We have treated many of this type of
plant with great success in reducing the BOD’s, COD’s, suspended
solids, oils grease and fats, sludge and balance the pH. The
best results are the reduction of sludge by 40% to 60%. Prior
to the above DAF there is usually a large holding tank, which is
were we dose the product.
Illustrated above is a typical DAF
plant.
DAF stands for Dissolved Air
Floatation
How it
Works
A coagulant added to the raw water
precipitates dissolved contaminants and encourages particles to form
"floccs". Gentle agitation in the flocculator encourages these to
grow before they pass into the flotation zone. Here, microscopic air
bubbles are injected which rapidly float the floccs to the surface.
The accumulated float is skimmed off. Clarified water passes to the
filter for final polishing and the filter is periodically cleaned by
water or air/water back washing. The 50 micron bubbles used for
flotation are formed by recycling a small stream of filtered water
through an air pressuriseded, packed tower saturator to specially
designed nozzles at the DAF cell inlet. Here, a rapid pressure drop
causes the air to come out of solution and the generation of
millions of small bubbles. Click Here
while online for more information
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Plants will differ from company to
company but the basic principle is the same.
The whole point of this is to give an
idea of were Enzymatic can help as mentioned above.
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