Roodeplaat Temba Water Supply Scheme

Project

The Roodeplaat Dam, situated approximately 20km north-east of the Tshwane CBD, is a valuable local water resource currently owned and operated by the Department of Water and Sanitation. In 2003, the City of Tshwane obtained a water use licence to extract water from this dam for its increasing domestic demand. Unfortunately, the quality of water in the dam was/is generally poor due to the dam’s eutrophic status (being hyper-eutrophic) due to the continuous influx of large volumes of treated sewage effluent from two large wastewater treatment facilities located in the dam’s catchment. The removal of toxins associated with excessive algal growth, complex dissolved manganese and iron, organic constituents responsible for taste and odour-causing compounds, and chlorine-resistant pathogens is a challenge and requires advance water treatment processes.

The City of Tshwane commissioned the new 60 Mℓ/d Roodeplaat Water Treatment Works (WTW) in 2004 and implemented advanced treatment in 2010 with the provision of a LOX-based ozonation plant and Granular Activated Carbon filtration.

 

Challenge

The Roodeplaat Dam, situated approximately 20km north-east of the Tshwane CBD, is a valuable local water resource currently owned and operated by the Department of Water and Sanitation. In 2003, the City of Tshwane obtained a water use licence to extract water from this dam for its increasing domestic demand. Unfortunately, the quality of water in the dam was/is generally poor due to the dam’s eutrophic status (being hyper-eutrophic) due to the continuous influx of large volumes of treated sewage effluent from two large wastewater treatment facilities located in the dam’s catchment. The removal of toxins associated with excessive algal growth, complex dissolved manganese and iron, organic constituents responsible for taste and odour-causing compounds, and chlorine-resistant pathogens is a challenge and requires advance water treatment processes.

The City of Tshwane commissioned the new 60 Mℓ/d Roodeplaat Water Treatment Works (WTW) in 2004 and implemented advanced treatment in 2010 with the provision of a LOX-based ozonation plant and Granular Activated Carbon filtration.

 

Solution

Bigen, as lead member of the Temba Roodeplaat Consulting Consortium, is proud to have provided consulting engineering services for the larger Roodeplaat Bulk Water Supply Scheme ensuring not only technical feasibility, but also cost-effectiveness. The Roodeplaat WTW is currently one of the most advanced water treatment facilities in South Africa and supplies potable water to many consumers residing north of the Magaliesburg.

The original project was implemented as a Public-Private-Partnership (PPP) with funding provided by various local commercial banks. The management entity was a Trust that utilised the income obtained from the CoT (by selling the potable water to its consumers) to service debt and operate the scheme. It was envisaged at the time that ownership of the new infrastructure would be pass to the CoT once the term of the Trust came to an end thereby providing a world-class water supply scheme without the need for on-balance-sheet finance by the CoT.

 

Services

  • Consulting engineering.
  • Programme management.

 

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