Antone In short, it depends ...

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Antone

In short, it depends on the salinity of the raw water, the efficiency of the RO plant, cost of Diesel etc. You can probably work on 4 kWh/m3 desalinated water and R3/kWh. Thus, direct energy cost is about R12/m3. All other costs (antiscalant, chlorine, smbs, GAC, ex capital amortisation) can be R7/m3. All of this based on assumed raw water quality, very high level.

We (www.alveo.co.za) build containerised RO systems with integrated Solar power supply for the African market. Maybe that is a better option than Diesel?