Which of the Following Play Some Role in Sewage Treatment

Question

Which of the following play some role in sewage treatment?
A)activated sludge
B)trickling filter
C)septic tank
D)lagooning
E)All of the choices are correct.

Accepted Answer

All of the options play a role in sewage treatment. Activated sludge is a biological treatment process that uses microorganisms to break down and remove organic materials from wastewater. Trickling filters involve passing wastewater through a bed of rocks or other medium, where microorganisms attach to the material and break down dissolved organic matter. Septic tanks are underground tanks that settle solids and decompose organic matter in wastewater before discharging it to a drain field. Lagooning involves storing wastewater in shallow ponds, allowing natural bacterial and chemical processes to remove pollutants.