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Activated sludge tanks are large, aerated tanks used in wastewater treatment plants to treat sewage. Microorganisms in the tank break down organic matter and remove pollutants from the water.
The process of adding air or oxygen to a substance, such as wastewater, to enhance biological processes.
Clarifier: A settling tank used to separate solids from liquids in wastewater treatment.
The solid material that settles at the bottom of wastewater during treatment.