| 摘要 |
A method of sewage treatment is disclosed which consists of the following described steps: Firstly, directing the sewage to be treated into a holding tank; secondly, subjecting the sewage in the holding tank to ultrasonic vibrations in a range between 15 and 150 kilohertz for a period in excess of 12 seconds thereby achieving cavitation of the sewage; thirdly, draining the liquids from the sewage; and fourthly, removing the sewage residue remaining after drainage of liquids.
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