Understanding Sewage Water Treatment

What is the primary purpose of biological treatment methods in sewage treatment?

• To remove large solid waste

• To break down organic matter using microorganisms

• To add chemicals to neutralise toxins

• To filter out heavy metals

Which of the following is a common chemical used in the chemical treatment process of sewage water?

• Chlorine

• Oxygen

• Nitrogen

• Helium

What is the main function of a sewage treatment plant?

• To produce drinking water

• To treat and clean wastewater before releasing it back into the environment

• To store rainwater

• To generate electricity

Which of the following is a benefit of wastewater recycling?

• Increases water pollution

• Reduces the need for fresh water resources

• Increases the cost of water treatment

• Decreases the availability of water for agriculture

What is the role of bacteria in the biological treatment of sewage water?

• To add nutrients to the water

• To break down organic pollutants

• To increase the water temperature

• To remove heavy metals

Which process is used to remove suspended solids from sewage water?

• Sedimentation

• Evaporation

• Distillation

• Filtration

What is the typical temperature range for biological treatment processes in sewage treatment plants?

• 0-10°C

• 15-35°C

• 50-70°C

• 80-100°C

Which of the following is a disadvantage of chemical treatment processes?

• They are very slow

• They can produce harmful by-products

• They require no energy

• They are ineffective at removing solids

What is the purpose of aeration in sewage treatment?

• To remove odours

• To provide oxygen for microorganisms

• To cool down the water

• To add nutrients

Which of the following is a method of wastewater recycling?

• Incineration

• Reverse osmosis

• Landfilling

• Combustion