Question

Physical removal of large and small particles from the sewage through filtration and sedimentation is called:

• A. Primary treatment
• B. Secondary treatment
• C. Tertiary treatment
• D. Quaternary treatment

Answer 1

The correct option is A

Primary treatment

Primary Treatment Wastewater is a plain sedimentation process to remove suspended organic solids from the sewage. Chemical are sometimes used to remove finely divided and colloidal solids.