Upon proposals of IOA and IUVA corporate members and by kind permission of the operator companies (Degrémont Technologies-Ozonia, Eau de Paris, Lyonnaise des Eaux, SEDIF, Trojan Technologies, Veolia) three visits have been arranged for the Congress delegates.
- Choisy le Roi and Méry sur Oise Drinking Water Plants
- Côte de Nacre WasteWater Treatment Plant and D Day Museum of Arromanches
- Orly and Joinville Drinking Water Plants
Each one lasts the day with picturesque stretch of the area with possible stops. All tours depart from and return to the Congress center CAP15. Special registration is required. The fee includes bus transfer and lunch.
Visitors will have to provide copy of ID card or passport one month prior to visits. 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.
Tour T1 - Choisy le Roi and Méry sur Oise Drinking Water Plants
Thursday 26 May - Full day tour
SEDIF (Syndicat des Eaux d?Ile de France) founded in 1923, is a public establishment covering 144 municipalities spread over seven departments in the Paris area, and is responsible for the production and distribution of drinking water for 4 million customers. The raw water comes mainly from three surface water resources: The rivers Seine, Marne and Oise which are respectively treated in the Choisy-le-Roi WTP, Neuilly sur Marne WTP and Méry sur Oise WTP.
The Choisy-le-Roi plant on the Seine river, serves approximately 1.65 million inhabitants It is amongst the major water treatment plants in Europe, designed for a 600 000 m3/d nominal capacity. The water treatment line was initially including coagulation, sand filtration, ozonation, GAC filtration onto granular activated carbon and final chlorination. Considering the effectiveness of the current process for Cryptosporidium removal (< 4 log) and the risk which would result from a filtration failure, SEDIF has made the decision to secure the treatment process in Choisy le Roi plants by inserting recently a UV disinfection step between the GAC adsorption and final chlorination.
The Méry-sur-Oise plant, serves 39 districts in the northern suburbs of Paris, totaling 800,000 inhabitants with 370 000 m3/d nominal capacity. The plant has two independent treatment trains. The biological train includes settling, sand filtration, ozonation, activated carbon adsorption and chlorination. The membrane train applies lamellar sedimentation, dual-layer filtration, microfiltration and nanofiltration. It produces 80 % of the water distributed.The Méry-sur-Oise plant, serves 39 districts in the northern suburbs of Paris, totaling 800,000 inhabitants with 370 000 m3/d nominal capacity. The plant has two independent treatment trains. The biological train includes settling, sand filtration, ozonation, activated carbon adsorption and chlorination. The membrane train applies lamellar sedimentation, dual-layer filtration, microfiltration and nanofiltration. It produces 80 % of the water distributed.
Tour T2 - Côte de Nacre WasteWater Treatment Plant and D Day Museum of Arromanches
Thursday 26 May - Full day tour
The Joint Association of Côte de Nacre of the Normandie coast was created in 1992 in order to manage and control the wastewater treatment for seven towns: Courseulles-sur-Mer, Bernières-sur-Mer, Saint-Aubin-sur-Mer, Langrune-sur-Mer, Luc-sur-Mer, Douvres-la-Délivrande et Cresserons. The wastewater treatment plant is located at Bernières sur Mer, twenty kilometers of Caen,, regional capital, and 270 kilometers from Paris.
The sewage treatment plant has a capacity of 97 000 population equivalent (based on seasonality). The raw sewage collected undergoes a full pre-treatment including mechanical screening, degreasing and desanding, biological treatment using activated sludge within two stages for carbon and nitrogen removal. At the outlet of the clarifier, the purified water is further treated using tertiary sand filtration and final ozonation for disinfection purpose. After the treatment, the effluent is discharged according to the tides. The rejection is made at 15 meters depth and at 2.5 km of coastline.
Visiting Normandy is the opportunity for you to discover its lanscape, the medieval architecture of the Caen area and the landing beaches. Bernières-sur-Mer offers to the walkers two and a half kilometres of bank lined with a cordon dunaire on the West, of a dike walk along the town, and along a cliff in the East. The sea, in low tide, lets discover the sandy estran, rocks and islands which make the happiness of fishers.
The church and the big properties in their case of greenery encircled by walls in stones make the charm of Bernières and are the witnesses of rich past. Bernières was formerly an active port in the mouth of Seulles. The church Notre-Dame with imposing dimensions and the high stone arrow drawn up between ground, sea and sky - is a beautiful example of the medieval architecture of the Plain of Caen and Bessin. Bernières is a high place of the unloading of the allied armed forces. Numerous Anglo-Saxon and Canadian soldiers walked on the beach of Juno Beach to free Bernières and Europe, some left it the life. The still visible vestiges of the Atlantic Wall became a place of memory.
The tour includes stop and visit of the D Day Museum of Arromanches that is the battle of Normandy main highlight. It is the first museum to be built in commemoration of June 6th 1944 and the Normandy Campaign. It overlooks the very spot where one of the Mulberry Harbours was constructed and where its remains can still be seen today, just a few hundred metres from the shore.
Tour T3 - Orly and Joinville Drinking Water Plants
Friday 27 May - Full day tour
Eau de Paris is the unique public institution of the City of Paris in charge of the management of the water service in Paris, from collection, production to distribution of 550 000 m3/d of drinking water to users and subscribers. The city of Paris has four plants fed with groundwater at Longueville (77), Sorques (77), Saint-Cloud (92) and Hay-les-Roses and three plants treating the waters of the Seine and Marne rivers at Ivry, Orly and Joinville. Half of the drinking water supplied comes from the plants of Orly and Joinville, which withdraw water, respectively, in the Seine and the Marne.
Each of Orly and Joinville plants has a capacity of 300 000 m3/d. The treatment lines are shown below. To comply with new regulations on pathogens and bromate restrictions, the ozone drinking water treatment plants in Joinville and Orly are now equipped with UV reactors.