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.
Problem 2Approximately 30 kg of consumer products are brought into a home by its residents on a weekly basis. Two thirdsof this quantity are used as food, and about 2 kg of these products remain in the house. Every week, 75% of thewaste is collected at the curb, with the remainder sent to recycling.1. Plot the mass balance diagram of the house showing the mass of inputs, accumulations and outputs.2. Estimate how much solid waste the residents leave out to the curb each week.
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A sanitary landfill has available space 25 ha at an average depth 12 m. Nine hundred sixty-five (965) cubic meters of solid waste are dumped at the site each day for 5 days per week. This waste is compacted to twice its delivered density. Draw a mass-balance diagram and estimate the expected life of the landfill in years.
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- A truck unloads 20m³ of gravel at a landfill. You, who own the truck, plan to purchase an uncovered box in which to transport the gravel on multiple trips. Your cost is the cost of the box plus $2.00 per trip. The box must be half a meter high, but you can choose the length and width. The cost of the box will be $20.00 per square meter for the front and back; and $10.00 per square meter for the bottom and sides. What should be the dimensions of the box you should purchase to minimize your total costs?arrow_forwardCalculate the area required for a landfill having a projected life of 30 yrs with a 250 000 population providing 2.10 kg per capita per day of waste? Given the density if waste of 472 kg, where in the limitation is that the landfills height do not exceed at 16 m?arrow_forwardA landfill receives 10000tons/day of waste. This receipt rate increases 10% per year. The landfill is closed at the end of the fourth year. Using the exponential model calculate the yearly gas production for 20 years after opening. What is the peak peak gas production in m3/yr.arrow_forward
- Municipal solid waste is generated within a community from several sources, not just the household. List and discuss these sources? Define the term; Resource recoveryarrow_forwardIn 1-2 sentences, explain why you think the Aor. Landfill in Clark County, Nevada was chosen as a location for the landfillarrow_forwardA sales engineer claims that his pump is economically justifiable. He says that for a cost of $250,000.00, it will havea market value of $30,000 at the end of 10 years. If the increased productivity attributable to this project would be$38,804 per year, is he lying? Take MARR = 10%arrow_forward
- A public utility is trying to decide between two different sizes of pipe for a new water main. A 250-mm line will have an initial cost of P1,600,000, whereas a 300-mm line will cost P1,840,000. Since there is more head loss through the 250-mm pipe, the pumping cost for the smaller line is expected to be P100,000 per year more than for the 300-mm line. If the pipes are expected to last for 15 years, which size should be selected if the interest rate is 12% semi-annually? Use AW, PW, and FW methods in your solution analysis.arrow_forwardAn industry discharges 10 mgd of a waste that has a BOD5 of 2000 mg/L. How many pounds of BOD5 are discharged?arrow_forwardA company plans to construct a wastewater treatment plant to treat and dispose of its wastewater. Construction of a wastewater treatment plant is expected to cost $2 million and an operating cost of $300,000/yr. Determine the NPV of the total cost (including the capital investment and total operating expenses) over the period of 30 years at an interest rate of 6.5% for treating the wastewaterarrow_forward
- Calculate the annual volume of solid waste produced assuming the volume rate of generation of 1 kg per capita per day by a six workers. Given that the density of waste is 480 kg per cu. meter in a company?arrow_forwardHow many residences can be served? If we have a compactor truck which has a capacity of 30 yd3, each truck makes 3 trips/day 5 days a week, each residence has 3 people and each person produces 4lbs of waste. The density of the compacted waste is 425 lbs/yd3.arrow_forwardA 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_forward
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ISBN:9781305635203
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