| 摘要 |
<p>PURPOSE:To make manufacturing cost, installation space, and running and maintenance cost of an activated-sludge treatment apparatus advantageous by communicating the middle parts of a higher tub and a lower tub and bottom parts of the higher tub and the lower tub respectively with pipes tilting downward and setting a wastewater supplying inlet and a gas jetting apparatus in the bottom part of the higher tub and setting a treated water discharging outlet in the tip part of the lower tub. CONSTITUTION:Two cylindrical tubs with different height are installed and the higher tub is used as an aeration tank 1 and the lower tub is used as a precipitation tank 4 for precipitating and separating activated-sludge. The aeration tank 1 is made sufficiently high to carry out deep layer aeration treatment and object wastewater of treatment is sent from a wastewater supplying inlet 2 in the bottom part of the aeration tank 1 and aeration is carried out by a gas jetting apparatus 3 and only the aeration-treated water is led to flow the precipitation tank 4 passing a transporting pipe 6 tilting downward and activated-sludge is precipitated in the precipitation tank 4. In the precipitation tank 4, the treated water separated from the activated-sludge overflows out of the discharge outlet 5 in the upper part and the precipitated activated- sludge is returned to the aeration tank 1 passing the returning pipe 7 tilting downward.</p> |
