Konzentrationsprofile in Rotationsscheibenreaktoren und deren Modellierung am Beispiel des anaeroben Acetatabbaus mit experimenteller Überprüfung

Autor: U. Wiesmann, T. Breithaupt
Rok vydání: 1998
Předmět:
Zdroj: Acta hydrochimica et hydrobiologica. 26:288-295
ISSN: 1521-401X
0323-4320
DOI: 10.1002/(sici)1521-401x(199809)26:5<288::aid-aheh288>3.0.co;2-x
Popis: This paper presents rotating disc reactors for aerobic and anaerobic wastewater treatment. Unlike the activated sludge or contact processes, this reactor allows higher concentrations of biomass and lesser danger of the reactor becoming blocked. The reduced backmixing within the reactor leads to axial concentration profiles when continuously operated. These are presented for various biological processes. The axial concentration profiles generated during the continuous anaerobic degradation of acetic acid are measured and described by a mathematical model. A refined dispersion model is created on the basis of tracer experiments taking into account the actual construction of the reactor as well as the physical conditions in it. To determine the biodegradation a Haldane kinetics is used, in which the undissociated acetic acid is the substrate. The model takes into consideration all the local parameters (pH value, concentration of acetic acid, biomass, and ion activity). The difficult measurement of the concentration of the active biomass which is immobilized on the disk is accomplished by carrying out batch experiments. The results of the experiments are 22 concentration profiles with influent DOC concentrations from 200 to 2 000 mg L -1 which were measured and modelled. Some examples are shown to illustrate the influence of the ion activity and the refinement of the dispersion model.
Databáze: OpenAIRE
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