2.3 Clarifier

What is the key feature of a Clarifier Tank that distinguishes it from a Sedimentation Tank?

• Faster flow rate

• Slower flow rate

• Smaller size

• Higher temperature

What is the primary difference between Sedimentation Tanks and Clarifier Tanks?

• Sedimentation Tanks are smaller

• Clarifier Tanks have a faster flow rate

• Clarifier Tanks have slower flow rate and mechanisms for scraping settled solids

• Sedimentation Tanks remove dissolved contaminants

What is the primary difference between Sedimentation Tanks and Clarifier Tanks in terms of particle removal?

• Sedimentation Tanks remove smaller particles

• Clarifier Tanks remove smaller particles and have mechanisms for collecting settled solids

• Both remove the same size particles

• Neither removes particles

What is the purpose of the inclined plates or tubes in an inclined tube clarifier?

• Increase sedimentation area

• Enhance aeration

• Improve disinfection

• Reduce energy consumption

What is a key difference between primary and secondary clarifiers?

• Primary clarifiers use chemicals, while secondary clarifiers do not.

• Secondary clarifiers treat settled sludge, while primary clarifiers do not.

• Secondary clarifiers use biological processes, while primary clarifiers do not.

• All correct

Which of the following is a characteristic feature of secondary clarifiers in activated sludge treatment?

• High turbulence

• Settled sludge recirculation

• Low oxygen concentration

• Short detention time

Which clarifier type is responsible for removing biological sludge in wastewater treatment plants?

• Primary Clarifier

• Secondary Clarifier

• Tertiary Clarifier

• Quaternary Clarifier

What is a common indication of short-circuiting in a clarifier?

• Excessive sludge blanket

• Uneven distribution of influent

• Irregular sludge removal

• Correct A and B

What does a high sludge blanket level in a clarifier indicate?

• Proper functioning

• Overflocculation

• Short-circuiting

• Insufficient sedimentation

Which parameter is critical for preventing excessive biological growth in a clarifier?

• Temperature

• pH

• Dissolved oxygen

• Nutrient concentration