Windhoek Goreangab, Water Reclamation Plant, Namibia

Client: City of Windhoek.

Capacity: 21,000 m3/d.

• Water reclamation plant for the production of potable water for Windhoek, Namibia. The capacity of the reclamation plant totals 21,000 m3/d. The raw water used consists of treated municipal wastewater.
• The municipal wastewater from the region is conditioned in the Gammans treatment plant (nutrient removal with the UCT process) and polished in maturation ponds before being combined with the reservoir water for cleaning in an advanced multi-barrier system (NGWRP). This employs several barriers for all crucial contaminants and thus guarantees outstanding drinking water quality. Since start-up, all the relevant standards have been fulfilled without difficulty.
• Process steps:
  • Oxidation and pre-ozonation
  • Powdered activated carbon dosing
  • Coagulation and flocculation
  • Dissolved air flotation (DAF)
  • Dual media filtration
  • Main ozonation
  • Biological activated carbon filtration (BAC)
  • Granular activated carbon filtration (GAC)
  • Ultrafiltration
  • Disinfection and stabilisation.
• Operational management:
  • WABAG not only designed this unique plant, but is also a member of the operating consortium, WINGOC (30%), and has been managing the NGWRP since 2002. In this way, WABAG has contributed to a sustainable improvement in the population’s quality of life.