Question

Many industries have wastewater treatment facilities that pretreat wastes before they discharge it to the sanitary sewers. The treatment system consists of several processes which includes all of the following except:

a) Primary (physical) treatment
b) Secondary (biological) treatment
c) Tertiary (chemical or biological) treatment
d) Quaternary (biological or chemical) treatment

Answer 1

The treatment system used in wastewater treatment plants consists of primary, secondary, and tertiary treatments to remove organic matter, kill bacteria, and remove pollutants. Quaternary treatment is not included. The options (A), (B), and (C) are correct.

Step-by-step explanation:

The treatment system used in wastewater treatment plants consists of several processes, including primary (physical) treatment, secondary (biological) treatment, and tertiary (chemical or biological) treatment.

The purpose of these treatments is to remove organic matter, kill bacteria, and remove nutrients and other pollutants. However, quaternary (biological or chemical) treatment is not typically included in the wastewater treatment process. Therefore, options (A), (B), and (C) are correct.