VEOLINK Advanced ControlPrediflocTM

Optimize your physical-chemical treatmentReduce your chemical consumptionLower your carbon footprint

The Predifloc™ OfferPredifloc™ is an advanced, predictive control tool which associates algorithms capable of anticipating the changes in the treatment rate of physical-chemical processes.Predifloc™ uses data from turbidity sensors and probes analyzing specific elements (such as phosphorus), which are placed upstream and downstream physico-chemical treatment to anticipate the dynamic effect of the disturbances. Predifloc™ continuously calculates and adjusts the flow rate of chemical dosing pumps while complying with the specified water quality discharge guidelines.

Compared with traditional control systems of PID type (proportional-integral-derivative), Predifloc™ delivers more accurate results. It enables the optimization of physical-chemical treatment performance while reducing chemical dosing by approx. 15 to 20% and up 40% in some cases. Such savings in chemical consumption make it possible to achieve a very short return on investment (1 to 2 years on average), which is all the shorter if the consumption is greater.

Predifloc™ makes it possible to control and minimize the consumption of chemical products (coagulants and flocculants) in physical-chemical treatment systems. Depending on the configuration, Predifloc™ is ideally

adapted for water treatment that involves the removal of suspended solids and phosphorous.

Keeping the consumption of chemical products in water treatment to a minimum has become a major environmental issue. With that in mind, R&D teams of Veolia

Water have developed Predifloc™, a tool for advanced control of chemicals reagents.

ApplicationsIn municipal applications Predifloc™ is recommended for:

Primary or tertiary physical-chemical treatment of wastewater or stormwater

Drinking water and process water clarification

Predifloc™ can be combined with the following water treatment technologies developed by Veolia Water Solutions & Technologies:

Actiflo® (coagulation, ballasted flocculation and high-rate settling)

Multiflo™ (coagulation, flocculation and rapid lamellar settling)

Spidflow™ (coagulation and rapid flotation)

PREDIFLOCTM

The benefits for your facility

References

• Facilitate plant operation• Optimize chemical consumption • Maximize physical-chemical treatment

performance (Suspended Solids and Phosphorus)• Minimize sludge production• Reduce plant carbon footprint• Reduce plant operating costs

• Boulogne sur Mer, France (2009): MultifloTM primary treatment, 200 000 PE• Toulouse Ginestous, France (2010): MultifloTM primary treatment, 950 000 PE• Embrun, France (2010): MultifloTM primary treatment, 30 000 PE• La Garde Toulon-Est, France (2010): Primary treatment, 106 000 PE• Rouen Emeraude, France (2011): Actiflo® tertiary and stormwater treatment,

500 000 PE• Barcelonnette, France (2011): MultifloTM primary treatment, 38 000 PE• Saint Maxime, France (2011): Actiflo® primary treatment, 60 000 PE• La Londe Les Maures, France (2011): MultifloTM primary treatment, 40 000 PE

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ImplementationTo facilitate the implementation of the Predifloc™ tool, Veolia Water Solutions & Technologies has developed a standard automatic operational block which can be easily integrated into an existing program at a site already equipped with automatic control systems.

For all other cases, a standard cabinet based solution has been chosen. This cabinet interfaces in Ethernet or with any other PLC (Programmable Logic Controller).

Predifloc™ Cabinet with Automatic Control System

Example of a monitor screen