| 摘要 |
<p>1,149,656. Activated sludge process. UNION TANK CAR CO. 13 July, 1966 [25 Aug., 1965], No. 31401/66. Heading C1C. A sewage treatment apparatus comprises an aeration zone 30, an energy absorption or quiescent zone 60, a second aeration zone 40, a settling zone 80 and an aerobic digestion zone 40, a settling zone 80 and an aerobic digestion zone 120. Sludge is returned to the second aeration chamber via mouth 43. The transfer of liquid and sludge is controlled by gates 154, 77, 65 and 67. Provision is made for skinning off the scum in chamber 80.</p> |
