05-05-2010 - Knysna, South Africa

VWS ENVIG TO BUILD WATER AUGMENTATION PLANT IN KNYSNA

The reverse osmosis water augmentation plant constructed by VWS Envig for the Knysna Municipality will produce an additional two mega litres per day of drinking water for the town.

VWS Envig has been awarded a turnkey contract to supply the Knysna Municipality with a reverse osmosis water augmentation plant. The plant will produce an additional two mega litres per day of drinking water for the town. The municipality appointed SSI Engineers and Environmental Consultants as their consultant and Keith Turner of the SSI Knysna Office is the appointed Engineer.

According to Abrie Wessels, VWS Envig general manager, Cape region, the project is being fast-tracked due to the serious water shortage in the Southern Cape and the need for additional potable water. "We are currently in the construction phase of this emergency project and our aim is to have the plant ready to commence with commissioning by the end of April 2010."

The plant has been designed by the VWS Envig team in Paarl, with the heart of the plant consisting of three reverse osmosis skids. Standard SIRION™ Sea water D-710T skids were manufactured in our Spanish sister company's workshop, part of Veolia Water Solutions & Technology, due to fast delivery times. The remainder of the system has been manufactured and procured from the Cape region.

The Standard Desalator D-710 skids at Knysna's reverse osmosis water augmentation plant are fitted with energy recovery turbines to save on electricity consumption and reduce the plant's carbon footprint.

"The skids are fitted with energy recovery turbines to utilise the energy in the brine and thus save on electricity consumption and reduce the carbon footprint of the plant," says Wessels.

Raw water will be sourced from beach wells at Loerie Park Sports Ground near the Knysna lagoon and the plant will be constructed at the Knysna Wastewater Treatment Works. This allows the new plant to take advantage of the existing infrastructure and blend the outfall from the conventional sewage treatment plant with the reverse osmosis brine. The blended water will have a salinity lower than that of seawater and thus the co-operation of the two plants is a major benefit.

The drinking water from the plant will be pumped back into the existing Knysna potable water reticulation system with energy-efficient pumps.

Once the plant is in operation, VWS Envig will operate and maintain the plant for a period of three years for Knysna Municipality.

For more information, please contact us:

Abrie Wessels
Regional General Manager: Cape
VWS Envig
Tel: +27 (0)21 871 1877
Fax: +27 (0)21 872 2664
Email

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