Physical Address: Heidelberg Road, Maraisdrift, Nigel

The Herbert Bickley works is situated south of Nigel town and falls within the DD5 drainage district. Built in 1948, and upgraded and extended on several occasions over a period of time, the works is designed to treat 10,5 megalitres per day of industrial effluent and raw sewage from the Nigel, Duduza, Alrapark, Mackenzieville and Jameson Park areas. Both biological filtration and activated sludge are employed as treatment processes.

A central inlet works, incorporating the processes of screening and grit removal serves the works. The older biological filtration module includes primary sedimentation and biological filtration. The effluent is pumped to the activated sludge module for further treatment. The BNR activated sludge module includes a conventional 3 stage reactor basin and final clarification. The effluent is finally chlorinated before discharging it into the Blesbokspruit. A portion of the final effluent is utilised by the Nigel Correctional Services facility for irrigation purposes.

Capacity : 10.50 Mℓ/d