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Effects of the aeration on the fluid dynamic behaviour of a multi-zone activated sludge system

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Ref CV 196 WIT Transc 2016.pdf (2.278Mb)
Identifiers
URI: http://hdl.handle.net/10317/8594
URL: https://www.witpress.com/elibr ...
ISSN: 1743-3541
DOI: 10.2495/WM160281
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Author
Sánchez Fernández, Francisco; Sánchez Kaiser, Antonio; Viedma Robles, Antonio; Gómez Fayrén, Antonio
Knowledge Area
Mecánica de Fluidos
Sponsors
The researcher team of the present work acknowledges the contribution of the company ESAMUR, owner of the biological reactor studied, which provided the experimental data necessary for the development of the numerical model presented.
Publication date
2016
Publisher
WITpress
Bibliographic Citation
Sánchez, F. & Kaiser, A. & Viedma, A. & Gómez, A. (2016). Effects of the aeration on the fluid dynamic behaviour of a multi-zone activated sludge system. En: WIT Transactions on Ecology and the Environment, vol. 202, pp 311-321.
Keywords
Air bubbles-water interaction
Activated sludge system
Wastewater treatment plant
Numerical modelling
Abstract
Conventional wastewater treatment plants (WWTP) are necessary to modify the wastewater properties in order to make it acceptable for a safe discharge into the environment or a certain reuse purpose. Biological oxidation is the most important of the processes involved in conventional WWTP. Organic substances dissolved in the water are removed by means of bacteria presented in the biological reactor. Air is necessary to enable the reduction of the organic content of the water by the bacteria. Bubbles of air are introduced into the reactor through air diffusers. Air diffusers can account up to 70% of WWTP total energy consumption. So a deep understanding of the dynamic behaviour of the flow is necessary for optimizing the process and saving energy. A numerical analysis of the effects of the aeration in the fluid dynamics behaviour of a real multi-zone activated sludge reactor is carried out. The purpose is to identify and analyse the changes originated in the velocity field by the aeration. ...
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