Download GTU BE/B.Tech 2018 Winter 8th Sem Old 181303 Treatment Process Design And Drawing Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (OLD) EXAMINATION — WINTER 2018
Subject Code: 181303
Subject Name: Treatment Process Design And Drawing

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Instructions:
1. Attempt all questions.

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1. (a) Write a short note: Flow measuring devices. [07]
   (b) Write a short note on MBBR. [07]
2. (a) Enlist the design steps of cyclone separator with all the necessary equations. [07]
   

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   (b) Design a tube settler module of circular cross section (with 50 mm diameter). Assume following conditions. [07]
   1. Average output required from settler = SMLD
   2. Length of tube = 1m
   3. Angle of inclination = 60°

   OR

   (b) Explain the terms: Hydraulic Loading Rate, Surface Overflow Rate, Weir Loading Rate, Scour velocity, Sludge Volume Index, Solid Flux, Volumetric Loading Rate. [07]

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3. (a) Enlist and explain the different types of Aeration systems used for wastewater treatment. [07]
   (b) Design and draw a bag filter for the flow of 5 m³/s. Design cyclone with following particle size distribution: [14]

   OR

   Particle size in um	Particle by wt. less Than
   50	90
   40	75
   30	65
   20	55
   10	30

   Assume the following:

   • Density of particle = 2500 kg/m³
   • Gas is essentially nitrogen at 150° C

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   • Volumetric flow rate = 4000 m³/hr
   • 90% recovery of particle required
   • Viscosity of nitrogen at 150°C = 0.023 mps/m²
   • Fc=0.005, ¢ = 0.9

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4. (a) Enlist the points to be considered while selecting the treatment process train. [07]
   (b) Draw a neat process flow diagram of sewage treatment plant and show unit operations and unit processes. [07]

   OR

   (a) Design a Clariflocculator to treat a flow of 100 MLD. [14]
5. (a) Explain the operational problems involved with Venturi scrubber. [07]
   (b) Explain the design criteria for Membrane Bioreactor. [07]

   OR

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   (a) Design two identical bar rack screens for a treatment plant handling the peak flow of 210 MLD. Assume the other conditions as follows: [14]
   • Velocity through screen at peak flow = 1.2 m/s
   • Clear spacing between bars = 25 mm
   • Bar size = 50 mm * 10 mm
   • Angle of bars with horizontal = 80°
   • Peak factor =2

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   • Depth of flow in chamber = 1.1 m

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