| 摘要 |
A method and apparatus is disclosed for treating a contaminated liquid, the method comprising feeding said liquid to a treatment tank containing a treatment medium in the form of a filtration membrane or a reactive surface, applying a pressure differential to the treatment tank to draw said liquid through the treatment medium, and discharging the resultant treated liquid in the treatment tank, wherein said pressure differential is actuated upon said treatment tank reaching a predetermined head pressure or level. The discharge tank has a pump adapted to provide a backwash to the treatment medium, thereby to pump the treated liquid to the discharge tank. The discharge pump is activated when the treatment tank reaches a predetermined level thus removing liquid from the discharge tank and creating a pressure differential therebetween.
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