Programme - IWA

10
L E A D I N G - E D G E
Technical Visits
Delegates joining the technical visit on 6 June will get the opportunity to visit the following three venues.
Ramsès: Wastewater and Storm Water SCADA (Supervisory Control And Data Acquisition) Centre
Implemented in 1992 by the Bordeaux
Metropolitan Area, Ramsès is the central
supervisory control center initially
dedicated to the control and management
of flood risk. In addition, Ramsès
has become a global tool for wastewater
and stormwater monitoring since 2007.
Ramsès performs real-time monitoring
of a large number of data coming from
sensors and actuators, including pumps,
gates, water level sensors, etc.
* Photo credits: David and David
Since 2012, a real-time global optimal predictive control tool has been implemented to control and depollute the Louis Fargue
catchment. This tool is now operational and is unique in Europe. It is able to reduce by 50% the volumes of combined sewer
overflows.
In December 2012 an educational area was opened on the first floor of the control centre building. It presents the story of rainwater
harvesting and the fight against flooding within the Bordeaux Metropolitan Area from the Second World War to today.
Grenouillère: storage and depollution rainwater tank
The Grenouillère underground storage
tank is one of the most important
achievements of the flood prevention and
rainwater harvesting plan. With a diameter
of 60 m and a depth of 24 m, this amazing
underground civil works can store up
to 65,000 m 3 of rainwater.
Put into service in 2002 following huge
construction works lasting more than two
years, the tank remains unknown to the
public despite its vast size.
* Photo credits: David and David
During the visit, the participants will be
able to access inside the tank itself (if
conditions permit).
Louis Fargue: Wastewater Treatment Plant
After four years of expansion work, Louis
Fargue’s new wastewater treatment plant was
inaugurated in October 2012. This construction
is one of the most important works ever
launched by the Bordeaux
Metropolitan Area.
The water treatment line is composed of a
rapid settler with ferric chloride and biofilters
to eliminate the carbon. A third of the
capacity is devoted to treat stormwater flow.
* Photo credits: La Cub
On the sludge treatment line, the sludge is digested, dried in a medium temperature facility, and the biogas formed is used to
produce energy in cogeneration gas turbine.
The brand new wastewater treatment plant is worth a visit.
With a capacity of 2.4 m 3 /s that can be increased to 3.2 m 3 /s during rainwater, the plant is now able to manage 50% of the annual
rainwater volumes that used to flow into the natural environment.
An educational area has also been created. Its aim is to make the public aware of health issues and eco-friendly behaviour linked to
water use.