| 摘要 |
A scum removing unit for wastewater flotation tank includes a driving element; a shaft mechanism being driven by the driving element to rotate and having a rotating element mounted thereon; and a suspension arm being associated with the rotating element. The suspension arm has a lower end extended into a wastewater flotation tank and having at least one scraper fixed thereto. When the rotating element is rotated, the suspension arm is brought to move along a predetermined path, and the scraper at the lower end of the suspension arm is caused to scrape off scrum in the wastewater flotation tank along the predetermined path. Except for the scraper, all the parts of the scum removing unit are not in contact with the scum, protecting the scum removing unit against rust and resultant damage.
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