Solid Waste Engineering
3rd Edition
ISBN: 9781305888357
Author: Worrell
Publisher: Cengage
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Chapter 3, Problem 3.7P
To determine
Estimated time to collect recyclables
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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
(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.
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- O 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_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_forward2. The maximum amount of solid waste collected per day for one week is presented below. All the solid waste are to be burned at a municipal waste to energy combustion facility at a constant rate of 100 tons/day. What is the required capacity of the storage pit that should be designed to accommodate twice the required daily capacity Day Solid waste collected (tons/day) Monday 150 Tuesday 130 Wednesday 120 Thursday 120 Friday 100 Saturday 80 Sunday 0arrow_forward
- 2) 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_forwardThe diameter of a 3 meter pipe decreases from 450 mm to 150 mm.Discharge is 150 liters per second.The pipeline was suspected to have had water stolen through an illegal connection. before said suspected illegal connection, a mercury difference of 350 mm was observed while a mercury difference of 200 mm was observed afterwards. estimate the stolen volume of water per dayarrow_forwardANSWER QUESTION 5-23arrow_forward
- Consider two identical small glass balls dropped into two identical containers, onefilled with water and the other with oil. Which ball will reach the bottom of the container first?Why?arrow_forwardwrite short note on Coagulation-flocculationarrow_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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