Clarification is the final step in wastewater treatment. Once the water has been thoroughly cleansed, clarifiers remove both any remaining pollutants and the chemicals added by the treatment process (such as chlorine), so water can be safely released back into the local environment. This manual discusses water clarification.
Founded in 1928, the Water Environment Federation (WEF) is a not-for-profit technical and educational organization with members from varied disciplines who work toward the WEF vision of preservation and enhancement of the global water environment. The WEF network includes water quality professionals from 76 Member Associations in 30 countries. Its headquaarters is in Alexandria, Virginia.