What role do algae play in a sewage lagoon?

Algae play a crucial role in replenishing dissolved oxygen in the water within a sewage lagoon. During photosynthesis, algae absorb carbon dioxide and release oxygen into the water, which is essential for the survival of aerobic microorganisms that help in breaking down organic matter. This process not only aids in maintaining a healthy environment for aquatic life but also enhances the overall treatment of wastewater.

The presence of oxygen is vital in facilitating the digestion of organic pollutants by aerobic bacteria, thus improving water quality and promoting the effectiveness of the lagoon as a treatment system. The ability of algae to produce oxygen efficiently contributes significantly to the overall functioning and health of the sewage lagoon ecosystem.