An environmental engineer wants to evaluate three different methods for disposing of a non-hazardous chemical waste: land application, fluidized-bed incineration, and private disposal contract. Use the estimates below to help him determine which has the least cost at i = 10% per year, on the basis of an (a) annual worth, and (b) present worth evaluation.
 FIGURE 1.png)
(a) AWLand = -150,000(A/P,10%,4) – 95,000 + 25,000(A/F,10%,4)
= -150,000(0.31547) – 95,000 + 25,000(0.21547)
= $-136,934
AWIncin = -900,000(A/P,10%,6) – 60,000 + 300,000(A/F,10%,6)
= -900,000(0.22961) – 60,000 + 300,000(0.12961)
= $-227,766
AWCont = $-140,000
Select land application
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