Engineers take on Mother Nature at Hartebeestfontein

Abstract

WASTEWATER TREATMENT L ocated to the east of Kempton Park, on the East Rand, the Hartebeestfontein works was originally established in 1977 comprising three 10 Mℓ/day treatment modules. The plant treats wastewater from the industries in Spartan and Isando as well as households in the Kempton Park area. Wastewater is processed using a two-stage activated sludge process. Each stage is a complete processing unit comprising aeration, clarification and sludge return. The primary stage is aimed mainly at Chemical Oxygen Demand (COD) removal, while the secondary stage is for nitrification. In 1986, a side-stream Phostrip (biological phosphate removal) plant was retrofitted. This was followed by the addition of a third inlet works module in 1992 and a single 15 Mℓ/day treatment works, resulting in the works’ total present capacity of 45 Mℓ/day. In 1995, a tertiary treatment system was designed and implemented to handle chemical dosing to allow for more effective phosphate removal.

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