Zandvliet upgrade well ahead of schedule
26 January 2020
Just one year after construction commenced on the mammoth upgrade of the Zandvliet Wastewater Treatment Works (WwTW) the project is progressing ahead of schedule with just over 35% of the budgeted cost spent to date.
Four out of the project’s eight contracts have been successfully completed and commissioned. The balance are in progress and making good headway.
Upon completion, the plant capacity will increase from 72 million litres to 90 million litres of wastewater per day, which will be able to cater for an additional population of 150 000 people.
The upgrade extends the footprint of the facility by 18 hectares. The extent of the work completed to date encompasses the following:
| Description | Quantity |
| Volume of earth excavated | 245 048 m³ |
| Length of pipes laid | 4 631 m (over 4 km) |
| Area of adjacent ERF acquired | 18 hectares |
| Area of ground cleared | 157 978 m² |
| Volume of concrete poured | 10 333 m³ |
| Mass of steel fixed | 1,09 million kg |
| Area of new roads laid | 3 187 m² |
| Kerbs installed | 2 465 m |
| Fencing installed | 1 826 m |
‘Despite the massive scale of the task at hand, as shown above, the team have demonstrated remarkable attention to detail, especially in terms of environmental compliance. A total of 6 343 plants of ecological value were relocated prior to construction,’ said Alderman Xanthea Limberg.
The upgrade encompasses the installation of state-of-the-art technology and the treatment processes applied at the facility are considered best practice for municipal wastewater treatment.
Once the upgrade is completed, about 60 tons of dewatered sludge will be removed from the facility daily.
The City is committed to ensuring that it continues to evolve its processes to manage waste and to ensure that it does everything in its power to put enhanced processes for sustainable urban management in place.
The commissioning of the new plant is anticipated to take place by June 2024.
Importantly, and to improve the operation of the Zandvliet Wastewater treatment plant, certain sections such as the sludge handling facility will be operational by November this year,’ added Alderman Limberg.
Soon thereafter, further expansion will be implemented to cater for continuing urban growth in the area. The existing plant will continue to operate and treat wastewater throughout this period.
CAPTION: The photos show the progress of the project within a period of six months
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Published by:
City of Cape Town, Media Office
