01-02-2018 - Stellenbosch, South Africa

Veolia upgrades Stellenbosch wastewater treatment plant

Veolia Water Technologies South Africa has been contracted by the Stellenbosch Municipality to upgrade the mechanical and electrical works in the region’s only wastewater treatment plant. The upgrade, including all initial civil works, will increase the plant’s operating capacity to 35 megalitres per day, ensuring the increasing sewage is adequately treated and surrounding waters are not polluted.

Veolia upgrades mechanical and electrical works at the Stellenbosch wastewater treatment plant, to increase its operating capacity to 35 MLD.

At an operating capacity of 20 MLD, the 93-year old wastewater treatment plant is currently operating at well below the region’s demand. As a result, poor quality effluent is being discharged into the nearby Veldwachters River in addition to creating odour problems in the tourist-popular Western Cape town.

Working in conjunction with the designs from consulting engineers, Aurecon, Veolia has commenced installing a range of technologies to increase the plant’s operating capacity to 35 MLD. The upgraded plant will feature a full biological and nutrient-removal facility using a membrane biological reactor (MBR) and will also cater for future growth in the area. Veolia will utilise innovative, low footprint membrane and ultra-violet disinfection technology to treat the effluent to comply with discharge specifications into the local river. This final UV clarification step will remove all remaining harmful contaminants from the wastewater.

“These technologies ensure that treated wastewater will be of a SANS-approved potable quality which is vital as the plant outflow will discharge into the Veldwachters River, which is used to irrigate local crops,” says Peter Avenant, Process Engineer, Veolia Water Technologies South Africa. The plant is also located in a highly dense and popular area and Veolia has also been commissioned to install modular type bio-trickling filters and bioreactors in the inlet system to address the town’s odour concerns.

Phase 1 of this project has been completed and Veolia is currently commissioning the plant. Phase 2, the refurbishment of the existing works, commenced in October 2017.