In sedimentation plants, water constituents are separated by settling. The sedimentation is based on the fact that the dispersed water ingredient has a greater density than the water and sinks under the influence of the gravitational force. If the water constituents are present in colloidal or finely suspended form, flocculants are generally added in order to improve sedimentation and to shorten the residence time of the water in the settling plant. Otherwise, uneconomically long residence times and large sedimentation plants (volumes) would be required.
- Removal of removable substances
Settling tanks with scraper without flocculation