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HUBER Dissolved Air Flotation Plant HDF S Flat Flotation System with Reduced Separation Zone but Larger Water Surface

Flotation plant HDF S for high solids loads
  • Flat construction with a large water surface of up to 160 m³/h
  • Simple, reliable saturation system using a multiphase pump
  • Machines can be mounted in standardcontainers as mobile units
  • Suitable for high solids loads and foractivated sludge separation as analternative to conventional secondaryclarification
  • Up to 30% operating costs saving when combined with a DIGIT-DOSE Chemicals Dosing system
Principle of Flotation:

During dissolved air flotation, very fine gas bubbles of 20 ‒ 40 μm are released, which together with the particles present in the wastewater, form an agglomerate.

This agglomerate has a lower density than water and rises to the water surface. Nonflotatable particles are separated via conical selection chambers. The particle-free clear water passes through an immersion wall and is then available for further use.

If a tube flocculator is installed upstream of the flotation plant, so-called precipitants and flocculants can be added, which improve the clarification performance accordingly.

HUBER Dissolved Air Flotation Plant HDF S: Flat flotation system for high solids loads
HUBER Dissolved Air Flotation Plant HDF S: Flat flotation system for high solids loads
Installation in container construction up to 80 m³/h as a fast and mobile solution
Installation in container construction up to 80 m³/h as a fast and mobile solution
HUBER Dissolved Air Flotation HDF S - flat construction with large water surface area
HUBER Dissolved Air Flotation HDF S2 with various peripherals
Ready-to-operate HUBER Dissolved Air Flotation HDF S4 in container version, also available as rental unit
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Sketch: Different sizes of the HUBER Dissolved Air Flotation Plant HDF S
Sketch: Different sizes of the HUBER Dissolved Air Flotation Plant HDF S

Design and Function

Sketch: Different sizes of the HUBER Dissolved Air Flotation Plant HDF S
Sketch: Different sizes of the HUBER Dissolved Air Flotation Plant HDF S
HUBER Dissolved Air Flotation Plant HDF S for the treatment of heavily polluted wastewater

In addition to the compact HUBER Dissolved Air Flotation Plant HDF with a separation zone of more than one metre, there is a flat flotation system with a reduced separation zone but larger water surface, the HUBER Dissolved Air Flotation Plant HDF S. The letter ‘S’ stands for sludge, as the plant is able to separate very voluminous and highly contaminated wastewater and sludge in a defined way. Maximum performance is ensured by a very large water surface for reliable flotation and a flow-optimised design of the tank.

The contact zone between wastewater and saturated water is followed by a defined flow over the entire width of the tank. The sludge particles can thus rise to the water surface as required. There, they are additionally thickened with special scraper joists and then removed with a chain scraper in the direction opposite to the direction of the flow. Remaining sediment and  heavy materials are automatically discharged via several funnelshaped sediment outlets. The efficiency of the saturation system is greatly increased in these plants in  order to meet the requirements caused by higher wastewater loads.

The main field of application of the HUBER Dissolved Air Flotation Plant HDF S is heavily polluted industrial wastewater and the separation of activated sludge as relief or alternatively as replacement for a secondary clarifier.

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