Clarification Process Selection

The most appropriate clarification process for a particular application depends on the water to be treated and the requirements and circumstances of the water treatment plant. Contact the Leopold Application Engineering Group for assistance in determining the clarification process best-suited for your application.
 
SEDIMENTATION
In general, sedimentation clarification is best for water of high turbidity (>100 NTU) or medium turbidity (20 to 100 NTU) and moderate levels of algae.
 
Clari-DAF™ System Dissolved Air Flotation (DAF)
Dissolved Air Flotation (DAF) is best-suited for water having high levels of algae (25 to 56 mg/l) and other low-density particles (<75 NTU) that cannot be removed by sedimentation.
The Clari-DAF system is applicable to virtually any stored body of water, particularly exhibiting any of the following characteristics:
 
Low Turbidity
  • Algae
  • Seasonal Bloom
  • High Total Organic Compounds

Source water storage reservoirs containing nutrient-rich water is a prime source of filter-clogging and taste-and color-causing algae. Algae tends to float and are difficult to remove by sedimentation.
 
Color THMFPs
Soil, decayed wood, and vegetation in surface water sources can result in the presence of color and the formation of THMs (trihalomethanes) and other halogenated organics durning disinfection.
 
Iron
A dramatic reduction of iron can be achieved with the Clari-DAF system.
 
Manganese
The Clari-DAF system can achive a significant removal of manganese with no additional oxidation used in the process.
 

See also:
Leopold® Clari-DAF™ System Dissolved Air Floatation (DAF)
 
 


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