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Author Spanjers, H. ♦ Keesman, K.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1994
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Other branches of engineering
Subject Keyword Water resources ♦ Time series ♦ Parameter estimation
Abstract For good control of activated sludge plants information on the degradation kinetics of readily biodegradable matter (RBM) is necessary, because RBM greatly affects the oxygen consumption of the activated sludge. The concentration of RBM can be expressed by the short-term biochemical oxygen demand (BOD/sub st/). In this paper batch experiments are used in which samples of wastewater and activated sludge are mixed in a lab scale aeration tank while the respiration rate is monitored until all the RBM is oxidized. Since BOD/sub st/ is simply the integral of the respiration rates at successive time instants, BOD/sub st/ is calculated from time series of respiration rates. In this way kinetic models can be obtained from dynamic measurement of respiration rate only. The aim of this paper is to provide and analyse the conditions under which the equivalence of the relationship between BOD/sub st/ and respiration rate obtained from chemostat or batch experiments holds. Furthermore, the problem of obtaining an appropriate model structure with associated model parameters from given respiration rate data is investigated and evaluated for this type of biological systems. Four different classes of kinetic models are identified from several batch experiments. The data sets consist of only respiration rate as a function of time. It is concluded that batch respirometric experiments can be employed for kinetic model identification if sludge concentration and initial substrate concentration are carefully chosen. The occurrence of slowly degradable components hinders the identification of degradation kinetics of the dominant component.<<ETX>>
Description Author affiliation: Dept. of Environ. Technol, Wageningen Agric. Univ., Netherlands (Spanjers, H.)
ISBN 0780318722
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1994-08-24
Publisher Place United Kingdom
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 476.04 kB
Page Count 6
Starting Page 1011
Ending Page 1016


Source: IEEE Xplore Digital Library