Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 9, Problem 9.6P
To determine
The interest rate, the company must obtain on loan to just breakeven.
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A town with 2,350 residents wants to establish a municipality owned and operated solid waste collection program. They can purchase one of three possible trucks that have the ff. characteristics: Truck A, 18 m^3 capacity Truck B, 15 m^3 capacity Truck C, 12 m^3 capacity If the truck is to collect the refuse for one-fifth of the town each day during a 5-day work week, then every residence will be collected during the week, and the truck will have to make only one trip per day to the landfill. Which truck or trucks will have sufficient capacity. Assume a rate of 1.75 kg/capita/d. Assume that the truck is able to compact the refuse to 350 kg/ m^3
What is the total tonnage of solid waste to be collected/wk? What is the total weight of waste to be collected everyday? What is the required truck capacity in cubic meters? Which truck should be bought?
How 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.
Question 1
Municipal solid waste is generated within a community from several sources, not just the List and discuss these sources.
In the town of Abesim, it is determined that the per capita waste generation rate is 1.4 kg(3.1 lb) per person per day. The collection is conducted once per week by the municipality. If the density of MSW in a typical trash container is 150 kg/m3, how many 120 L (30 gal) containers would be needed for a family of four?
From (b), collection trucks have a capacity of 11.5 m3(15 yd3), which can compactthe waste to a density of 420 kg/m3. How many customers can a truck handle in a single run, before departing for the transfer station?
In your community, is waste collection carried out by the municipality or by a privatehauler? Who collects the commercial wastes?
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- What is the points of convergence and devergence of waste management of to specified waste in a named country?arrow_forwardTHIS IS NOT GRADED QUESTION, PLZ SOLVE IT AS SOON AS POSSIBLE. ENVIRONMENTALENGINEERING-2 Reg.NO: 5395 • In slide 2 and 3 increase the no of loads (Column 2) by 5. • Calculate the total load at the end of the day. • Calculate the capita (per home). The no of residences in the locality (from which the whole waste generates) is the last digit of your REGISTRATION NUMBER. For example, your registration number is19PWCIV 5395… the number of residences will be 5395arrow_forwardHow would you define solid waste? State any three (3) factors which influence the amount of solid waste generated.arrow_forward
- Give two examples of scientific and technological approaches to managing solid waste on land and in water. Explain every example and include the sources you used.arrow_forwardFrom the following date, estimate the unit waste disposal rate per week for a residentialarea consisting of 1200 homes. The average occupancy is 4 persons per home. Theobservation location is a local transfer station that receives all of the wastes collected fordisposal. The observation period was one week.Data:Number of compactor truck loads = 10Average size of compactor truck = 20 yd3Number of flatbed loads = 6Average flatbed volume = 3 yd3Number of loads from individual residents’ private cars and trucks = 20 Estimatedaverage volume per domestic vehicle = 9 ft3arrow_forwardTHIS IS NOT GRADED QUESTION. Environmental Engineering-2 PLZ, SOLVE THIS PROBLEM AT EVERY PART. • Calculate the total load at the end of the day. • Calculate the capita (per home), if the no of residences in the locality (from which the whole waste generates) is 5395arrow_forward
- (a) In the town of Abesim, it is determined that the per capita waste generation rate is 1.4 kg (3.1 lb) per person per day. The collection is conducted once per week by the municipality. If the density of MSW in a typical trash container is 150 kg/m3, how many 120 L (30 gal) containers would be needed for a family of four? (b) From (a), collection trucks have a capacity of 11.5 m3 (15 yd3), which can compact the waste to a density of 420 kg/m3. How many customers can a truck handle in a single run, before departing for the transfer station?arrow_forwardThe 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 = 5arrow_forwardWhat can you do and goals about solid waste management project? 1.Preliminary Activities? 2.During Project Implementation? 3.Final Procedure?arrow_forward
- Discuss TWO (2) factors that may influence the rate of solid waste generationarrow_forward(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?arrow_forwardSuggest a treatment method on how to properly dispose your solid waste. How are you going to minimize your household solid waste?arrow_forward
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