Sewage Treatment

What is the first step in the water treatment process?

• coagulation

• filtration and removal of debris, sand, grit, etc.

• flocs

• concentation

What is the role of bacteria in the water purification process?

• digested organic matter
• add chlorine
• nothing, we don't want them in there
• add nutrients to the sludge

What gas must be maintained at precise levels in the aeration tank?

• CO₂
• O₂
• H₂
• CO

What is a sewage treatment plant?

• The place where water is cleaned, filtered and tested before re-entering the water cycle.

• The place where water is cleaned, filtered and tested before going to our houses.

• The network of pipes that carry sewage (dirty water) from our houses.

• The place where water is bottled for drinking.

The semi-solid organic material that comes out of a wastewater treatment plant after completion of the wastewater treatment process is called

• wastewater.

• pathogenic.

• sewage.

• sludge.

What is effluent?

• the suspended solids in the water

• the partially treated wastewater moving through the facility

• the solids that come out of the digesters

• water-borne diseases

What happens in the digesters?

• aerobic bacteria processes organic waste

• organic waste is turned into usable fertilizer

• anaerobic bacteria processes organic waste

• chlorine is added to disinfect biosolids

What is produced in the digesters?

• methane gas

• chlorine

• fertilizer

• effluent

Process used in water treatment process where water is pushed through screens, sand, gravel and coal to remove organisms and trash

• filtration

• chlorination

• coagulation

• bioreactors

After the clarification step in wastewater treatment, the solid waste called ______ is sold off and the liquid waste called _____ moves on the be filtered and disinfected

• sewage and dirty water

• sludge and effluent

• effluent and slude

• dirty water and sewage