Physico-chemical Treatment Technology — Winter 2022

What is unit process? List down different unit processes used for waste water treatment.

Explain the procedure for statistical analysis of wastewater flow rate data.

Draw a neat sketch of conventional water treatment plant and explain the function of each unit

Give the detail classification of Screens with their opening size.

Why are screens necessary before the treatment of wastewater?

Explain the construction and working of a Rapid Sand Filter along with a neat sketch.

Explain the construction and working of a Slow Sand Filter along with a neat sketch

Write a note on “Operational difficulties of RSF”.

Write a short note on Mud-ball formation in Sand filter.

Draw neat sketches of Micro-filtration treatment for surface water.

Enlist and explain the disinfectants used for water treatment.

Enlist the factors affecting disinfection.

With the help of a neat sketch explain the concept of “Break point Chlorination.”

Write a short note on Aerated Grit Chamber.

Enlist and explain the factors affecting the process of chlorination.

Explain the jar test procedure for determining the optimum dose of chemical Coagulant. What is the relationship between pH, Alkalinity and the alum dose?

Enlist the assumptions for ideal sedimentation tank.

Explain the phenomenon of flocculation for water and waste-water treatment.

Write a short note on “Colloidal Stability”. What are the mechanisms of Destabilization of colloids?

Enlist methods of dewatering and explain any one in detail.

Describe Newton’s law (Stokes law) for settling velocity of discrete particles.

Prepare a list of different chemical coagulants. Explain chemical reactions when alum is used as coagulants.

Discuss the objectives of treatment of sludge.

Explain Sludge Drying bed and its design criteria.

Describe the methods normally used to process the sludge before its final disposal.