THE RESPIROMETRIC DETERMINATION OF NITRIFICATION KINETICS AND THE IMPLICATION FOR MODELING AND THE DESIGN OF ACTIVATED SLUDGE PROCESSES
Authors: Shaw, Andrew R.; Barnard, James L.
Source: Proceedings of the Water Environment Federation, WEFTEC 2002: Session 31 through Session 40 , pp. 803-808(6)
Publisher: Water Environment Federation
Abstract:More stringent controls on effluent nitrogen discharges are forcing plant design to achieve better nitrification with smaller plants. The kinetics of nitrification are essential to understanding and designing better plants for this purpose. Site-specific kinetics are required to produce better models.
This paper presents a new technique for determining nitrification kinetics using information from an online respirometer, coupled with a dynamic computer model of an activated sludge plant. The model produced using this technique gave a good correlation with data from an online ammonia monitor.
The results of this work highlight the need for a better understanding of death rate kinetics and the impact this parameter has on the achieved level of nitrification. The default death rate coefficient usually used in most models is 0.04d−1. The results of this paper and other studies indicate that this value is too low and should be at least 0.1d−1.
Document Type: Research Article
Publication date: 2002
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