References

Vivé, French Carribean

Work started in July 2003 and took 27 months, for a total cost of approximately 19 million Euros. The water to be treated comes from the River Capot. It is drawn off using a river water intake, and is then routed to the treatment unit via a supply pipe with a diameter of 800 mm and which is approximately 2 km long.

 

This unit, which is considered to be one of the key parts of Martinique’s drinking water supply system, and which has a capacity of 35,000 to 42,000 m3/day, will guarantee that the inhabitants of Martinique have good quality water. The advanced technology of membrane filtration using the Cristal® process enables a water quality level to be achieved that is higher than what is required by the standards in force.

 

 

  

 

 

WATER TREATMENT

• River water intake
• Grit removal unit
• Remineralization at the head (injection of CO2 and lime)
• Adding powdered activated carbon
• Quick mixing, injection of aluminium sulphate
• Lamellar settling in a Pulsatube®
• Feed pumping (two 940 m3/h pumps + 1 back-up pump)
• 130-micron prefiltration
• Cristal® process ultrafiltration: Five Ultrazur® 450-20 blocks
• Final neutralization of the pH by injection of lime water
• Disinfection in sodium hypochlorite
• Pumping of the treated water to the distribution network and the Assier reservoir (3 x 875 m3/h pumps)

SLUDGE TREATMENT

• Thickening of the sludge
• Dewatering via centrifugal separation
• Lime treatment of the centrifuged sludge (with quick lime)
• Transfer of the sludge to storage skips