Wastewater Treatment Alternate Assignment

What is the primary goal of wastewater treatment?

• To make wastewater suitable for industrial use.

• To turn wastewater back into water that can be consumed.

• To dispose of wastewater in a way that doesn't harm the environment.

• To separate solid waste from liquid waste.

What is the main function of bar screens in a wastewater treatment plant?

• To remove small particles like sand and grit.

• To introduce air into the wastewater.

• To prevent large items from damaging plant machinery.

• To chemically treat the wastewater.

What is the initial stage of wastewater treatment called, where larger items are removed?

• Primary treatment

• Secondary treatment

• Pretreatment

• Grit removal

Why are grit chambers used in wastewater treatment?

• To remove organic matter using biological processes.

• To settle out particles like sand and rock that could damage pumps.

• To disinfect the water using chemicals.

• To separate oil and grease from the wastewater.

What is the function of biofilters (or trickling filters) in older wastewater treatment plants?

• To separate solid waste from liquid effluent.

• To allow a film of bacteria to consume organic matter.

• To inject oxygen into the wastewater.

• To neutralize harmful chemicals.

What is the main objective of secondary clarifiers in the wastewater treatment process?

• To initiate the breakdown of organic matter using oxygen.

• To remove large debris and grit.

• To achieve the final removal of solids and biological matter.

• To introduce chlorine for disinfection.

Which of the following is NOT mentioned as a common method for disinfection in wastewater treatment?

• Chlorine

• Ozone

• Ultraviolet (UV) light

• Reverse Osmosis

How does ultraviolet (UV) disinfection treat wastewater?

• It chemically alters the water to kill bacteria.

• It causes microbial cell walls to leak and decompose.

• It scrambles bacteria's DNA, preventing them from multiplying.

• It physically filters out bacteria from the water.