Question

question 14 of 20
in many cities, wastewater travels through sewer lines to be processed at a wastewater - treatment plant. the treatment plant uses many methods to break down materials in wastewater and make sure materials are safe before release. which of the methods used during treatment is meant to promote the growth of bacteria so they can break down materials in wastewater?
a. aeration of liquid waste
b. burying of solid waste
c. heating of liquid waste
d. settling out of solid waste

Explanation:

Aeration supplies oxygen to wastewater. Many bacteria that break - down materials in wastewater are aerobic, meaning they need oxygen to grow and function effectively. Burying solid waste, heating liquid waste, and settling out solid waste do not directly promote bacterial growth for breaking down wastewater materials.

Answer:

A. Aeration of liquid waste