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The use of circular surface aerators in wastewater treatment tanks

Rao, Achanta Ramakrishna and Kumar, Bimlesh (2006) The use of circular surface aerators in wastewater treatment tanks. In: Journal of Chemical Technology and Biotechnology, 82 (1). pp. 101-107.


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Aeration experiments were conducted in different sized baffled and unbaffled circular surface aeration tanks to study their relative performance on oxygen transfer process while aerating the same volume of water. Experiments were carried out with the objective of ascertaining the effect of baffle on oxygen transfer coefficient k. Simulation equations govern the oxygen transfer coefficient with the theoretical power per unit volume, X and actual power per unit volume, $P_v$. It has been found that, for any given X, circular tanks with baffle produce higher values of k than unbaffled circular tanks, but in terms of actual power consumption unbaffled tanks consume less power when compared to baffled circular tanks to achieve the same value of k. It has been found that in terms of energy consumption, , baffled tanks consume more energy than unbaffled tanks at any value of X. This suggests that the unbaffled circular tank gives a better performance as far as energy consumption is concerned and hence better economy. An example illustrating the energy conservation to aerate the same volume of water in both types of aerators is given.

Item Type: Journal Article
Publication: Journal of Chemical Technology and Biotechnology
Publisher: Society of Chemical Industry
Additional Information: Copyright of this article belongs to Society of Chemical Industry.
Keywords: Circular surface aerator;Energy consumption;Oxygen transfer coefficient;Power per unit volume parameter
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 25 Aug 2008
Last Modified: 19 Sep 2010 04:33
URI: http://eprints.iisc.ac.in/id/eprint/9158

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