Design considerations and economics of different shaped surface aeration tanks

Achanta Ramakrishna Rao; Bimlesh Kumar

Korean Journal of Chemical Engineering, Vol.25, No.6, 1338-1343, November, 2008

DOI10.1007/s11814-008-0219-7 Export Citation

Design considerations and economics of different shaped surface aeration tanks

Achanta Ramakrishna Rao, and Bimlesh Kumar^†

Civil Engineering Department, Indian Institute of Science, Bangalore, 560012, India

E-mail:

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.

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

[References]

Hu WS, Meier J, Wang DIC, Biotechnol. Bioeng., 27, 122 (1986)
Gilbertson JA, Sen A, Behie LA, Kallos MS, Biotechnol. Bioeng., 94(4), 783 (2006)
Rao ARK, J. Environ. Engg., 125, 215 (1999)
Saravanan K, Joshi JB, Can. J. Chem. Eng., 74(1), 16 (1996)
Rao ARK, Laxmi BVB, Narasiah KS, Water Qual. Res. J. Canada, 39, 273 (2007)
Rao ARK, Kumar B, Patel AK, Water Qual. Res. J. Canada, 42, 26 (2007)
King RL, Hiller RA, Tatterson GB, AIChE J., 34, 506 (1988)
Nienow AW, Ulbrecht JJ, Mixing of liquids by mechanical agitation, Gordon and Breach Sci. Publications, New York (1985)
Udaya SL, Sharma KVNS, Rao ARK, Proc. Symp. on Environmental Hydraulics, University of Honkong, 1577 (1991)
Mcwhirter JR, Chern JM, Hutter JC, Ind. Eng. Chem. Res., 34(8), 2644 (1995)
Mahendraker V, Mavinic DS, Hall JK, J. Environ. Engg., 131, 692 (2005)
Deng B, Kim CN, Korean J. Chem. Eng., 20(4), 685 (2003)
KIM IY, KIM SD, Korean J. Chem. Eng., 7(1), 47 (1990)
Lewis WK, Whitman WG, Ind. Eng. Chem., 16, 1215 (1924)
Banks RB, Sally LR, Polprasert C, J. Environ. Engg., 109, 232 (1983)
Tzeng CJ, Iranpour R, Stenstrom MK, J. Environ. Engrg., 129, 402 (2003)
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)
Metcalf & Eddy, Waste water engineering: Treatment disposal and reuse, Tata McGraw-Hill, New Delhi (2004)
Standard methods for the examination of water and wastewater, 16th Edition, American Public Health Association, AWWA, WCPA, Washington, D.C. (1985)
Roeleveld PJ, Van Loosdrecht MCM, Water Sci. Technol., 45, 77 (2002)
Cook AL, Carr CC, Elements of electrical engineering, Wiley, New York (1947)
Krause PC, Wasynczuk O, Sudhoff SD, Analysis of electric machinery and drive systems, Wiley-IEEE Press (2002)
Vasel JL, Contribution a l’etude des transferts d'oxygene en gestion des eaux, Ph.D. thesis, Fondation Universitaire Luxemourgeoise, Luxembourg, Arlon (1988)
Hwang HJ, Stenstrom MK, J. WPCF, 57, 12 (1985)
Wesner GM, Ewing LJ, Lineck TS, Hinrichs DJ, Energy conservation in municipal wastewater treatment, EPA-430/9-77-011, NTIS No. PB81-165391, U.S. EPA Report, Washington, DC (1977)
Vogel GH, Process development: From the initial idea to the chemical production plant, Wiley-VCH, Weinheim (2006)

[Referenced By]

[1] Hu WS, Meier J, Wang DIC, Biotechnol. Bioeng., 27, 122 (1986)

[2] Gilbertson JA, Sen A, Behie LA, Kallos MS, Biotechnol. Bioeng., 94(4), 783 (2006)

[3] Rao ARK, J. Environ. Engg., 125, 215 (1999)

[4] Saravanan K, Joshi JB, Can. J. Chem. Eng., 74(1), 16 (1996)

[5] Rao ARK, Laxmi BVB, Narasiah KS, Water Qual. Res. J. Canada, 39, 273 (2007)

[6] Rao ARK, Kumar B, Patel AK, Water Qual. Res. J. Canada, 42, 26 (2007)

[7] King RL, Hiller RA, Tatterson GB, AIChE J., 34, 506 (1988)

[8] Nienow AW, Ulbrecht JJ, Mixing of liquids by mechanical agitation, Gordon and Breach Sci. Publications, New York (1985)

[9] Udaya SL, Sharma KVNS, Rao ARK, Proc. Symp. on Environmental Hydraulics, University of Honkong, 1577 (1991)

[10] Mcwhirter JR, Chern JM, Hutter JC, Ind. Eng. Chem. Res., 34(8), 2644 (1995)

[11] Mahendraker V, Mavinic DS, Hall JK, J. Environ. Engg., 131, 692 (2005)

[12] Deng B, Kim CN, Korean J. Chem. Eng., 20(4), 685 (2003)

[13] KIM IY, KIM SD, Korean J. Chem. Eng., 7(1), 47 (1990)

[14] Lewis WK, Whitman WG, Ind. Eng. Chem., 16, 1215 (1924)

[15] Banks RB, Sally LR, Polprasert C, J. Environ. Engg., 109, 232 (1983)

[16] Tzeng CJ, Iranpour R, Stenstrom MK, J. Environ. Engrg., 129, 402 (2003)

[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] Roeleveld PJ, Van Loosdrecht MCM, Water Sci. Technol., 45, 77 (2002)

[21] Cook AL, Carr CC, Elements of electrical engineering, Wiley, New York (1947)

[22] Krause PC, Wasynczuk O, Sudhoff SD, Analysis of electric machinery and drive systems, Wiley-IEEE Press (2002)

[23] Vasel JL, Contribution a l’etude des transferts d'oxygene en gestion des eaux, Ph.D. thesis, Fondation Universitaire Luxemourgeoise, Luxembourg, Arlon (1988)

[24] Hwang HJ, Stenstrom MK, J. WPCF, 57, 12 (1985)

[25] Wesner GM, Ewing LJ, Lineck TS, Hinrichs DJ, Energy conservation in municipal wastewater treatment, EPA-430/9-77-011, NTIS No. PB81-165391, U.S. EPA Report, Washington, DC (1977)

[26] Vogel GH, Process development: From the initial idea to the chemical production plant, Wiley-VCH, Weinheim (2006)