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How to Select a Wastewater Dissolved Air Flotation System

2025-08-27

Selection Based on Water Quality Characteristics

  • Analyze wastewater's pollutant composition focusing on oil, grease, suspended solids, and colloids
  • For high oil content: select models with enhanced bubble adsorption and gel layer for hydrophobic properties
  • For high suspended solids: prioritize solid-liquid separation efficiency and high scum-carrying capacity
  • Consider pH value and temperature fluctuations for material compatibility

Matching the Equipment to the Scale of Treatment

  • Select specifications based on average daily volume and peak flow rate
  • Avoid underloading (wastes resources) or overloading (compromises performance)
  • Small-scale: integrated equipment (space-saving, easy operation)
  • Large-scale: modular designs (easy expansion and maintenance)
  • Include capacity reserve for temporary fluctuations in quality/volume

Suitable Type Based on Process Requirements

  • Select process type based on treatment objectives
  • Fine particle removal: pressurized dissolved air system (high efficiency)
  • Flocculation needed: combined system with pre-treatment agitator
  • High-viscosity wastewater: powerful water distribution and bubble cutting capabilities
  • Coordinate with subsequent treatment processes for quality compatibility

Evaluating Equipment Performance and Maintenance

  • Investigate bubble generation efficiency (uniform, stable size)
  • Focus on energy consumption and operating costs
  • Choose energy-saving dissolved air system and efficient scraping device
  • Evaluate maintenance ease (well-designed structure, few vulnerable parts)
  • Ensure materials are compatible with wastewater corrosiveness
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