Give the difference between Primary Treatment and Advanced Treatment.
[3 marks]Differentiate between Surface Water Treatment & Ground Water Treatment.
[4 marks]Write a Short note on “Aerated Grit Chamber”. Draw a line sketch of it.
[7 marks]Which factors affect on Headloss of Screens. Explain each in detail.
[3 marks]Explain the importance of Alkalinity in Coagulation.
[4 marks]Estimate the headloss for a clean bar rack and 50% blockage of bar rack. Assume following data: 1. Approach Velocity in channel = 0.53 m/s 2. Velocity through Clean Screen = 0.93 m/s 3. Empirical discharge coefficient when bar rack is clean & blocked = 1.67& 1.43 respectively.
[7 marks]Enlist different types of Flocculators. Explain any one.
[3 marks]Explain the term “Zeta Potential” with neat sketch.
[4 marks]Abar screen is inclined at 60˚ angle from horizontal. The rectangular bars have width 15 mm & spacing 20 mm. Total Number of spacing are 25. Determine the headloss when the bars are clean & Velocity approaching the screen is 1 m/s. Assume bar shape factor is 1.83
[7 marks]Arectangular sedimentation tank has a length of 8 m and a width of 5 m. For a flow rate of 1 MLD, calculate the Weir Overflow Rate.
[3 marks]Assuming the diameter of a clarifier to be 18 m and the wastewater flowrate 9 MLD. Calculate the detention time and Surface Loading Rate of the clarifier having a wastewater depth of 2.4 m
[4 marks]Derive Stock’s Law for settling of discrete particle when flow pattern is Laminar.
[7 marks]Define: Scour Velocity & Terminal Velocity.
[3 marks]Write a short note on Tube Settler.
[4 marks]Find the terminal settling velocity of spherical particle with a diameter 0.5 mm and specific gravity 2.65 settling through water. Assume that Kinematic Viscosity 1.004 X 10-6 m2/s.
[7 marks]Define Effective Sand Size & Write it’s importance in Rapid Sand Filter (RSF).
[3 marks]Explain mechanism of Suspended Solid removal in filter.
[4 marks]Write the working of Rapid Sand Filter with neat sketch.
[7 marks]Explain the Chlorine reactions with Ammonia at different pH and define combined chlorine.
[3 marks]Explain the term Pre-Chlorination and Super Chlorination.
[4 marks]Give the comparison between Chlorine and Ozone as a disinfectant.
[7 marks]Define: Sludge Dewatering & Sludge Thickening. Mention the %solids content of Dewatered Sludge & Thickened Sludge.
[3 marks]Highlight the components of Filter Press in a sketch. Explain the process & Enlist advantages & disadvantages of it.
[4 marks]Explain reaction Chemistry of following Coagulants: i. Alum and ii. Lime
[7 marks]Give the Drinking Water Permissible Limit and explain the importance of following parameters: i. Fluoride ii. Total Dissolved Solids iii. Nitrates
[3 marks]Explain the Principle on which Decanter works. Enlist the components & explain purpose of each component with neat sketch.
[4 marks]Settling Column Tests on a Discrete Particle Suspension gave the following results from a depth to 1.3m. Sampling Time (min) 5 10 20 40 60 80 % of SS in sample 56 48 37 19 5 Determine the theoretical removal of solids from this suspension in a horizontal flow sedimentation tank with Surface Overflow Rate of 200 m3/m2 day.
[2 marks]