| 摘要 |
The removal of organic and other solids from a dilute aqueous suspension, such as the secondary effluent from a sewage treatment plant, is accomplished by passing the effluent through a rotating fabric in a chamber, which results in depositing solids on the fabric that serves as a filter. Located within the chamber and disposed immediately adjacent the filter are ultrasonic transducers that function to remove the solids from the filter by setting up vibrations. The solids so removed are directed through a solids discharge pipe positioned adjacent the transducers. The transducer can be located in a number of positions within the chamber outside the drum, such as (1) below the level of the contaminated stream, but above the level of the clarified liquid and (2) below the liquid level of the clarified stream, or inside the drum. In the latter two positions, clarified liquid may move outwardly to assist in carrying away the solids removed from the screen.
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