Charged Air Flotation - CAF
Enprotec’s design experience and expertise has allowed it to develop the NEW Charged Air Flotation (CAF). The concept is similar to the use of froth flotation but under the CAF concept there is a much more sensitive control of the froth through the use of Enprotec’s designed fine bubble diffuser. The fine bubble diffuser has a small amount of chemistry added to the bubbles to change the polarity of the bubbles that in turn enhances the particle attachment as the bubbles are introduced to the skim tank and float to the surface.
“Enprotec’s NEW CAF flotation technology has significant benefits”
- Proprietary low psi flotation air bubble generator
- The generator makes fine bubbles that compared to DAF pressurized recycle are:
- More tolerant of process shift
- Less likely to coalesce - repel each other
- Bubbles are formed with a positive or negative surface charge to enhance attachment and coalescence with particles
- No coalesced or wasted air – all air used to float solids
- CAF captures particles too small for DAF. As a result there is greater tolerance of waste stream variation
- CAF floated solids are more stable than DAF and therefore do not have tendency to re-subside as the bubbles stay attached to the solids
- Total capital cost is less than conventional DAF
- CAF footprint is 10 – 60% of DAF
- Simple, automatic operation with immediate startup – “ a significant advantage over DAF”
- 25-75% less power consumption than conventional DAF
- CAF can be easily retrofitted to existing DAF’S to increase flow and/or efficiency
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