Waste Stabilization Pond System (optimal)

This is an example of an optimal waste stabilization pond system, consisting of a 5-day, 3-m deep anaerobic pond, a 15-day, 1.5-m deep facultative pond, and a 20-day, 1-m deep maturation pond, with treatment of sludge from the anaerobic pond using a drying bed with 180 days of storage.