Dissolved Air Flotation (DAF)

High efficiency equipment for physico-chemical treatments

 

Dissolved air flotation
Anaconda®

It separates solid particles from liquids by means of advanced FADAR® (high performance dissolved air flotation) flotation technology.

Thanks to the advanced FADAR® technology, our equipment produces a stream of micro air bubbles that adhere to the floccules, raising them to the surface where a system of scrapers drags the sludge bed generated to the hopper that collects the sludge, reducing the total suspended solids by up to 90%, reducing the COD and obtaining a sludge dryness of around 6%.

WHAT IS F.A.D.A.R. TECHNOLOGY

 

Dissolved air flotations floats separate solids using FADAR® technology, developed by Toro Equipment, which enhances flotation by injecting micro air bubbles into the floc. This causes the floc density to reduce, creating what we call sponge flocs, which increases the separation rate. Stokes’ theorem.

REDUCTION OF SST
UP TO ONE

 

90%

 

DISSOLVED AIR FLOTATION MODELS

The dissolved air flotation float range consists of four different models

 

flotador por aire disuelto toro equipment
Dissolved Air Flotation Rectangular cell.
Anaconda®

From 2 m3/h up to 600 m3/h with recirculation

Linear scraping system.

Flotador Wtank
Dissolved Air Float Circular cell.
W-Tank®

From 1,301 m3/h to 9,877 m3/h with recirculation.

Perimeter scraping system.

Anaconda® Float Types

dissolved air flotator
Part of the open area

Separates 40-60% of solids, the bulk solids.

Part of the lamellar area
  • Produces polished effect, high output water quality
  • Protected from outlet overloads
  • Solid, non-collapsing, high-strength infused GRP lamella construction. Easy to clean

W-Tank® Float Types

flotador por aire disuelto toro

High water flows

Part of the open area
  • Water distribution
Part of the lamellar area
  • Flotation of solids
  • Solid, non-collapsing, high-strength infused GRP lamella construction. Easy to clean

 

Designed for:

 

  • Internal osmosis pretreatment
  • Water supply from ponds and reservoirs

 

*Toro Equipment offers the option of purchasing the equipment pre-assembled, ideal for E.D.A.R that does not require civil works or for specific needs.

OPERATION

 

Certain chemical compounds are usually added to facilitate the flotation process. For the most part, these chemical reagents work in a way that creates a surface or structure that allows air bubbles to be easily absorbed or trapped. Inorganic chemical reagents, such as iron or aluminium salts and activated silica, are used to aggregate the solid particles so as to create a structure that facilitates the absorption of air bubbles.
Various organic polymers can also be used to modify the nature of the air-liquid or solid-liquid interfaces, or both. In general, these compounds act by positioning themselves at the interface to produce the desired changes.

The degree of clarification obtained when reagents are added to the wastewater depends on the amount of reagents used, and the care with which the processes are controlled and operated. By chemical precipitation it is possible to remove 80 to 90 per cent of suspended solids, 70 to 80 per cent of BOD5 and 80 to 90 per cent of bacteria. Comparable removal values for properly designed and operated primary sedimentation tanks without addition of reagents are between 50 and 70 per cent for suspended solids, 25 to 40 per cent for BOD5 and 25 to 75 per cent for bacteria.

MATERIALS

 

Our Anaconda® range of dissolved air floats is mainly made of glass fibre reinforced polyester (GRP), which gives it the ability to:

  • Corrosion resistance.
  • Durability and resistance to many variables.
  • Ideal for aggressive or hostile saline environments.
  • Easy to transport due to its light weight.
  • Minimal environmental impact during the manufacturing process.

ADVANTAGES

 

  • Good results with large volumes of solids resistant to decantation.
  • High floc ascension speed.
  • 100% resistant to the corrosive effluents generated.
  • Safety system.
  • Different installation options depending on the available space.
  • Sludge dryness obtained around 6%.

WE ADAPT TO YOUR NEEDS

 

In our factory in Villavaquerín we manufacture different models of floats which, together with the different sizes of flocculators and pressurisation skid, allow us to adapt to the needs of the client depending on the flow and load of solids to be treated.

PRESSURISATION SKID

 

flotador por aire disuelto toro

Consisting of a boiler, pumps, valves, supports and base in GRP, and structure in AISI 316.

By separating the skid from the DAF tank, we can better adapt to the needs of your project depending on the flow rate and the TSS to be treated, thus optimising the flotation process.

FLOCCULATION TUBE

 

flotador por aire disuelto toro

Allows in-line dosing of chemicals into the water. It consists of PVC, polypropylene, polyethylene or stainless steel pipes, depending on the application.

Toro Equipment ofrece tres tamaños de floculadores diseñados para los diferentes modelos de flotadores: FLH modelo estándar,   FLH modelo superior   y   FLH modelo FRL.

Incluyen: Toma de inyección de reactivos, grifos de toma de muestra que permiten controlar la cantidad de químico inyectado, sustentación en PRFV y acero AISI 316.

References

SECTORS OF APPLICATION

 

  • Vegetable oils
  • Biofuels
  • Slaughterhouses
  • Canned food and fish
  • Pharmaceuticals
  • Wood industry
  • Mining
  • Paper industry
  • Pre-cooked food
  • Textile industry
  • Surface treatment

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