The municipality said it believed opportunities existed to convert the sludge from the Zeekoegat sewerage works in Pretoria East into energy as an alternative power source.
Utility Services MMC Darryl Moss said the groundbreaking initiative was based on a feasibility study already undertaken to explore the proposal of a sewage-to-gas source of energy. The study was funded by the German government and was part of the City’s energy strategy to reduce carbon emissions and its environmental footprint through cleaner energy production.
Moss said: “The operation behind it is that you take the sludge from a sewerage plant and you react it to generate biogas, and then you use the biogas as the energy source to drive and generate power.” He said the City’s modern sewerage plant in Pretoria East contained quality sludge which was fairly good and could be used to generate biogas.
“The feasibility study showed that we would generate 80% of the power required for that plant, and we would reduce our carbon footprint on that plant by 70%,” he said.