Sedimentation
The sedimentation is the process by which the solid substances suspended in water settle on the tank bottom, thanks to the force of gravity only.
The sedimented material is scraped, collected and conveyed out of the sedimentation tank.
There are two types of sedimentation.
The sedimentation of waste water, before the biological treatment (primary clarifiers) are equipped with bottom scrapers and a system to remove the floating material.
The sedimentation of water the biological treatment is called secondary sedimentation, and is equipped with a scraping or suction system.