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Send  Share  RSS  Twitter  21 Oct 2010

TECHNOLOGY: Pressure Management Saves Water

 



Recent Western Cape Business News

Pressure management is saving the City of Cape Town millions of Rand and millions of Kilolitres of water each year. Pressure management involves reducing the pressure of the water supplied to consumers during off peak periods to reduce water leakage and levels of wastage in the water distribution system.

The City’s most recent pressure management project in Brown’s Farm, Philippi, was completed in June this year. Brown’s Farm has an estimated population of 75 500. The water supply system in the area was experiencing high levels of leakage due to high pressure, poor internal plumbing, frequent pipe bursts and an aging water infrastructure.

Following a feasibility study, a pressure management system was installed, which resulted in an immediate drop in the average consumption, minimum night flow and peak flow rates, which translates into significant water savings. The total estimated savings from this system is R8.25 million/yr based on a water delivery cost of R6.20/Kl. There has also been a significant reduction in the frequency of mains and connection bursts, resultant water loss and network downtime, which brings financial savings with reduced overtime and material costs to repair pipe bursts.

Following upon the success of its flagship pressure management installation in Khayelitsha, the City of Cape Town continues to install pressure management installations across the city wherever it is feasible to do so.

When first initiated in 2001, the Khayelitsha pressure management system was the largest in the world, now it is the second largest, closely followed by Mitchells Plain as the third largest. The combined annual water savings of these two installations is 11.40 million Kilolitres and R77.35 million in monetary terms.

 


 
 
 
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