Unformatted text preview: saturation time of the system. The optimum support diameter is 36 inches and composed of 84 membranes. The total capital investment to construct a plant to create enough membranes to treat all of the Norman wells is $78,000. The production cost for a year is $328,000. The cost to Norman for the membranes and their replacement for a year is $550,000. The electricity for pumping water from the well, through the membrane, and to the holding tanks located throughout Norman is $264,000. The total cost to Norman, including a 15 percent product mark up, to use the membranes for a year is $820,000. This is $0.70 per 1000 gallons. Norman saves roughly $2.7 million year. For the membrane production company, the return on investment after 10 years, with Norman as the sole consumer, is 276 percent with a net present worth of $900,000....
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- Spring '10
- Chemical Engineering, iron oxide membranes