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How effective is Air Flotation in wastewater treatment

2025-07-26

Air Flotation System Characteristics

1. Applicable Pollutant Types

  • Air Flotation has a good purification effect on wastewater containing large amounts of suspended particles, grease, or colloidal substances.
  • Shows significant separation effect for light pollutants difficult to remove by sedimentation.
  • Particularly effective for grease in food processing wastewater and dye particles in printing/dyeing wastewater.

2. Core Working Principle

  • Introduces tiny bubbles into the water to adsorb with pollutant particles.
  • Forms aggregates with density less than water that float to the surface.
  • Scum is removed by scraping equipment, separating pollutants from water.
  • Bubble-particle interaction is fundamental to the separation process.

3. Factors Affecting Performance

  • Water quality parameters: pH value and temperature.
  • Pollutant characteristics: concentration and nature.
  • Bubble size and distribution are critical factors.
  • Bubbles that are too small or uneven may not capture pollutants effectively.

4. Practical Application Performance

  • Often used in combination with other processes in treatment systems.
  • Effective in pretreatment stage to reduce burden on subsequent processes.
  • Improves overall wastewater treatment system efficiency.
  • Limited effectiveness for highly soluble pollutants alone.
  • Requires integration with other technologies for comprehensive treatment.
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