3. A MSW facility is designed to handle solid waste generated by a town at a rate of 75,000 kg/d. The waste is delivered by compactor truck 4 days/week, and 30% of the waste is recycled. The density of the disposed waste before compaction is 120 kg/m3. The waste is compressed to a compaction ratio of 4.0. Daily cover takes up 20% of the total landfill cell volume, and a single lift is 3.5 m high. Engineers have designed the landfill for two lifts, and a total of 6.0 hectares are available for this MSW landfill. Calculate how long (in years) it will take to fill up this landfill as designed.

3. A MSW facility is designed to handle solid waste generated by a town at a rate of 75,000 kg/d. The waste is delivered by compactor truck 4 days/week, and 30% of the waste is recycled. The density of the disposed waste before compaction is 120 kg/m3. The waste is compressed to a compaction ratio of 4.0. Daily cover takes up 20% of the total landfill cell volume, and a single lift is 3.5 m high. Engineers have designed the landfill for two lifts, and a total of 6.0 hectares are available for this MSW landfill. Calculate how long (in years) it will take to fill up this landfill as designed.

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter2: Municipal Solid Waste Characteristics And Quantities

Section: Chapter Questions

Problem 2.13P

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(ii) The Kumasi landfill serves a population of 253,000. Each week 325 trucks bring a total of 2180 tonnes of MSW to the landfill. Each truck averages two loads per day. The trucks each has a capacity of 4.5 tonnes, and operate 5 days per week. (a) How much MSW is generated per person? Give your answer in kg.capta-1.day. (1 tonne = 1000kg). (b) What is the average load (in metric tonnes) in each truck when they at the landfill? At what capacity are the trucks operating? (c) If the density of the waste is 265kg.m-3, what is the volume of the MSW disposed of at the landfill each week?
The Kumasi landfill serves a population of 253,000. Each week 325 trucks bring a total of 2180 tonnes of MSW to the landfill. Each truck averages two loads per day. The trucks each a capacity of 4.5 tonnes, and operate 5 days per week. (a) How much MSW is generated per person? Give your answer in kg.capta-1.day. (1 tonne = 1000kg). (b) What is the average load (in metric tonnes) in each truck when they at the landfill? At what capacity are the trucks operating? (c) If the density of the waste is 265kg.m-3, what is the volume of the MSW disposed of at the landfill each week?
Estimate the life of a landfill (years) given a population of 250,000 people, 40 acre, a maximum depth of 50 feet below ground, a pit slope of 1:3 and final slope of 1:4. The coversoil occupies 22% of the compacted volume. There is a 42% diversion rate, the waste is compacted to 1,270 lb/yd3, the population is stable and generates 6.2 lb/capita/day. The landfill area is square and the max height of the landfill is 33 yd.
Suppose a city of 50,000 people generates 40,000 tons of MSW per year. At current recovery and recycling rates, 22 percent of that is recovered or recycled and the rest goes to a landfill. Suppose also that the landfill density is 1,000 lb/yd^3, cell depth is 10 ft, and 80 percent of the cell is MSW.(a) What lift area would be required per year?(b) If the current landfill site covers 50 acres, including 10 acres needed for access roads and auxiliary facilities, and two more lifts are envisioned, how long would it take to complete this landfill?
The Tatooine community will landfill plastic along with the inert material and rubber. Assuming that inert material and rubber together account for 54.8% of the remainder waste, determine the volume of the landfill if it is to operate for 24 years. The density of the compacted waste is 895 kg/m³. Recall that the community has a population of 600663 residents and generate 0.7 kg of solid waste per day per person. The main waste fractions are shown in the table below: Waste fraction Food waste Paper Plastic Yard waste Percent (%) 41.1 19.8 13.9 8.4 The remainder of the waste consists of metal, glass, inert material and rubber. Answer: * Om^3 Okm^3 You did not give the correct unit. The volume of the landfill is determined by calculating landfilled portion of the waste, that is the plastic content + the inert and rubber portion of the waste. The correct answer is: 9.51e5 m^3
A landfill is to be designed to serve a population of 200000 for a period of 25 years. The solid waste generation is 2kg/person/day. The density of the uncompacted SW is 100 kg/ m³ and a compaction ratio of 0.4 is suggested. The ratio of compacted fill (i.e. SW+Cover) to compacted SW is 1.5. The landfill volume (in million m3) req. is
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2. A municipal solid-waste site for a city must be located at Site A or Site B. After sorting, some of the solid wastes will be transported to an electric power plant where it will be used as fuel. Data for the hauling of solid wastes from each site to the power plant are shown in Table below SITE B 3 kilometers P100,000 SITE A Average hauling distance Yearly rental fee for solid - P5,000 waste site Hauling Cost 4 kilometers P1.50 per m - km P1.50 per m - km If the power plant will pay P8.00 per mºof sorted solid waste delivered to the plant, where should the solid-waste site be located? Use the city's viewpoint and assume that 200,000 m3 of wastes will be hauled to the plant for one year only. What site must be selected? Show your computation and defend your answer. (20 points)
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The City of Forty-Five (population 465,565) has requested your assistance in evaluating its solid waste collection system. Determine the mean time per collection stop plus the mean time to reach the next stop, the number of pickup locations per load, and the minimum number of trucks the city must own. The City of Forty-Five collection data are as follows: Average truck capacity = 12.5 m3; Average observed compaction ratio = 2.87 Crew size = 2; Number of pickups = 1 /wk (no rear-of-house service) Average number of cans per stop = 2.63/wk at 0.1136 m3/can Average number of residents per stop = 5 Average uncompacted density = 105.76 kg/m3 Average transport time to disposal site including delays and dumping = 1.78 h/trip Average number of trips to disposal site = 2/d; Rest breaks = 2 at 28.0 min Average maintenance downtime = 37.0 min/d; Average workday = 8.00 h Average percent of trucks out of service for major repairs = 15.0% Number of workday per week = 5
1. A sanitary landfill has available space of 16.2 ha at an average depth of 10 m. Seven hundred sixty-five (765) cubic meters of solid waste are dumped at the site 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.
How many cubic yard of solid waste can be placed on a regulation soccer field (200 ft × 300 ft) subject to the following constraints and conditions? Slope of all landfill faces = 3 to 1 Covered material will be excavated from the site Neglect cover material requirements Lift height = 10 ft Maximum height of landfill = 20 ft Waste generation rate = 4.1 lb/capita day Community population = 80,000 How many soccer fields would be required per year to dispose of the waste from the community, assuming the in-place specific weight of the waste is 1,000 lb/yd3?