What is activated sludge and how does it clean the wastewater?
“Activated sludge” is a mass of microorganisms that digest organic material in wastewater. The microorganisms clean the wastewater by digesting organic materials and other contaminants. Wastewater remains in aeration basins for about three hours to allow time for the microorganisms to grow and consume the bacteria.

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1. Is it okay to flush wet wipes and other products labeled "flushable"?
2. Is it okay to flush old medications?
3. How does grease clog the sewer system?
4. How is wastewater treated?
5. What is activated sludge and how does it clean the wastewater?