Modelling respiration rate and nitrate removal in a nitrifying-denitrifying SBR treating domestic wastewater

This investigation aimed to present a mathematical model for the behaviour of respiration rate and nitrate removal in an activated sludge sequencing batch reactor (SBR) with nitrification, denitrification and carbon oxidation. This model is based on the response of respiration rate ( r) measured dur...

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Bibliographic Details
Published in:Bioresource technology 1999-02, Vol.67 (2), p.177-189
Main Authors: Bernardes, R.S., Spanjers, H., Klapwijk, A.
Format: Article
Language:English
Subjects:
Applied sciences
Biological and medical sciences
Biological treatment of waters
Biotechnology
Denitrification
Domestic wastewater
Environment and pollution
Environmental Technology
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
General purification processes
Industrial applications and implications. Economical aspects
Milieutechnologie
Modelling
Nitrification
Pollution
Respiration rate
Sectie Milieutechnologie
Sequencing batch reactor (SBR)
Sub-department of Environmental Technology
Wastewaters
Water treatment and pollution
WIMEK
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Summary:This investigation aimed to present a mathematical model for the behaviour of respiration rate and nitrate removal in an activated sludge sequencing batch reactor (SBR) with nitrification, denitrification and carbon oxidation. This model is based on the response of respiration rate ( r) measured during nitrification and carbon oxidation and the nitrate removal rate during the post-denitrification period. For model validation, an SBR pilot plant (1 m 3) receiving domestic wastewater was operated for three months, and the results were compared with the model. The respiration rate was used to calibrate several parameters of the model. The simulation values matched well with the measured respiration rate and nitrate removal. The model was able to predict respiration rate and denitrification in one cycle with parameters taken from the previous cycle. Parameter changes were followed during long-term operation, and significant variations were observed that were too complex to be predicted. It can be concluded that r is a good parameter for on-line monitoring of an activated sludge SBR with nitrification-denitrification processes.
ISSN:0960-8524
1873-2976
DOI:10.1016/S0960-8524(98)00091-1