Upon proposals of IOA corporate members and by kind permission of the operator companies, two visits have been arranged for the Congress delegates.
They  will close the Congress on  24 and 25 October full day.

Set out from Nice to explore the French Riviera.

The tours will depart from and return to the Congress venue. Special registration will be required. The fee will include bus transfer and lunch.
Visitors will have to provide copy of ID card or passport one month prior to visit. Wearing of trousers and closed-in walking shoes is recommended. The organisers reserve the right to cancel or limit attendance at any tour with monies refunded subject to minimum and maximum registration numbers.

  • Technical tour T1 – WWTP Valbonne -Bouillides, Sophia Antipolis

          Thursday 24 October, Full day

In November 2009, the “Syndicat Intercommuncal” for the extension and management of the Sophia Antipolis plant, advised by BG Ingénieurs Conseils, entrusted the plant’s extension to the “SUEZ/EITP” group.

Commissioned on 24 January 2012, its treatment capacity increased from 26,000 population equivalent (PE) to 50,000 pe to conserve the Bouillide, the plant’s treated water receiving water body. This river flows into the Brague and has a saver low water level. Water lost in this flow feeds the Antibes water table which serves as the town’s water supply.

In order to meet regulatory requirements aiming at improving the quality of treated water and thereby protecting the receiving body and water resource, the “Syndicat” and BG Ingénieurs Conseils chose :

  • advanced nitrogen treatment, for a more effective treatment quality than before, with significant and definitive removal of the nitrogen contained in water (eutrophication factor in the river);
  • disinfection using ozone rather than final chlorination in order to remove micropollutants too.

With this process, the Bouillides plant has become the first plant in France to treat micropollutants and to meet the requirements of the European Water Framework Directive (WFD) which imposes the reduction in the release into the natural environment of 41 priority substances. This is therefore fully in line with a sustainable development approach and the protection of water resources.

  • Technical tour T2 – DWP La Verne, La Môle

          Friday 25 October, Full day

Water resources are unequally distributed in the Gulf of Saint-Tropez. To ensure the water supply of their population and be stronger together in the face of drought, the municipalities of the Gulf have regrouped in the Syndicat Intercommunal de Distribution d’Eau de la Corniche des Maures (SIDECM).
The Verne drinking water treatment plant has a treatment capacity of 3,000 cubic meters per hour. It is likely to receive a mixture of raw water of 2 distinct origins: the water of the Verdon routed by the Society of the Canal of Provence or the water of the dam of the Verne.

The treatment process consists of the following steps:

  • Remineralization
  • Coagulation / Flocculation
  • Lamellar settling
  • pH correction
  • Inter-remineralization
  • Inter-ozonation
  • Dual media filtration
  • Post ozonation
  • Injection of sodium bisulfite
  • Lime injection for pH adjustment
  • Chlorination
  • Storage before distribution

The sludge generated by the filter wash water and by the pretreatment undergo on-site treatment to greatly reduce their volume and facilitate their truck transport to the ultimate treatment site.
 
The main stages of sludge treatment are as follows:

  • Sludge flocculation
  • Thickening
  • Centrifugal dehydration
  • Solar drying