Physical Address: cnr Brickfield / Bierman Streets, Vosloorus

Vlakplaats is situated in Vosloorus and falls within the DD6 drainage district. The original plant was built in 1972, but soon after that the need for extension was identified. Three more modules followed in 1974, 1983 and 1991 respectively. The has a designed capacity of 83 megaliters per day. The works presently treats effluent from Boksburg and Vosloorus as well as areas of Tsakane, Duduza and Brakpan. The first three modules are conventional biological filters while the fourth module is an activated sludge reactor designed for biological nutrient removal.

The flow is divided to each of the four modules. Each of the biological filtration processes includes manually operated screens and facilities for grit removal. It also includes primary sedimentation, biological filtration and humus clarification. The effluent from each of the three modules is dosed with ferric chloride for chemical phosphorous removal before it is discharged into a system of maturation ponds.

The activated sludge module consists of mechanical screens and grit removal equipment. It also includes primary sedimentation, in-line flow balancing, a three-stage Bardenpho activated sludge reactor and secondary clarification. The effluent from all four modules flows through the maturation ponds into the Natalspruit and finally into the Klip River. All the sludge, including the thickened activated sludge, is stabilised in mixed, heated digesters from where it is applied on drying beds or on land. Local farmers cultivate instant lawn, utilizing some of the dried sludge.

Capacity : 83.00 Mℓ/d