Purify and recycle waste

Diana Wemyss, Hout Bay

It seem strange that the City of Cape Town has decided to install a desalination plant in the harbour when all sewage, grey water and stormwater (what there is of it) is conveniently directed to one central outlet, the sewerage plant beyond the harbour (“Plant plan for Hout Bay”, Sentinel, September 1).

Why is it not possible to purify and recycle this waste back into the system? The amount of grey water that is pumped out to sea and wasted is enormous.

There does not appear to be much innovative thinking regarding water usage and saving. Our sewerage system was invented 200 years ago and remains unchanged, a water-guzzling idea that must surely have
been overtaken by new and modern technology. Why are new buildings not compelled to have grey water recycling and dry system sewerage?