Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

Question

Quizplus · Accepted Answer

Secondary sewage treatment is responsible for the removal of most of the BOD in sewage. This process uses biological activity to break down organic material and remove contaminants. Tertiary sewage treatment is used for further purification, but it primarily focuses on removing nutrients and fine solids rather than BOD. Anaerobic sludge digestion is a process for treating sewage sludge, not wastewater. Water treatment processes focus on purifying drinking water, not wastewater. Primary sewage treatment removes larger solids and floating debris, but it does not significantly reduce BOD levels.

Which Wastewater Treatment Process Is Responsible for Removal of Most