Brown and Caldwell Home Page
Technical Papers RECENT PAPERS    ALL PAPERS      LOG IN

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      


Trickling Filter/Solids Contact Process Married to Lagoons--A Unique Process Combination at Everett, Washington
Author: Bill Persich, M. Steve Merrill, Stuart Oppenheim, Tom Thetford
Date: 6/105
Presented at the Water Pollution Control Federation Annual Conference, Dallas, Texas, 1988

The City of Everett, Washington, located in Snohomish County, presently treats wastewater for a community of approximately 77,000 people. Maximum winter month raw sewage flow for the year 2005 design condition is projected to be 25.5 MGD. The City's wastewater treatment plant consists of a headworks facility (screening and grit removal) followed by a two-cell, partially mixed aerated lagoon and two oxidation ponds operating in series. Effluent from the final pond is chlorinated prior to discharge to the Snohomish River.