Chlorination and Sewage Treatment Concepts

The video explains the biological sewage treatment process, which involves four compartments: primary, aeration, settlement, and chlorination. Raw sewage is processed through these compartments, where it is broken down by bacteria in the aeration compartment and settled in the settlement compartment. The clear effluent is then disinfected in the chlorination compartment. Automation is achieved using high and low-level floats to control the discharge pump.

What is the initial step in the biological sewage treatment process?

• Aeration

• Chlorination

• Bar screening

• Settlement

Which compartment contains bacteria that require oxygen and nutrients?

• Primary compartment

• Settlement compartment

• Chlorination compartment

• Aeration compartment

What happens to the activated sludge in the settlement compartment?

• It is chlorinated

• It is used as fertilizer

• It is recycled to the aeration compartment

• It is disposed of

What is the purpose of the chlorination compartment?

• To recycle the sludge

• To aerate the sewage

• To settle the sludge

• To disinfect the clear effluent

How is the effluent level in the chlorination tank managed?

• By adding more sewage

• By increasing the aeration

• Automatically by high and low-level floats

• Manually by an operator

What chemical is used for disinfection in the chlorination compartment?

• Calcium carbonate

• Sodium hypochlorite

• Sodium chloride

• Potassium permanganate