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<br />DANIEL C . M. CRABBE <br /> <br />Essential to the acceptance of the reverse osmosis process is the cost of the water produced <br />compared to alternative processes for accomplishing the same results. <br /> <br />(SLIDE 17) <br /> <br />For a 1,000,000 gallon per day "Permasep" reverse osmosis plant, Du Pont estimates a total <br />capital investment of $1,000,000, The total operatipg cost of water produced, including permeator <br />and plant amortization, is. $0,50-$0.60 per 1000 gallons. These costs are believed to be the present <br />capabilities. As new membranes now under development in the laboratory are brought to the com- <br />mercial point, these costs will be significantly reduced, <br /> <br />(SLIDE 18) <br /> <br />The foregoing has provided a brief view of the Du Pont Company's research efforts in waste <br />water reclamation through reverse osmosis, The "Permasep" permeator is not considered by Du Pont <br />as the panacea for all water problems, It will, however, be one of many valuable tools available to <br />water engineers in the future. <br /> <br />-14- <br />