Which of the Following Organisms Does NOT Play a Major

Question

Which of the following organisms does NOT play a major role in secondary wastewater treatment?
A) Zoogloea
B) Flavobacterium
C) Escherichia
D) Pseudomonas
E) Nocardia

Accepted Answer

Escherichia (commonly E. coli) is not typically involved in the secondary treatment of wastewater, which primarily relies on aerobic bacteria and other microorganisms to degrade organic matter. E. coli is more often a contaminant that wastewater treatment aims to remove.