Energy and Environmental Engineering

Korean Journal of Chemical Engineering

, Volume 25, Issue 6, pp 1338-1343

First online:

Design considerations and economics of different shaped surface aeration tanks

  • Achanta Ramakrishna RaoAffiliated withCivil Engineering Department, Indian Institute of Science
  • , Bimlesh KumarAffiliated withCivil Engineering Department, Indian Institute of Science Email author 

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This paper deals with the design considerations of surface aeration tanks on two basic issues of oxygen transfer coefficient and power requirements for the surface aeration system. Earlier developed simulation equations for simulating the oxygen transfer coefficient with theoretical power per unit volume have been verified by conducting experiments in geometrically similar but differently shaped and sized square tanks, rectangular tanks of length to width ratio (L/W) of 1.5 and 2 as well as circular tanks. Based on the experimental investigations, new simulation criteria to simulate actual power per unit volume have been proposed. Based on such design considerations, it has been demonstrated that it is economical (in terms of energy saving) to use smaller tanks rather than using a bigger tank to aerate the same volume of water for any shape of tanks. Among the various shapes studied, it has been found that circular tanks are more energy efficient than any other shape.

Key words

Aeration Oxygen Transfer Power Per Unit Volume Parameter Surface Aerators Water and Wastewater Treatment