STUPIDSID
Solve any one question from Q.1(a,b) & Q.2(a,b)
1(a)
Define treatability index. Write wastewater treatment option with respect to treatability index.
4 M
1(b)
Write the procedure to determine total volatile solids and its significance in wastewater treatment.
6 M
2(a)
Explain pumping of sewage with respect to need, location and types of pumps.
5 M
2(b)
Design a mechanically cleaned radial flow circular settling tank for treating sewage from a population of 25000 persons. Give
Maximum hourly flow = (1/14) of the daily flow
Volume of sludge = 1.19 1/c/d
Water consumption = 135 1/c/d
Maximum hourly flow = (1/14) of the daily flow
Volume of sludge = 1.19 1/c/d
Water consumption = 135 1/c/d
5 M
Solve any one question from Q.3(a,b) & Q.4(a,b)
3(a)
Write the difference between preliminary treatment and primary treatment.
5 M
3(b)
Write a short note on the self-purification of streams.
5 M
4(a)
Calculate the efluent BOD of a two stage trickling filter with the following data
i) Flow = 2.30 m3/min
ii) BOD5 = 300 mg/1
iii) Volume of filetr 1 = 900 m 3
iv) Volume of filter 2 = 900 m3
v) Filter depth = 2m
vi) Recirculation ration for both the filter = 1.5 Use NRC formula.
i) Flow = 2.30 m3/min
ii) BOD5 = 300 mg/1
iii) Volume of filetr 1 = 900 m 3
iv) Volume of filter 2 = 900 m3
v) Filter depth = 2m
vi) Recirculation ration for both the filter = 1.5 Use NRC formula.
6 M
4(b)
With the help of a neat sketch, explain the activated sludge process.
4 M
Solve any one question from Q.5(a,b) & Q.6(a,b)
5(a)
what do you understand by oxidation pond? Where it is used? What is its principle?
8 M
5(b)
Explain aerated lagoon with respect to its working principle,design parameters and applications.
8 M
6(a)
Write short note on phytoremediation for wasterwater treatment.
8 M
6(b)
Design an oxidation pond for a colony of 3000 population. The sewage flow is 1001/p/d. BOD5 is 300 mg/1. Assume necessary required data.
8 M
Solve any one question from Q.7(a,b) & Q.8(a,b)
7(a)
Design a sludge digestion tank with the following data
i) Average flow of sewage = 60 MLD
ii) Total suspended solids in raw sewage = 350 mg/1
iii) Volatile suspended solids = 250 mg/1
iv) Moisture content in the digested sludge = 87%
v) Removal from PST = 65%
vi) Moisture content in fresh sludge = 95%
i) Average flow of sewage = 60 MLD
ii) Total suspended solids in raw sewage = 350 mg/1
iii) Volatile suspended solids = 250 mg/1
iv) Moisture content in the digested sludge = 87%
v) Removal from PST = 65%
vi) Moisture content in fresh sludge = 95%
8 M
7(b)
Draw a flowchart of package sewage treatment plant and explain its working principle. Write its advantages and disadvantages.
8 M
8(a)
Design a gravity thickeners for thickening the combined primary and activated sludge from a treatment plant for 150000 population.
8 M
8(b)
Write working principle of USAB. Enlist design parameters of USAB and its limitations.
8 M
Solve any one question from Q.9(a,b) & Q.10(a,b,c)
9(a)
Enlist different units used in preliminary primary and secondary treatment in industrial wastewater treatment. Write its significance for which impurities to be removed.
9 M
9(b)
Explain equalization and neutralization unit process with respect to its working principle, need, factors affecting the process and application.
9 M
10(a)
Draw a neat sketch showing the points where spent wash is generated in the distillery.
6 M
10(b)
Discuss the characteristics of dairy industry.
4 M
10(c)
Draw a flow chart showing various treatment units used to treat sugar industry wastewater. Explain the important units.
8 M
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