Construction of Adiyan Waterworks Phase II
Start of works:
The project, located in Adiyan near Lagos, involves the construction of an intake station situated on the right bank of the Ogun River, complete with a vertical pumping system which conveys the untreated water in a spheroidal cast iron pipe 1,600 mm in diameter and approximately 8 km long.
The pipe carries the water to the purification plant comprising two parallel treatment lines and the sludge line. The purification treatment includes the flocculation, flotation, aeration, filtration with sand and activated carbon and disinfection with UV rays.
When the water has been purified and rendered fit for drinking it is sent by a pumping station in two 80 m diameter circular tanks, 12 m tall, and introduced into the aqueduct.
|MAIN TECHNICAL DATA:|
|Purification capacity: 340,000 m3/h + 5% pressure leaks|
|Excavations: 275,000 m3|
|Trench excavations: 250,000 m3|
|Backfill: 245,000 m3|
|Concrete: 100,000 m3|
|Sand for filters: 5,376 tons|
|Carbon for filters: 1,630 tons|