Engineering Economics and Pollution Prevention1. You are working for a factory and have been asked to assess the economic impacts of implementing a new pollution prevention program at the factory. The factorymanagers required you to design the program so that the production from the factoryis not reduced by the pollution prevention program. Currently, the factory has anannual operation cost of $480,000/yr. It currently costs the factory $75,000 per yearto dispose of its waste. The plan that you developed will have an initial equipmentcost of $100,000. However, the result of your plan will reduce the annual operatingcost to $400,000/yr and the waste disposal cost to $30,000/yr.a. Assuming a constant discount rate of 7 percent, how long will it take the factoryto break even on their investment in your pollution prevention program?2. A metal plating operator is considering installing an ion exchange unit to recover and reuse metals currently lost in the rinse waters from the plating line. The companypresently pays a sewer usage fee of $4.00 per kg of metal sent to the sewagetreatment plant. The metal plater is currently discharging 1,000 kg/yr of metal to thesewer. The metal costs the company $120 per kilogram to purchase. The ionexchanger will recover 98 percent of this metal, and all of this recovered metal can bereused in the metal plating operation. The ion exchange unit will cost $50,000 topurchase and install and $12,000 per year to operate.a. What is the net cost or benefit of the project, assuming a discount rate of 10percent over 10 years (based on an expected equipment life of 10 years)?b. What is the payback period for the ion exchange unit?c. Based on your economic analysis, would you recommend that the ion exchangeunit should be installed to the metal plater? Why?d. Discuss how two other factors besides economics might influence the decision.

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