Wastewater treatment is a process used to remove contaminants and convert it into an effluent, which can be returned to the water cycle with minimum impact on the environment. In municipalities, this process takes place in water treatment plants, where pollutants are removed and broken down. This recycling is vital to the sustainability of scarce resources.
The WWTW in Kwanobuhle, a large township in the Eastern Cape, needed desperate rehabilitation. In January 2019, Ibhayi Contracting took on this responsibility.
Sika products were used to streamline and simplify the complex rehabilitation process. The concrete spall repairs on the plant were conducted using SikaTop Armatec-110 EpoCem reinforcing protective coating and a reprofiling mortar for structural concrete called Sika Monotop-615HB high build repair mortar.
Sika MonoTop-612 was applied by trowel to line the aerators and digesters and reprofile the concrete surfaces. Sikagard-720 EpoCem, a protective coating was subsequently applied as a 2mm thick layer to the Sika MonoTop-612. Sikagard-720 EpoCem is an unique product that protects concrete and acts as a moisture barrier to allow for rapid application of an epoxy coating onto surfaces with high moisture contents.
Sikagard-63N epoxy, a high chemical-resistant coating was applied to complete the buildup. Finally, all joints in the structures were sealed with Sikaflex Pro 3i and Sikadur Combiflex.
The community of Kwanobuhle is looking forward to their rehabilitated WWTW, which is expected to be completed in July 2020.
For more information, contact Sika:
Tel:+27 (31) 792 6500
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