Which one of the following processes in sewage treatment requires bacterial metabolism?
A)chlorination
B)primary treatment
C)removal of BOD
D)sedimentation
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

BOD (biochemical oxygen demand) is a measure of the amount of oxygen required by microbes to break down organic matter in sewage. This process is performed by bacteria during the secondary treatment phase of sewage treatment. Chlorination and sedimentation are physical processes, while primary treatment involves the removal of solid waste through mechanical means.

Which One of the Following Processes in Sewage Treatment Requires