At a wastewater treatment plant,the primary purpose of secondary treatment is to __________ .
A)remove the large solids
B)remove toxic chemicals such as pesticides and heavy metals
C)remove the organic matter remaining in the wastewater
D)remove bacteria and other pathogenic organisms

Question

Quizplus · Accepted Answer

Secondary treatment is designed to remove the remaining organic matter from the wastewater. This is typically done through biological processes such as activated sludge or trickling filters. While secondary treatment may also remove some bacteria and other pathogens, its primary purpose is not to do so, as this is typically handled by earlier stages of the treatment process. Removing large solids, toxic chemicals, and other contaminants is typically the responsibility of pre-treatment processes or tertiary treatment processes.

At a Wastewater Treatment Plant,the Primary Purpose of Secondary Treatment