Dissolved Air Flotation vs Gravity Clarifier

Whether you are using a Dissolved Air Flotation (DAF) clarifier or a traditional gravity clarifier, wastewater contaminants such as suspended solids, oil and grease must be chemically flocculated in order for either system to remove them. The issue becomes: do I wait for the floc to settle to the bottom of the clarifier by gravity or do I float it to the top by injecting dissolved air in a DAF unit? If your floc is buoyant or slow to settle there is no question that a DAF is the better choice. Of course, you can always add what is called ... » Read More