Sewage

A downward pointing yellow arrow labeled "sewage" represents the excess nutrients and pollution from human waste systems that runoff into the watershed

A biodigestor processes organic waste into gas and fertilizer. It is a simple system to implement with inexpensive materials and is being introduced in isolated rural communities and developing countries to get the double benefit of getting solve energy and environmental problems, and perform proper management of both human waste and animal

3-D Illustration of a sewage treatment plant with pools

Another illustration of a wastewater treatment plant, with pools, buildings and a drainage pipe

Illustration of a primary sewage treatment plant

Illustration of a tertiary sewage treatment plant