Physico-chemical Treatment Technology — Winter 2023

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

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

Explain with neat sketch: dissolved air flotation for surface water treatment.

Give the classification of screen with opening size.

Write a note on “Operational difficulties of RSF”.

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

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

Write a short note on vortex type Grit Chamber.

Derive the Newton’s law for settling velocity of discrete particle.

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

Write a note on tube settlers highlighting its benefits and limitations.

Write a short note on grit removal mechanism.

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

Explain the concept of “Break point Chlorination”.

Enlist the assumptions for ideal sedimentation tank.

Enlist the different types of mixing equipments & explain any one with sketch.

Write a short note on ‘Filter backwashing’.

Enlist and explain different types of settling phenomena observed in sedimentation tank.

Differentiate between: (1) rapid mixture & flocculator (2) coagulation & flocculation.1

Explain Sludge Drying bed and its design criteria.

What are the advantages of dual media filters as compared to single media filters?

Describe the usual sources of sludge and the characteristics of sludge generated in a conventional wastewater treatment plant.

Why sludge treatment is required? Explain sludge thickening.

Explain anaerobic sludge digestion in detail.

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