Idraflot - Model DAF - Compact Air Flotation Units
IDRAFLOT are very compact flotation units which boast the lowest chemicals consumption within the category. These units reach a very high thickening and clarification grade with the highest removal efficiency on suspended solids, oils and grease, and not soluble COD.
iDRAFLOT are intended to assure a perfect mixing of the waste with saturated water and an uniform distribution of the water flow along the entire surface of the unit made possible by their innovative modular design. Tanks are, in fact, designed by modules. The opportunity to replicate the same module along the whole structure of the unit gives benefits in terms of process stability allowing the blowing of the air not just from one point, as in the traditional systems, but along the whole surface of the unit and from both sides of it. This peculiarity makes IDRAFLOT a multi-flotation system with more stable and effective performances.
Product Overview
Each module acts as a double flotation unit. In addition, IDRAFLOT flotation units have mixing volumes intended to optimize the process and the unit global handling. Global volume reduction is intended to: reduce chemical additive dosingreduce the saturated water flow rate (up to 50% less compared to the conventional models) avoid hydraulic short circuitsreduce the unit management costs Furthermore, a compact and modular structure makes transport and any future re-placing easier.
The DAF Technology
The flotation is a separation technology, generally used for the treatment of process water and wastewater, to separate solid or liquid particles from the acqueous fraction.
To carry out this separation, air micro-bubbles are released at high pressure to the water to be treated and adhere to the suspended solids, facilitating their flotation to the top.
These bubbles are smaller than in other kind of flotation: smaller bubbles adhere to solids better. This is the most important type of flotation for wastewater treatment.
The separation occurs through the agglomerated particles migration to the water free surface and it is conditioned by factors such as:
- particles density
- wettability
- surface tension
- temperature
- pH
Destabilization of colloidal particles.
The double layer theory (Stern theory)
- Colloids in the water are usually negatively charged.
- A concentration gradient forms between the colloid’s surface and the solution (double layer). An electromotive force develops between the particles and the water: this is called «potential».
- The potential difference between the shear plane and the water is called «Z potential» (ZP).
High ZP / no particles agglomeration: uniform dispersion, stable and free to flow.
Low ZP / van der Waals forces prevail on repulsion and agglomeration (unstable suspension).
Coagulation is the annulment of the Z potential.
An Innovative and Effective Water Mixing Device
IDRAFLOT is not only a compact unit, but also offers many additional advantages.
IDRAFLOT units allow for enhanced thickening and clarification performance. This creates an increased removal of insoluble COD, suspended solids, and FOG (fats, oils, and grease).
IDRAFLOT flotation units are protected by three patents. They are intended to assure a perfect mixing of the waste with saturated water and a uniform distribution of the water flow along the entire surface of the unit.
IDRAFLOT flotation units have mixing volumes intended to optimize the process and the unit’s total capacity.
IDRAFLOT Optimization Benefits Include:
- reduce chemical additive dosing
- reduce the saturated water flow rate (up to 50% less compared to the conventional models)
- avoid hydraulic short circuits
- reduce the unit’s operational costs
A Unique Modular Design
Advanced engineering has made it possible to create a powerful and flexible DAF solution.
The unit’s tank is designed to with a series of modules. This allows for an even distribution of air throughout the unit, when compared to other DAFs that utilize a single tank and distribute the air from a single location. The opportunity to replicate the same module along the whole structure of the unit gives benefits also in terms of consistency and reliability of the treatment process.
A tank designed by modules allowes the distribution of the air not just from one point, as in the traditional systems, but along the whole surface of the unit and from both sides, at different heights based on the specific treatment needs. Each module acts as a double flotation unit.
Application/Industries Served
Applications
Effective for biological treatment and thickening of activated sludge from biological plants.
- Wastewater Treatment Process
- Pre-treatment
- Wastewater Treatment Process
- Tertiary Treatment (P removal)
- Wastewater Treatment Process Sludge
- Thickening
- MBBR Post Treatment Sludge Separation
- Rain water, floor cleaning
- Pure Water and Wastewater
- Filter Back Wash treatment
Industries
IDRAFLOT is an excellent solution where water clarification and solid separation are required.
- Food & Beverage
- Healthcare (Pharma & Cosmetics)
- Municipal
- Pulp & Paper
- Mining
- Waste disposal centers
Water Impact Index
IDRAFLOT is a water treatment technological solution designed to face the new sustainability challenges in terms of water management.
Materials
- The corrosion resistance is one of the IDRAFLOT basic characteristics.
- That’s why all IDRAFLOT flotation units use AISI 304, 316 and Superduplex (in case of seawater / high salinity applications).
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