Why do wastewater flow rates fluctuate? Explain the variations that are significant to the design of the treatment plant.
[3 marks]Explain the procedure for statistical analysis of wastewater flow rate data.
[4 marks]Draw neat sketch and explain Conventional Waste-water Treatment Plant and explain the different units along with their functions.
[7 marks]Define 'Grit Chamber'. State its purpose.
[3 marks]What is unit process? List down different unit processes used for waste water treatment.
[4 marks]Enlist functional zones of sedimentation tank and explain sludge and outlet zone in detail.
[7 marks]Explain types of Grit Chambers with neat and labeled sketches.
[7 marks]State the equations of Head-loss across coarse and fine screens.
[3 marks]Discuss in brief: Mechanism of flocculation.
[4 marks]Explain a jar test procedure for determining the optimum dose of chemical coagulant and what is the relationship between pH, alkalinity and the alum dose?
[7 marks]Define screens and screenings? State the purpose of screens.
[3 marks]Enlist all the mechanisms of coagulation and explain them.
[4 marks]Prepare a list of different types of chemical coagulants and explain along with chemical reactions involved.
[7 marks]Enlist the assumptions for ideal sedimentation tank.
[3 marks]Describe Newton’s law (Stokes law) for settling velocity of discrete particles.
[4 marks]Explain the construction and working of Slow Sand Filter with neat sketch.
[7 marks]Write a short note on tube settler.
[3 marks]Find terminal settling velocity of spherical particle with diameter of 0.05mm of specific gravity 2.65 settling through water having kinematic viscosity 1.004 x 10 -4 m /sec.1
[2 marks]Draw a neat sketch of Rapid Sand Filter (RSF) and explain its construction and working.
[7 marks]Explain Thickening of waste sludge.
[3 marks]Describe the various factors that affect efficiency of wastewater disinfection.
[4 marks]Explain Sludge Drying bed and its design criteria.
[7 marks]Explain why chlorination is mostly used for disinfection of domestic wastewater.
[3 marks]Explain aerobic and anaerobic sludge digestion.
[4 marks]Explain Break-point chlorination and its significance to determine the chlorine demand
[7 marks]