Sewage Treatment Process and Concepts

The video explains the process of water use and sewage treatment by Unity Water. It highlights the urban water cycle, the importance of treating sewage to protect health and the environment, and the detailed steps involved in the sewage treatment process. The video emphasizes the role of bacteria in breaking down waste and the final steps of filtering and disinfecting treated water.

What percentage of sewage is primarily composed of dirty water?

• 95%

• 85%

• 90%

• 99%

What is the main reason for the urban water cycle's existence?

• To assist Mother Nature in treating polluted water

• To reduce water consumption

• To increase water usage

• To create new water

What happens to sewage when it first arrives at the treatment plant?

• It is mixed with clean water

• It is sent to the ocean

• It is screened to remove unwanted objects

• It is immediately disinfected

What role do bacteria play in the sewage treatment process?

• They add nutrients to the sewage

• They consume organic matter and reduce harmful nutrients

• They filter the water

• They disinfect the sewage

What is the term used for the solids separated from sewage?

• Residue

• Sediment

• Sludge

• Effluent

What is the main purpose of the clarifiers in the sewage treatment process?

• To add nutrients to the water

• To add oxygen to the water

• To separate solids from the water

• To disinfect the water

What happens to the biosolids after they are separated from the sewage?

• They are disposed of in landfills

• They are used to fertilize crops

• They are returned to the sewage system

• They are burned

How is the treated sewage disinfected to ensure it is ultra clean?

• By adding chemicals

• By freezing

• Using ultraviolet rays or chlorine

• By boiling

What is the final product of the sewage treatment process called?

• Effluent

• Sludge

• Biosolids

• Raw sewage

How often is the treated sewage tested for quality compared to bottled water?

• Less often

• More often

• The same amount

• Not tested