STUPIDSID
Solve any one question from Q.1(a,b) &Q.2(a,b)
1(a)
Differentiate between separate and combined sewerage system.
5 M
1(b)
Explain the procedure for determination of BOD.
5 M
2(a)
What are the sources of sewage and how sewage flow quantity is estimated?
5 M
2(b)
Explain the procedure for determination of COD.
5 M
Solve any one question from Q.3(a,b) &Q.4(a,b)
3(a)
Determine diameter and depth of primary sendimentation tank for sewage flow 10 million liters per day.
Give data.
Detention time = 2.5 hours
ii) Surface loading rate = 40000 1/m2/d
Give data.
Detention time = 2.5 hours
ii) Surface loading rate = 40000 1/m2/d
5 M
3(b)
Write streeter-Phelps equation, explain the terminology and write its application.
5 M
4(a)
An average operating data for conventional activated sludge treatment plants is as follows
Determine.
1) Food to microoganisms ratio
2) Sludge age
3) Percentage of efficiency of BOD removal
| i) | Sewage flow = 30000m3/d |
| ii) | Volume of aeration tank = 10500m3 |
| iii) | Influent BOD = 200mg/l |
| iv) | Efflunet BOD = 20mg/l |
| v) | Mixed liquor suspended solid = 3000mg/l |
| vi) | Effluent suspended solids = 30mg/l |
| vii) | Waste sludge suspended solids = 9500mg/l |
| viii) | Quantity of waste sludge = 200m3/d |
Determine.
1) Food to microoganisms ratio
2) Sludge age
3) Percentage of efficiency of BOD removal
6 M
4(b)
Differentiate between single stage and two stage filter.
4 M
Solve any one question from Q.5(a,b) &Q.6(a,b)
5(a)
Design an oxidation pond for following data
| i) | Location : 24° Latitude |
| ii) | BOD loading at 24°Latitude : 225kg/ha/d |
| iii) | Elevation : 900 m above sea level |
| iv) | Mean monthly temperature : 30°maximum and 15° minimum |
| v) | Population to be served : 10000 |
| vi) | Sewage flow : 100lpcd |
| vii) | Desired effluent BOD5 : 20mg/L |
| vii) | Pond removal constant at 20°C : 0.1/d |
8 M
5(b)
Write wastewater treatment principle of phytoremediation technology and explain its working with schematic sketch.
8 M
6(a)
A wastewater flow is 10000 m3/d, BOD5 is 200 mg/L, design an aerobic flow through type lagoon to serve a town of 50000 persons, using a ideal complete mixing model. Since the lagoon is proposed to be followed by another treatment unit, its size can be restricted to give a detention time of only 3 days. Given data k=0.015 per day at 20°C, Y= 0.5, kd=0.07 per day
8 M
6(b)
Write wastewater treatment principle of root zone cleaning system and explain its working schematic sketch.
8 M
Solve any one question from Q.7(a,b) &Q.8(a,b)
7(a)
Draw a neat sketch of upflow sludge blanket (UASB)reactor. Explain the principle of working and its advantages and disadvantages
8 M
7(b)
The sludge is known to be 70% organic and 30% inorganic in nature. Approximately 60% of the organic fraction is converted to liquid and gaseous end products after a 30 day period. The digested sludge has a solids content of 5% and must be stored for periods of up to 85 days . Determine the volume of requirement for a standard rate single stage digester. The raw sludge loading rate is 80m3/d.
8 M
8(a)
Write principle and stages of anaerobic digestion. Explain factors affecting digestion process.
8 M
8(b)
Explain any two methods of sludge disposal with advantages, disadvantages and application.
8 M
Solve any one question from Q.9(a,b,c) &Q.10(a,b)
9(a)
Explain methods of waste water sampling.
6 M
9(b)
Write short note on eqalization and neutralization.
6 M
9(c)
Draw and explain units of treating dairy wastewater.
6 M
10(a)
Explain the following points related to sugar industry.
i) Flow sheet manufacturing process and wastewater generation
ii) Characteristics of wastewater
iii) Flow sheet wastewater treatment.
i) Flow sheet manufacturing process and wastewater generation
ii) Characteristics of wastewater
iii) Flow sheet wastewater treatment.
10 M
10(b)
Explain in brief primary and secondary treatment process adopted for treating industrial wastewater.
8 M
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