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Solid Waste Management* - Jun 18
Civil Engineering (Semester 7)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question No. 1 is compulsory
(2) Attempt any three out of remaining five questions
(3) Draw neat diagrams wherever necessary
- Attempt any four:
1(a) What is leachate? How it is formed? (5 marks)
1(b) Write a note on material recovery facility. (5 marks)
1(c) Explain the functional elements of Municipal Solid Waste Management. (5 marks)
1(d) Explain factors affecting the generation rate of solid waste. (5 marks)
1(e) Write a note on E-waste. (5 marks)
2(a) Explain Hauled container system and stationary container system with neat sketches. (10 marks)
2(b) What are the characteristics of hospital waste and how it is treated and disposed off? (10 marks)
3(a) Estimate the moisture content of MSW sample with following Composition.
Component | % by mass | Moisture content % |
---|---|---|
Food waste | 20 | 70 |
Paper | 40 | 6 |
Cardboard | 10 | 5 |
Plastic | 10 | 2 |
Garden trimings | 10 | 60 |
Wood | 5 | 20 |
Tin cans | 5 | 3 |
(5 marks)
3(b) Explain the sources of solid waste (5 marks)
3(c) Explain factors affecting composting. Also explain types of Composting with neat sketches. (10 marks)
4(a) Determine the amount of methane gas generated from anaerobic digestion of 1 tonne of waste having composition $C_{55} H_{110} O_{35} N_2$
$$ C_a H_b O_c N_d + \frac{4a-b-2c+3d}{4} H_2O \rightarrow \frac{4a+b-2c-3d}{8}CH_4 + \frac{4a-b+2c+3d}{8} CO_2 + dN_3 $$ (10 marks)
4(b) Explain with a neat sketch, working of Municipal Incinerator. (10 marks)
5(a) Calculate the energy content of the solid waste having following composition using modified Dulong equation.
Component | % by mass |
---|---|
Carbon | 35 |
Hydrogen | 10 |
Oxygen | 40 |
Nitrogen | 8 |
Sulphur | 3 |
Ash | 4 |
(5 marks)
5(b) Describe various types of collection systems employed for House-to-house. State merits & demerits of each system. (10 marks)
5(c) Explain sampling of solid waste (5 marks)
Q6) Write short notes on (any four)
- a) Pyrolysis
- b) Volume Reduction of solid waste
- c) Refused Derived fuel
- d) Legal aspects of solid waste disposable
- e) Hazardos Waster
- f) Transfer Station (5 X 4 = 20 marks)