from a supply pipe 11, mixed by operating a mechanical agitator 2 with an appropriate amt. of treated water which is left in the treating tank 1 in the preceding cycle of the discharging stage, and anaerobically treated. Air is blown into the treated water in the treating tank 1 from an air sparger 3 by driving a blower 8, and the aeration and agitation are carried out. Thereafter, the blowing of air from the air sparger 3 is stopped, and the settling is carried out in the treating tank 1. Then the supernatant water is discharged from a suction pipe with a pump 7 by opening and closing valves 4, 4', and 4'', and selecting the suction pipe 5, etc. for discharging the supernatant water on the basis of the water level detected with a water level gauge 6.</p> |
