GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (OLD) EXAMINATION - SUMMER 2019
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Subject Code: 181303 Date: 13/05/2019Subject Name: Treatment Process Design And Drawing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
Q.1 (a) Explain the terms: Hydraulic Loading Rate, Surface Overflow Rate, Weir Loading Rate, 07
Scour velocity, Sludge Volume Index, Solid Flux, Volumetric Loading Rate.
(b) Enlist and explain the different types of Aeration systems used for wastewater treatment. (07
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Q.2 (a) Design and draw a bag filter for the flow of 5m³/s. 07
(b) Explain in detail flow measuring devices. 07
OR
(b) Enlist the points to be considered while selecting the treatment process train. 07
Q.3 (a) Design a tube settler module of circular cross section (with 50 mm diameter). Assume (7
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following conditions. (i) Average output required from settler =8MLD (ii) Length oftube=1m (iii) Angle of inclination=60°
(b) Enlist the site selection criteria of a wastewater treatment facility. 07
OR
Q.3 (a) Design a mechanically cleaned bar rack for a peak flow of 80 MLD. Flow condition in 14
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incoming sewer is given below:Diameter of sewer: 1.53 m
Depth of flow at peak flow: 1 m
Velocity at peak design flow: 0.8 m/sec
Depth of screen chamber flow with respect to sewer invert is 0.08 m
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Q4 (a) Design a clariflocculator for the flow of 10 MLD. 14
OR
Q.4 (a) Define the following terms: (j) Cane Velocity (ii) Velocity Gradient (iii) Air to cloth 07
ratio (iv) Saltation velocity (v) Cut'size diameter.
(b) Enlist and explain the advantages and disadvantages of Venturi scrubber. 07
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Q.5 (a) Write down the purpose & location of following unit in wastewater treatment plant. (a) 07
Ammonia Stripping (b) Equalization Tank (c) Filter (d) Coagulation & Flocculation
Tank (e) Grit Chamber (f) Lagoons (g) Sludge concentration and Dewatering System (h)
Sludge digestion-System (1) Sludge thickening Unit
(b) Write a short note: Plant layout and Hydraulic profile. 07
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ORQ.5 (a) Enlist the steps required to follow for the design of Rotating biological contactor (RBC). 07
(b) Design a cyclone separator with following particle size distribution 07
| Particle size in µm | 50 | 40 | 30 | 20 | 10 | 5 | 2 |
|---|---|---|---|---|---|---|---|
| Particle by wt. less than | 90 | 75 | 65 | 55 | 30 | 10 | 4 |
Assume the following
Density of particle = 2500 kg/m³
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Gas is essentially nitrogen at 150° CVolumetric flow rate = 4000 m³/hr
90% recovery of particle required
Viscosity of nitrogen at 150° C = 0.023 mPa s/m² Fc = 0.005 ® = 0.9
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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