Upgrading of the Kathu Waste Water Treatment Works
Upgrading of the Kathu Waste Water Treatment Works
The Gamagara Municipality required modifications to the existing WWTW plant to increase capacity. The project involved the construction of reinforced concrete water retaining structures, building works, interconnecting pipework and general site works.
Client: Gamagara Municipality, Kathu, Northern Cape
Contract value: R34.5 Million
Duration: 12 months
Completed: Oct 2013
Engineer: Worley Parsons, Kimberley
Overview of the Project
The Gamagara Municipality required modifications to the existing WWTW plant to increase capacity. The project involved the construction of reinforced concrete water retaining structures, building works, interconnecting pipework and general site works.
Scope of Work
Scope of Work
The work included:
⦁ Demolition of several structures and modification of existing aspects of the plant
⦁ Modifications to the existing inlet works &relocation of wash water tank
Construction of the following:
⦁ 58m x 30m biological reactor
⦁ Two 24.6m diameter concrete secondary settling tanks
⦁ RAS and WAS pump station, ablution facilities, office and laboratory
⦁ 57.6m x 22m Sludge drying beds
⦁ Supernatant pump station and tanker discharge area
⦁ Interconnecting pipework
⦁ Other works:
⦁ Site works including paved roads and renovation of existing chlorination building
⦁ M&E works were undertaken concurrently with the civils works under a separate contract
Challenges & Successes
The CPGL component required 50% local labour which was difficult to meet however, the dedication of the CLO ensured the requirements were met and knowledge transfer a focal point.
Dewatering was required for the excavation of the supernatant pump station as the excavation was 3.7m below NGL and seepage was a problem. A well point was installed and the ground water controlled, enabling construction to proceed uninhibitied.
