Wastewater treatment lagoon systems play a large role in cleaning up water, using nature’s own processes. The three lagoon types pictured are aerobic, anaerobic, and facultative.
Aerobic Lagoon systems are oxygen-rich, supporting bacteria that break down waste in the presence of oxygen.
Anaerobic lagoons do their work without oxygen. They’re used for heavier, more concentrated waste and rely on bacteria that thrive in oxygen-free environments.
Facultative Lagoons’ top layer is oxygen-rich, while the bottom is oxygen-deprived. This combination allows both aerobic and anaerobic bacteria to work together.