This special edition of the Environmental Engineer and Scientist is devoted to the 100-year anniversary of the Activated Sludge process. As we commemorate this significant milestone in wastewater treatment, we pause to reflect on the great contributions of the early pioneers and many who have contributed to the development and enhancement of the process over the years.
This special issue features:
100th Anniversary of the Activated Sludge Process: Introduction by Brian Flynn, P.E., BCEE
Who Invented Activated Sludge? by Daniel W. Schneider
Experiments on the Oxidation of Sewage Without the Aid of Filters by Edward Ardern, M.Sc., and William T. Lockett, M.Sc.
The Sludge Age Concept and the Activated Sludge Process: A 45 Year Retrospective Commentary by Alonzo W. Lawrence, Ph.D., P.E., BCEE, and Andrew C. Middleton, Ph.D., P.Eng., BCEE
Complete Mixing Activated Sludge by Ross E. McKinney
Solids Separation in the Activated Sludge Process - the First 100 Years by Richard I. Dick, Ph.D., P.E., BCEE
Designing Activated Sludge Systems for Nitrogen Removal by Glen T. Daigger, Ph.D., P.E., BCEE, NAE
Phosphorus Removal in the Activated Sludge Process by James L. Barnard, Ph.D., BCEE, WEF Fellow, IWA Senior Fellow, Dist. MASCE
The Future of Activated Sludge by George Tchobanoglous, Ph.D., P.E., BCEE, NAE, and
H. David Stensel, Ph.D., P.E., BCEE
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