Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 9, Problem 9.11P
To determine
The amount of money that the agency needs to put into a sinking fund annually to buy the land.
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Determine the volume of borrow and the volume of waste.
The level of nuclear waste that must be put in put in drums and surrounded by concrete, and put into clay lined landfill sites.
a. low level
b. none of these
c. high level
d. intermediate level
CleanTech manufactures equipment to mitigate the
environmental effects of waste.
2-6
A
(a) If Product A has fixed expenses of $15,000 per
year and each unit of product has a $0.20 vari-
able cost, and Product B has fixed expenses of
$5000 per year and a $0.50 variable cost, at what
number of units of annual production will A have
the same overall cost as B?
(b) As a manager at CleanTech what other data
would you need to evaluate these two products?
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- A gasoline driven pump and an electric pump are being considered for a use in a mine. If the minimum rate, of return is 12%. Annual taxes all in 3%. Gas Elect Gas Elect First cost 12000 25000 Life in Years 5 10 Salvage Value 1000 2000 Annual O.Cost 3200 1800 Annual Repairs 600 400arrow_forwardA new chemical remediation tank is needed. Current technology tanks, which cost $150,000, must be drained and treated every 2 years at a cost of $30,000; the tanks will last 10 years, and each will have a salvage value of 5% of first cost. A tank with new technology has just come on the market. There are no periodic maintenance costs, and a tank will last 20 years. If the new tanks cost $325,000, what minimum salvage value, as a percentage of first cost, would be required for this technology to be a better option? Use a 12% interest rate. (a) 10% (b) 36% (c) 57% (d) 72%?arrow_forwardAccording to the U.S. EPA, what is the current cost per ton for disposal of municipal solid waste in a landfill to the nearest $10/ton? (tipping fee) $ 50/ton $ 70/ton $ 60/ton O $ 40/tonarrow_forward
- 5) Assume each household produces 60 lb of refuse per week. How many customers can a 20-yd³ truck that compacts the refuse to 550 lb/yd³ collect before it has to make a trip to the landfill?arrow_forwardA landfill initially received 10,000 tons/day of waste. This receipt rate increases 10% per year. The landfill is closed at the end of the fourth year. Calculate the yearly gas production for 20 years after opening. What is the peak gas production in m3/yr.arrow_forward2. The maximum amount of solid waste collected per day for one week is presented below. All the solid waste are to be burned at a municipal waste to energy combustion facility at a constant rate of 100 tons/day. What is the required capacity of the storage pit that should be designed to accommodate twice the required daily capacity Day Solid waste collected (tons/day) Monday 150 Tuesday 130 Wednesday 120 Thursday 120 Friday 100 Saturday 80 Sunday 0arrow_forward
- Determine the volume of wastearrow_forwardA currently owned shredder for use in a refuse-powered electrical generating plant has a present net realizable value of $210,000 and isexpected to have a market value of $10,000 after 4 years. Operating andmaintenance disbursements are $100,000 per year. An equivalent shredder can be leased for $200 per day plus $80 per hour of actual use as determined by an hour meter, with both components assumed to be paid at the end of the year. Actual use is expected to be 1,500 hours and 250 days per year. Using a 4-year planning horizon and a MARR of 15%, determine the preferred alternative using the annual cost criterion. Solve, a. Consider only the above information and use the cash flow approach (insider’s viewpoint approach). b. Consider the additional information that the annual cost of operating without a shredder is $190,000 and use the cash flow approach (insider’s viewpoint approach).arrow_forwardDetermine: Use 3 Decimals a) Overhaul volume b) Volume of Borrow c) Volume of wastearrow_forward
- Construction and demolition (C&D) wastes account for 84% of the total wastes that directly goes to landfilI. Curtin University's research students found that 54% of these C&D wastes can be used in concrete and pavement. Estimate the maximum waste diversion rate if this research result is used by the government organizations and industries. (NOTE: only write down the whole number and do not write % with it. e.g. if your calculated civersion rate is 45.3%, , simply write just 45)arrow_forwardA new solid waste landfill site is being designed. The landfill will serve a population of 250,000 residents that generates 1 kg solid waste/day-person. Assume that yard waste makes up 15% of the total waste (by weight), paper makes up 40% of the total waste (by weight), and metals make up 10% of the waste (by weight). The municipality bans the placement of yardwaste in landfills and has a recycling program that collects one half of all discarded metals (the other half of metals goes to the landfill). What is the volume of waste that is discarded by the community every day? Assume a waste density at the curb of 140 kg/m^3.arrow_forwardProvide a Case Analysis for: Landfill: Is this the Engineering Solution for Solid Waste Management?arrow_forward
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