Effective Treatment of Wastewater/sewage is Reflected in A(n)

Question

Effective treatment of wastewater/sewage is reflected in a(n)
A) lower BOD.
B) higher BOD.
C) unchanging BOD.
D) increase in sulfur.
E) decrease in biomass.

Accepted Answer

Lower BOD (Biochemical Oxygen Demand) indicates effective treatment of wastewater/sewage. BOD is a measure of the amount of dissolved oxygen that is required by aerobic biological organisms to break down the organic substances in the water. Higher BOD indicates a higher concentration of organic matter, indicating poor treatment or untreated sewage. The decrease in BOD indicates that the wastewater/sewage is being broken down effectively, reducing pollution and improving the overall water quality.