Municipal Solid Waste Management Week 3 NPTEL Assignemt Answers 2025

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✅ Subject: Municipal Solid Waste Management
📅 Week: 3
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Municipal Solid Waste Management Week 3 Assignemt Answers 2025

1. Which of the following is not a unit operation of collection system?

Pickup
Haul
On-site
Off-route

Answer : See Answers

2. In waste collection system, Haul Container System includes

Time required to reach the location where the waste will be emptied
Actual picking up of the loaded container
Redeposition of the empty container
Time spent at the location where the waste is unloaded

Answer :

3. In waste collection system, Off-route collection system include

Redeposition of the empty container
Time spent at the site
Actual picking up of the loaded container
Time spent on all non-productive activities

Answer :

Solve the problem
A private solid waste collector wishes to locate MRF near a commercial area. The collector would like to use a hauled container system but fears that the haul costs might be prohibitive. What is the maximum distance away from the commercial area that the MRF can be located so that weekly costs of the hauled container system do not exceed those of the stationary container?
Assume that one collector-driven vehicle will be used in each system. For the purpose of this example assume the travel times t1 and t2 are included in the off-route factor.

Assume the following data for questions 4 to 10
Hauled Container system
a) Quantity of solid wastes = 230 m3/wk
b) Container size = 6 m3/trip
c) Container utilization factor = 0.67
d) Container pickup time = 0.33h/trip
e) Haul time constants: a = 0.022h/trip and b = 0.014h/km
f) At-site time (s) = 0.053h/trip
g) Overhead costs = ₹28464 per week
h) Operational Costs = ₹1067 per hour of operation
Stationary Container system
a) Quantity of solid wastes = 230 m3/wk
b) Container size = 6 m3/location
c) Container utilization factor = 0.67
d) Collection vehicle capacity = 23 m3/trip
e) Collection vehicle compaction ratio=2
f) Container unloading time = 0.05h/container
g) Haul time constants: a = 0.022h/trip and b=0.014h/km
h) At-site time (s) = 0.01h/trip
i) Overhead costs = ₹53370 per week
j) Operational costs = ₹1423 per hour of operation
Location characteristics
a) Average distance between container locations = 0.16 km
b) Constants for estimating driving time between container locations for both haul and stationary container systems are: a = 0.060 h/trip and b = 0.042 h/km