Solid Waste Engineering
3rd Edition
ISBN: 9781305888357
Author: Worrell
Publisher: Cengage
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Chapter 3, Problem 3.20P
To determine
The number of commercial location that can be serviced in one day.
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Answer 3-20 plus the following question: If 100 commercial locations are to be serviced twice a week, and there are 5 workdays per week, how many trucks are needed?
Calculate 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 s
Using simple calculation method.
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- 19. Shown below is a mass haul diagram. Determine the free haul volume. a) 1000 m³ c) 2000 m² b) 2500 m² d) 4500 m² 20. Determine a) 1000 m² the volume of waste in item 19. a) 1000 m² b) 2500 m² c) 2000 m² d) 4500 m³arrow_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_forwardEstimate the number of dump trucks requireu transportation of 1125 cum of materials per day for average lead of 5 km with the following data; Capacity of one dump-truck = 15 cum Speed during empty haul @ 25 km/hr and loaded haul @ 20 km/hr Loading time for one dump truck = 10 minutes. Take 10% in stand by and 6 hours working period in a day.arrow_forward
- The 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_forwardAssume two truckloads, 4.02 hours of actual collection per day, the truck be if it has a compaction ratio of 3.5:1, and pickup vehicle averages 5 mph between stops that are on the average separated by 150 feet. Each stop collects from two households that each put out two full 30-gallon (4.4 cubic feet) containers. It takes an average of 20 seconds to empty one container. What is the time required to serve each stop in seconds?arrow_forwardAssume 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.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_forward3.37 A company produces four products in its production facility. The facility has four de- partments labeled A-D. The routing information, production quantities, and volumes for each product are given in the table below. Product 1 2 3 4 Production Quantities (per day) 15 20 14 10 Routing B-A-D-C-A A-D-C-B A-C-D-B B-A-C-D Volume (compared to Product 1) 1 1 2 0.5 Determine the from-to chart. Recommend a flow pattern.arrow_forwardI need the carrect answer as soon as possible pleasearrow_forward
- (a) Explain and sketches the types of incidents for the activities of loading and unloadingarrow_forwardAnswer 3-21arrow_forwardExample 7-2 Selection of container size for use at a commercial facility A commercial facility produced the following quantities of solid waste each week for a calendar quarter of operation. Using these waste production data, determine the size of container at which it becomes more cost effective to make extra pickup trips, on call instead of using a larger-sized container. Assume the data given below are applicable. 1. Waste production data Week no. 1 2 3 4 5 6 7 2. Collection system data Capacity yd3 30 35 40 45 50 - - Waste yd3/wk 41 30 35 34 39 25 32 - Week no. 8 9 10 11 12 13 Capital cost $ Annual O&M cost &/yr 3000 150 175 225 Waste yd3/wk 27 37 36 33 28 31 3500 4000 4900 6100 Cost per trip= 50$.00/trip Useful life of the containers= 10 yr Discount rate=10% Capital recovery factor= (i=10%, n=10yr) = 0.16275 300 400arrow_forward
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