CE 587 demonstrates the clarification of raw water containing solids using the dissolved air flotation process.
Product Features
- A suspension (raw water) is prepared in a tank
- Raw water flows into a flocculation tank divided into three chambers
- Coagulant is added in the first chamber to cancel repulsive forces between solid particles and form flocs
- Flocculant is added in the second chamber to create larger flocs
- Caustic soda can be added to increase pH after coagulant lowers it
- The third chamber has low flow velocities to prevent turbulence and support floc formation
- Raw water then enters the flotation tank where part of the treated water is saturated with air under pressure (recycle water)
- Recycle water expands suddenly to atmospheric pressure creating minute air bubbles that attach to flocs, causing them to rise to the surface
- Scraper moves floating flocs (float) into a collection channel
- Flow rates, pressures, and pH values are measured and pH can be controlled
- Pressure of recycle water can be adjusted
- Trivalent metallic salts are recommended as coagulants
- Common flocculants are organic polymers
- Powdered activated carbon can be used to produce the raw water
Benefits
- Effective demonstration of dissolved air flotation for water clarification
- Adjustable process parameters allow detailed study of flotation efficiency
- Measurement and control of pH, flow, and pressure enable precise process monitoring
Why Choose This Trainer?
This trainer provides hands-on experience with dissolved air flotation, a key water treatment process for removing solids through flotation and separation.
