Substrate Utilization Approach for Design of Nitrogen Control
Publication: Journal of Environmental Engineering
Volume 110, Issue 2
Abstract
A combined nitrification/denitrification (N/D) system was investigated as a method for redudng the waste load of tannery waste to proposed EPA levels. Present design criteria for nitrate reduction are inadequate not only for the system under study but for a spectrum of interesting process variations. A biokinetic approach to deal with this shortcoming was developed. The anoxic zone of the combined N/D system is viewed as a plug flow reactor with internal recycle; and substrate utilization kinetics of this reactor are examined by use of a batch biokinetic device. Oxygen and nitrate utilization were found to be stoichiometrically related and a function of the ratio of incoming COD (chemical oxygen demand) to sludge mass. Using the method developed, oxygen utilization was found to be an excellent measure of nitrate reduction kinetics.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 110 • Issue 2 • April 1984
Pages: 369 - 380
Copyright
Copyright © 1984 ASCE.
History
Published online: Apr 1, 1984
Published in print: Apr 1984
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