Question

activated sludge: is the microbial activity the breaks down organic waste in a wastewater treatment system. is the removal of large, solid debris coming into the wastewater treatment system. is the disinfection of the effluent water source via chlorination and/or uv treatment in wastewater treatment system. is the primary step of wastewater treatment. two of the above is correct

Explanation:

Activated sludge uses microbial activity to break - down organic waste in wastewater. The primary step of wastewater treatment is usually the removal of large, solid debris. Disinfection via chlorination and/or UV treatment is a later step to purify the effluent water source.

Answer:

The microbial activity the breaks down organic waste in a wastewater treatment system.