english Flotation Water Treatment Principles
The core principle of flotation water treatment lies in utilizing the interaction between gas bubbles and suspended or colloidal pollutants in water to achieve solid-liquid separation.
Core Principle & Mechanism
- Utilizes interaction between gas bubbles and suspended/colloidal pollutants
- Leverages density difference between bubble-pollutant aggregates and water
- Enables aggregates to rise to water surface for removal
- Achieves effective solid-liquid separation
This technology leverages the difference in density between the bubble-pollutant aggregates and water, enabling the aggregates to rise to the water surface for removal, thereby purifying the water.
Bubble Generation
- Process starts with generation of fine gas bubbles
- Small bubble size provides large specific surface area
- Facilitates sufficient contact with pollutants
- Microbubbles disperse uniformly in water
Common methods include dissolving air in water under pressure and then releasing pressure to form microbubbles, or inducing air through mechanical agitation.
Pollutant Attachment
- Key step is attachment of pollutants to bubbles
- Influenced by surface properties of pollutants and bubbles
- Hydrophobic pollutants attach easily to gas bubbles
- Hydrophilic pollutants may require flocculants or collectors
When pollutants attach to the bubbles, they form aggregates that are less dense than water.
1
Bubble Generation
2
Pollutant Attachment
3
Aggregate Formation
4
Buoyant Separation
Separation & Applications
- Bubble-pollutant aggregates rise to water surface due to buoyancy
- Forms a foam layer that can be continuously scraped off
- Leaves underlying water purified
- Relies on effective combination of bubble generation, attachment, and buoyancy-driven separation
The entire process relies on the effective combination of bubble generation, pollutant attachment, and buoyancy-driven separation, which together constitute the fundamental mechanism of flotation water treatment.
Primary Applications
Wastewater Treatment Water Purification Industrial Effluent Treatment Mineral Processing Oil-Water Separation
