Efficiences of Advanced Waste Treatment Obtained with Upgraded Trickling Filters

by Dan P. Morris, (M.ASCE), Vice Pres.; Brown & Caldwell,
Eben L. Owens, Proc. Analyst; Wastewater Reclamation Plant, Corvallis, Ore.,
Marvin L. Daniels, Supt.; Wastewater Reclamation Plant, Corvallis, Ore.,
Denny S. Parker, (M.ASCE), Vice Pres.; Brown & Caldwell,

Serial Information: Civil Engineering—ASCE, 1980, Vol. 50, Issue 9, Pg. 78-81

Document Type: Feature article


Many or most cities and towns, and particularly the smaller ones, still use trickling filters in their wastewater treatment plants. The process is economical and reliable, but unfortunately BOD5 and suspended solids removal efficiency in many cases is not high enough to meet today's effluent quality requirements. But recent experience at Corvallis, Oregon, suggests that trickling filter plants can be upgraded, at relatively low cost to provide effluents of quality equal to advanced secondary treatment or even of advanced waste treatment (effluent BOD5 and SS less than 10 mg/l). Because of its relatively low cost and potential broad applicability, the innovation is thought to be very significant.

Subject Headings: Waste treatment | Effluents | Waste treatment plants | Filters | Wastewater treatment plants | Urban areas | Economic factors | Turbidity | Oregon | United States

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