Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Design considerations and economics of different shaped surface aeration tanks

  • Rao, Achanta Ramakrishna (Civil Engineering Department, Indian Institute of Science) ;
  • Kumar, Bimlesh (Civil Engineering Department, Indian Institute of Science)
  • Published : 20081100
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Abstract

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.

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References

  1. W. S. Hu, J. Meier and D. I. C. Wang, Biotechnol. Bioeng., 27, 122 (1986)
  2. J.A. Gilbertson, A. Sen, L.A. Behie and M.K. Kallos, Biotechnol. Bioeng., 94, 783 (2006) https://doi.org/10.1002/bit.20900
  3. A. R. K. Rao, J. Environ. Engg., 125, 215 (1999) https://doi.org/10.1061/(ASCE)0733-9372(1999)125:3(215)
  4. K. Saravanan and J.B. Joshi, Can. J. Chem. Eng., 74, 16 (1996) https://doi.org/10.1002/cjce.5450740104
  5. A. R.K. Rao, B.V. B. Laxmi and K. S. Narasiah, Water Qual. Res. J. Canada, 39, 273 (2004)
  6. A. R. K. Rao, B. Kumar and A. K. Patel, Water Qual. Res. J. Canada, 42, 26 (2007) https://doi.org/10.2166/wqrj.2007.005
  7. R. L. King, R. A. Hiller and G. B. Tatterson, AIChE J., 34, 506 (1988) https://doi.org/10.1002/aic.690340320
  8. A.W. Nienow and J. J. Ulbrecht, Mixing of liquids by mechanical agitation, Gordon and Breach Sci. Publications, New York (1985)
  9. S. L. Udaya, K.V.N. S. Sharma and A.R.K. Rao, Proc. Symp. on Environmental Hydraulics, University of Honkong, 1577 (1991)
  10. J.R. McWhirter, J. Chern and J.C. Hutter, Ind. Eng. Chem. Res., 34, 2644 (1995) https://doi.org/10.1021/ie00047a013
  11. V. Mahendraker, D. S. Mavinic and J.K. Hall, J. Environ. Engg., 131, 692 (2005) https://doi.org/10.1061/(ASCE)0733-9372(2005)131:5(692)
  12. B. Deng and C. N. Kim, Korean J. Chem. Eng., 20, 685 (2003) https://doi.org/10.1007/BF02706908
  13. I. Y. Kim and S. D. Kim, Korean J. Chem. Eng., 7, 47 (1990) https://doi.org/10.1007/BF02697341
  14. W.K. Lewis and W.G. Whitman, Ind. Eng. Chem., 16, 1215 (1924) https://doi.org/10.1021/ie50180a002
  15. R.B. Banks, L. R. Sally and C. Polprasert, J. Environ. Engg., 109, 232 (1983) https://doi.org/10.1061/(ASCE)0733-9372(1983)109:4(983)
  16. C. J. Tzeng, R. Iranpour and M.K. Stenstrom, J. Environ. Engrg., 129, 402 (2003) https://doi.org/10.1061/(ASCE)0733-9372(2003)129:5(402)
  17. WEF and ASCE Manual of practice for water pollution control, Aeration a waste water treatment process, Water Environment Federation, Alexandria, Va., and ASCE, New York (1988).
  18. Metcalf & Eddy, Waste water engineering: Treatment disposal and reuse, Tata McGraw-Hill, New Delhi (2004)
  19. Standard methods for the examination of water and wastewater, 16th Edition, American Public Health Association, AWWA, WCPA, Washington, D.C. (1985)
  20. P. J. Roeleveld and M. C.M. Van Loosdrecht, Water Sci. Technol., 45, 77 (2002)
  21. A.L. Cook and C. C. Carr, Elements of electrical engineering, Wiley, New York (1947)
  22. P.C. Krause, O. Wasynczuk and S.D. Sudhoff, Analysis of electric machinery and drive systems, Wiley-IEEE Press (2002)
  23. J. L. Vasel, Contribution a l'etude des transferts d'oxygène en gestion des eaux, Ph.D. thesis, Fondation Universitaire Luxemourgeoise, Luxembourg, Arlon (1988)
  24. H. J. Hwang and M. K. Stenstrom, J. WPCF, 57, 12 (1985)
  25. G.M. Wesner, L. J. Ewing, T. S. Lineck and D. J. Hinrichs, Energy conservation in municipal wastewater treatment, EPA-430/9-77-01 1, NTIS No. PB81-165391, U.S. EPA Report, Washington, DC (1977)
  26. G.H. Vogel, Process development: From the initial idea to the chemical production plant, Wiley-VCH, Weinheim (2006)