DAF
1.Clarification
Flotation is used for clarification of water or wastewater as well as thickening of the sludge.
The influent wastewater is mixed with part of the clarified effluent (recycle flow) which is pressurised to 400-500 kPa in the presence of sufficient air to become saturated. When the pressurised air-liquid recycle is released to atmospheric pressure in the flotation unit, minute air bubbles are released from the solution. The solids of influent are floated by these minute air bubbles attached to the solids. The air-solid mixture (float) rise to the surface, where it is skimmed off. The clarifier effluent is removed at the bottom through a baffle and flows to the top weir for discharge.
2.Thickening of Sludge
DAF is commonly used for thickening WAS in sewage treatment plant. No polymer is required normally and solids can be thickened to 3-5%. DAF is a 24 hour continuous process and can run 24 hours a day with little attention. It will keep the sludge in aerobic condition which is important to prevent phosphorous being released in modern BNR plants.
3.Industrial Wastewater
DAF have a wide range of applications for industrial wastewater treatment. It is used to remove suspended solids and oil and grease from industrial wastewater, mainly in food processing.
Below are some of the specific product brochures that Aquatec-Maxcon uses
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