Abstract |
A desk top study was made of the scaling and corrosion effects to be expected in municipal waste-water distillation. A municipal water re-use cycle was assumed in which sufficient waste-water distillate would be mixed with waste water treated for organic contaminant removal only, to give a mixture suitable for the municipal water supply. The study shows that the concentration of scaling materials is small enough that, in many cases, distillation at a temperature of 400F should be possible. An economic advantage over sea-water distillation would be expected as a result. Potential corrosion problems exist, but only experimental work will determine the seriousness of these problems. Continuous boiling experiments were carried out on Ann Arbor sewage to determine the fouling effects of organic contaminants. Distillation of secondary effluent at temperatures up to 250F should not result in fouling. Data were not obtained above that temperature. Operation with primary effluent does not appear feasible without additional treatment for removal of suspended materials. (Author) |