GUNT demonstrates the removal of dissolved substances by precipitation and flocculation with subsequent sedimentation.
Product Features
- GUNT produces raw water containing dissolved metal (e.g. iron) in a tank
- A pump transports the raw water to the precipitation tank where a precipitant (e.g. caustic soda) is added
- Reaction between dissolved metal ions and precipitant forms insoluble metal hydroxides (solids)
- The water then flows into a flocculation tank divided into three chambers
- Coagulant is added in the first chamber to cancel repulsive forces between solid particles, promoting coagulation
- A flocculant is added in the second chamber to generate larger flocs
- The third chamber has low flow velocities to prevent turbulence, aiding floc formation
- The sedimentable flocs are separated from the treated water using a lamella separator
- Treated water and sedimented flocs (sludge) are collected in separate tanks
- Flow rate, temperature, and pH value are measured; pH in precipitation tank is controllable
- Conductivity is measured using an external meter
- Samples can be taken at all relevant points
- The tank cover is transparent for easy inspection of treated water
- Analysis technology is required to evaluate experiments, depending on substances used
- Common coagulants include trivalent metallic salts; common flocculants are organic polymers
Benefits
- GUNT demonstrates combined processes of precipitation, flocculation, and sedimentation
- Enables study of coagulation and flocculation kinetics and their impact on sedimentation
- Provides control and measurement of key parameters including pH, temperature, and flow
Why Choose GUNT?
This trainer offers practical insight into important water treatment steps, supporting hands-on understanding of chemical removal of dissolved metals and solids separation.
