Clarification is the removal of suspended solids and particulate matter including sediments, oil, natural organic matter and colour from the water to make it clear. Clarification occurs in combination with coagulants and flocculants to improve settling.

A clarification step is the first part of conventional treatment for waste and surface water treatment, called screening. Screening involves protecting the downstream structure against large objects, which can create obstructions in the facility’s units. It removes and separates large matter carried along by raw water that might negatively affect the efficiency of later treatment procedures. The clarification process is often followed by filtration.
Applications of clarification techniques

  • Sedimentation
  • Fine filtration
  • Industrial effluent
  • Municipal wastewater
  • Specialized application for oil and grease removal in industrial effluents

WaterIcon specialises in Dissolved air flotation (DAF) techniques to clarify wastewater. This involves applying air to the water and under pressure, releasing the air bubbles which adhere to the suspended matter causing it to float to the surface. The matter can then be removed by a skimming device.

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