4.5 External Nutrient Dosing

What is the role of external nutrient dosing in biological wastewater treatment processes?

• Promoting algae growth

• Providing essential nutrients for microorganisms

• Preventing foam formation

• Enhancing sedimentation

Which of the following is NOT a benefit of external nutrient dosing?

• Improved denitrification

• Enhanced phosphorus precipitation

• Reduced dissolved oxygen levels

• Better floc formation

Which nutrient is typically dosed to stimulate the growth of denitrifying bacteria in wastewater treatment?

• Nitrogen

• Phosphorus

• Carbon

• Sulfur

What is the purpose of dosing trace elements in wastewater treatment?

• Enhancing odor control

• Promoting biological activity

• Preventing corrosion

• Increasing alkalinity

Which type of microorganisms benefit the most from external carbon dosing?

• Aerobic bacteria

• Denitrifying bacteria

• Phosphorus-accumulating bacteria

• Anaerobic bacteria

What is the main objective of dosing phosphorus in wastewater treatment?

• Promoting algae growth

• Enhancing biological phosphorus removal

• Increasing dissolved oxygen levels

• Reducing pH levels

External nutrient dosing helps in preventing which of the following issues in wastewater treatment?

• Nitrification inhibition

• Bulking sludge

• pH stabilization

• Ammonia volatilization

Which nutrient is essential for the formation of ATP molecules in microbial cells during wastewater treatment?

• Nitrogen

• Phosphorus

• Carbon

• Sulfur

What is the primary source of carbon in wastewater treatment systems?

• Organic matter

• Carbon dioxide gas

• Inorganic salts

• Nitrogen compounds

Which of the following is a consequence of excessive nitrogen in wastewater?

• Reduced oxygen demand

• Algae blooms

• Enhanced denitrification

• Improved settling characteristics