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RECORD NUMBER: 48 OF 527

OLS Field Name OLS Field Data
Main Title Biological Aerated Filter Evaluation (Journal Version).
Author Stensel, H. D. ; Brenner, R. C. ; Lee, K. M. ; Melcer, H. ; Rakness, K. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Washington Univ., Seattle. Dept. of Civil Engineering. ;Cincinnati Univ., OH. ;Environmental Protection Service, Burlington (Ontario). Waste Water Technology Centre. ;Process Applications, Inc., Fort Collins, CO.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/183;
Stock Number PB89-120000
Additional Subjects Wastewater ; Water treatment ; Biochemical oxygen demand ; Filtration ; Activated sludge process ; Aeration tanks ; Beneficiation ; Nitrification ; Chemical analysis ; Mathematical models ; Civil engineering ;
Holdings
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Status
NTIS  PB89-120000 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/14/1989
Collation 18p
Abstract
The paper presents the results of a 2-year evaluation of a two-cell, full-size biological aerated filter wastewater treatment unit with nominal flow capacity of 1,893 cu m/day (0.5 mgd). One cell was operated at a lower loading to accomplish combined biochemical oxygen demand (BOD) removal and nitrification, while the other cell was operated at a higher loading to achieve only BOD removal. The media size was found to be a critical design parameter for the system, and was increased in each cell during the course of the study to allow 24-hour or longer run times before headloss levels required backwashing. The effluent BOD and suspended solids concentrations were related to the soluble BOD volumetric loading and reactor temperature. At relatively low organic and ammonium nitrogen loadings, up to 88% nitrification was achieved. Oxygen utilization efficiencies ranged from 5.0-7.7% for acceptable air application rates. Equations were developed to predict oxygen consumption and sludge production as a function of influent soluble BOD and influent suspended solids-to-total BOD ratios. The oxygen consumption was lower and sludge production higher than typically experienced with conventional activated sludge treatment. (Copyright (c) ASCE 1988.)