Lagoon

Name:
Lagoon
Detailed information:
A scientifically constructed pond 3–5 ft deep in which sewage and other organic wastes are decomposed by the action of algae, sunlight, and oxygen, thus restoring water to a purity equal to that obtained with other types of treatment. These so-called oxidation ponds are often used following activated sludge treatment. The waste may be retained in the lagoon for as long as 30 days and is then chlorinated and passed through a trickle filter.