Oxygen transfer in circular surface aeration tanks

Rao, Achanta Ramakrishna and Patel, Ajey Kumar and Kumar, Bimlesh (2009) Oxygen transfer in circular surface aeration tanks. In: Environmental Technology, 30 (7). pp. 747-753.

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Abstract

Surface aeration systems employed in activated sludge plants are the most energy-intensive units of the plants and typically account for a higher percentage of the treatment facility's total energy use. The geometry of the aeration tank imparts a major effect on the system efficiency. It is said that at optimal geometric onditions, systems exhibits the maximum efficiency. Thus the quantification of the optimal geometric conditions in surface aeration tanks is needed. Optimal geometric conditions are also needed to scale up the laboratory result to the field installation. In the present work, experimental studies have been carried out on baffled and unbaffled circular surface aeration tanks to ascertain the optimal geometric conditions. It is found that no optimal geometric conditions exist for the liquid/water depth in circular surface aeration tanks; however, for design purposes, a standard value has been assumed. Based on the optimal geometric conditions, a scale-up equation has been developed for the baffled circular surface aeration tanks.

Item Type:	Journal Article
Publication:	Environmental Technology
Publisher:	T.H. Huxley School of Environment
Additional Information:	Copyright of this article belongs to T.H. Huxley School of Environment.
Keywords:	aeration; oxygen transfer; surface aerators; theoretical power per unit volume parameter; water and wastewater treatment
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	13 Dec 2009 08:22
Last Modified:	19 Sep 2010 05:35
URI:	http://eprints.iisc.ac.in/id/eprint/21006

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