Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 3, Problem 3.21P
To determine
Least expensive transportation alternative
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Assume it cost an average of $0.03/ton.min to haul waste from collection to transfer station and then from the transfer station to landfill using a transfer vehicle and the operation cost of the transfer station is $2/ton. The cost of hauling waste directly from the collection point to landfill is $0.1/ton.min. The speed limit of any type of vehicle carrying waste between the collection point, the transfer station, and the landfill is 40 miles/hr.
At/above what distance (miles) is using a transfer station more economical? Round your answer to the nearest whole number. Show your work.
Assume it costs 30 cents per ton per mile to operate a garbage truck and 10 cents per ton per mile to operate a transfer truck. A transfer station also has fixed cost of $20 per ton. If it is 40 miles to the landfill. What would be your least expensive transportation alternative?
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?
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- A town with 2,350 residents wants to establish a municipality owned and operated solid waste( garbage) collection program. They can purchase one of three possible trucks that have the ff. characteristics: Truck A, 18 m3 capacity Truck B, 15 m3 capacity Truck C, 12 m3 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/capitald. Assume that the truck is able to compact the refuse to 350 kg/ m3 * 14.1 5,757.5 4,935 24,675 28.787 5 Truck Truck Truck 16.45 A B 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 сарacity in cubic meters? Which truck ооо о о о о should be bought ?arrow_forward7) Suppose a crew of two people requires 3 minutes per stop, at which they can service four customers. If each customer generates 50 lb of refuse per week, how many customers can they service if they did not have to go to the landfill?arrow_forwardA community of 100,000 people wants to initiate public garbage collection and disposal to a landfill that is 30 miles away. The collection frequency is once a week. For garbage transportation to the landfill, there are two options: no transfer station and a transfer station that is 10 miles away from the community and is on the way to the landfill. Determine: Total transportation cost for the no transfer station option. Total transportation cost for the transfer station option. Breakeven point (for the two options), if the transfer station can be placed anywhere on the way to the landfill. Your answer must be in term of distance between the station and the community. Assumptions/given information: Generation rate: 4 lbs/person/day. As collected density: 200 lb/yd3. Collection truck size of 20 yd3 with a compaction ratio of 3. Transfer truck/trailer size of 60 yd3 with no compaction capability. Costs: 30 cents per mile per collection truck, 10 cents per mile per transfer…arrow_forward
- 2) A family of five people generates solid waste at a rate of 2 lb./cap/day. Collection is once a week. How many customers can a 20-yd³ truck that compacts the refuse to 500 lb/yd³ collect before it has to make a trip to the landfill? (UoD, B.Sc. 2012).arrow_forwardO Solid waste from a park is to be collected in large containers. It is estimated that the average time to drive from the garbage to the first container t, and from the last container t₂ to the garbage each day will be 15 and 20 minutes, respectively. If the average time required to drive between the containers is 360 seconds and the two-way distance to the disposal site is 50 km (speed limit 88 km/hr), determine the number of containers that can be emptied per day, based on an 8-hour work day. Note: at 88 km/hr speed, a = 0.016, b=0.011; S = 0.133, W=0.15; Pc+U= 0.4 h/trip.arrow_forward2) Calculate the number of collection vehicles a community would need if it has a total of 4000 services (customers) that are to be collected once per week. 3) Calculate the number of collection vehicles a community would need if it has a total of 6000 services (customers) that are to be collected once per week. 4) The number of collection vehicles a community would need for solid waste collection inarrow_forward
- Methods for burying and covering solid waste in sanitary (solid waste) landfill. Explain with the help of diagram?arrow_forwardCalculate the number of stops in each trip of 1.50 h of refuse collection for the following data v= velocity = 15 km/h – 4.17 m/s d= distance= 750 m n = number of containers to empty per stop=1 tc= time to empty one bin/container= 650 sarrow_forwardThe first decision to be made is how the solid waste container will get from the residence to the collection vehicle. Compare the advantages and disadvantages of the two methods of collection truck routing. i. Daily route method ii. Single load methodarrow_forward
- Landfills are dynamic systems, with several design components. Using no more than three sentences explain why some types of waste are more suitable for final disposal through landfills than other kinds of waste. Very briefly outline the impact of poorly designed landfills on water quality.arrow_forward(84 Solid waste from a park is to be collected in large containers. It is estimated that the average time to drive from the garbage to the first container t, and from the last container t₂ to the garbage each day will be 15 and 20 minutes, respectively. If the average time required to drive between the containers is 360 seconds and the two-way distance to the disposal site is 50 km (speed limit 88 km/hr), determine the number of containers that can be emptied per day, based on an 8-hour work day. Note: at 88 km/hr speed, a = 0.016, b= 0.011; S = 0.133, W = 0.15; Pc+U= 0.4 h/trip.arrow_forwardA community of 1200 homes cannot pay for the initial and operating costs of the recycling collection vehicles that were to be used. Instead, residents are to haul recycling containers to a drop off centre operated by the community. Calculate the number of vehicles from which recyclable materials must be unloaded per hour at the recycling centre. Assume the centre is open for 8 hours per day, two days a week, and that 40% of the residents will deliver recycling containers. Also assume 75% of the participants will take their separated materials to the drop-off centre once a week and the remaining 25% of participants will bring separated materials to the centre once every two weeks.arrow_forward
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ISBN:9781305635203
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