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Submitted by Kevin Tayler on

With regard to the Delhi initiative, it would be interesting to know what 'distillation' means in the context of wastewater treatment. Distillation is a specific type of process - one dictionary definition is 'purification of water by successive evaporation and condensation'. Is this really what was proposed or would another term be more appropriate? My other question relates to the 'toilet machine'. I would imagine that its operational costs would be fairly high. Has any assessment of costs and potential revenue been done?