Impeller Submergence Depth for Stirred Tanks

Thiyam T. Devi -  Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
Annu P. Sinha -  Agriculture Engineering, JNKVV, Jabalpur, India
Meena Thakre -  Agriculture Engineering, JNKVV, Jabalpur, India
*Bimlesh Kumar -  Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
Received: 4 Mar 2011; Published: 22 Nov 2011.
Open Access
Citation Format:
Article Info
Section: Original Research Articles
Language: EN
Full Text:
In 2011: BCREC Volume 6 Issue 2 Year 2011 (SCOPUS Indexed)
Statistics: 452 397
Abstract

Impeller submergence governs the performance of mixing tanks employed in oxygen transfer operation. Present work experimentally investigates the effect of impeller submergence depths on oxygen transfer and corresponding power consumption. It has been found that at higher range of impeller submergence, mixing tanks consume less power and gives higher values of oxygen transfer coefficient. Optimal range of submergence depth is 0.7 to 0.9 times the impeller diameter. Copyright ©2011 BCREC UNDIP. All rights reserved.

(Received: 4th March 2011; Revised: 12nd July 2011; Accepted: 14th July 2011)

[How to Cite: T.T. Devi, A.P. Sinha, M. Thakre, and B. Kumar. (2011). Impeller Submergence Depth for Stirred Tanks. Bulletin of Chemical Reaction Engineering & Catalysis, 6 (2): 123-128. doi:10.9767/bcrec.6.2.826.123-128]

[How to Link / DOI: http://dx.doi.org/10.9767/bcrec.6.2.826.123-128 || or local: http://ejournal.undip.ac.id/index.php/bcrec/article/view/826]

| View in 

Keywords
oxygen transfer; power consumption; rotational speed; submerged depth;stirred tanks; two-film theory

Article Metrics:

  1. Oldshue, J.Y. 1983. Fluid Mixing Technology. McGraw-Hill, New York.
  2. Ulbrecht, J.J., Patterson, G.K. 1985. Mixing of Liquids by Mechanical Agitation. Chemical Engineering Series: Concepts and Reviews, Volume 1, Gordon and Breach Science Publishers, London.
  3. Assirelli, M., Bujalski, W., Eaglesham, A., Nienow, A.W. 2002. Study of micromixing in a stirred tank using a Rushton turbine: comparison of feed position and other mixing devices. Trans. IChem. 80: 855–863.
  4. Ciofalo, M., Brucato, A., Grisafi, F., Torraca, N. 1996. Turbulent flow in closed and free-surface unbaffled tanks. Chem. Eng. Sci. 51: 3557-3573.
  5. Li, M., White, G., Wilkinson, D., Roberts, K.J. 2004. LDA measurements and CFD modeling of a stirred vessel with a retreat curve impeller. Ind. Eng. Chem. Res. 43: 6534–6547.
  6. Montante, G., Lee, K.C., Brucato, A., Yianneskis, M. 2001. Numerical simulations of the dependency of flow pattern on impeller clearance in stirred vessels. Chem. Eng. Sci. 56: 3751–3770.
  7. Nagata, S. 1975. Mixing Principles and applications. John Wiley & sons, New York.
  8. Nienow, A.W. 1998. Hydrodynamics of stirred bioreactors. Appl. Mech. Rev. 51: 1–32.
  9. Ognean, T. 1993. Dimensionless criteria for estimating oxygen transfer in aeration systems. Biotechnol. Bioeng. 41: 1014-1020.
  10. Patil, S.S., Deshmukh, N.A., Joshi, J.B. 2004. Mass transfer characteristics of surface aerators and gasinducing impellers. Ind. Eng. Chem. Res. 43: 2765-2774.
  11. Rushton, J.H. 1952. Applications of fluid mechanics and similitude to scale-up problems-part1. Chem. Eng. Prog. 48: 33-38.
  12. Kumar, B., Devi, T.T., Patel, A.K., Bhatla, A. 2010. Optimal Geometric Configuration for Power Consumption in Baffled Surface Aeration Tanks. Bull. Chem. React. Eng. Catal. 5 (2): 87 - 93. [linked fulltext BCREC ] [Fulltext via CrossRef]
  13. Zlokarnik, M. 1979. Scale-up of surface aerators for waste water treatment. Adv. Biochem. Eng. 11:157-180.
  14. Backhurst, J.R., Harker, J.H., Kaul, S.N. 1998. The performance of pilot and full-scale vertical shaft aerators. Water Res. 22: 1239-1243.
  15. Takase, H., Unno, H., Akehata, T. 1984. Oxygen transfer in a surface aeration tank with square cross section. Int. Chem. Eng. 21: 128-134.
  16. Hwang, H.J., Stenstrom, M.K. 1985. Evaluation of finebubble alpha factors in near-full scale equipment. J. Water Pollution Control Fed. 57 : 1142-1150.
  17. Vasel, J.L. 1988. Contribution á l’étude des transferts d'oxygène en gestion des eaux. Ph.D. Thesis, Fondation Universitaire Luxemourgeoise, Luxembourg, Arlon.
  18. Johnson, A.I., Huang, C. 1956. Mass transfer studies in an agitated vessel. AIChE J. 2: 412-419.
  19. Walas, S.M. 1980. Chemical Process Equipment - Selection and Design. Butterworth-Heinemann, Washington Street, Newton, MA, USA.
  20. King, R.L., Hiller, R.A., Tatterson, G.B. 1988. Power consumption in a mixer. AIChE J. 34: 506-509.
  21. Ascanio, G., Castro, B., Galindo, E. 2004. Measurement of power consumption in stirred vessels—a review. Chem. Eng. Res. Des. 82: 1282–290.
  22. Nienow, A.W., Ulbrecht, J.J. 1985. Mixing of Liquids by Mechanical Agitation. Eds. Ulbrecht, J.J. and Patterson, G.K., Gordon and Breach, New York, Chapter 6, 203-237.
  23. Lewis, W.K., Whitman, W.G. 1924. Principles of gas absorption. Ind. Eng. Chem. 16: 1215-1220.
  24. Brown, L.C., Baillod, C.R. 1982. Modeling and interpreting oxygen transfer data. J. Environ. Eng. 108: 607-628.
  25. Deshmukh, N.A., Joshi, J.B. 2006. Surface aerators: power number, mass transfer coefficient, gas hold up profiles and flow patterns. Chem. Eng. Res. Des. 84: 1–16.

Copyright Transfer Agreement

The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to Bulletin of Chemical Reaction Engineering & Catalysis journal and Department of Chemical Engineering Diponegoro University as publisher of the journal.

Copyright encompasses exclusive rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms and any other similar reproductions, as well as translations. The reproduction of any part of this journal, its storage in databases and its transmission by any form or media, such as: electronic, electrostatic and mechanical copies, photocopies, recordings, magnetic media, etc. , will be allowed only with a written permission from Bulletin of Chemical Reaction Engineering and Catalysis journal and Department of Chemical Engineering Diponegoro University.

Bulletin of Chemical Reaction Engineering & Catalysis journal and Department of Chemical Engineering Diponegoro University, the Editors and the Advisory International Editorial Board make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in the Bulletin of Chemical Reaction Engineering & Catalysis (BCREC) are sole and exclusive responsibility of their respective authors and advertisers.

The Copyright Transfer Agreement Form can be downloaded here: [Copyright Transfer Form BCREC 2016]
The copyright form should be signed originally and send to the Editorial Office in the form of original mail, scanned document or fax :

Assoc. Prof. Dr. I. Istadi (Editor-in-Chief)
Editorial Office of Bulletin of Chemical Reaction Engineering & Catalysis
Department of Chemical Engineering, Diponegoro University
Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang, Central Java, Indonesia 50275
Telp.: +62-24-7460058, Fax.: +62-24-76480675
E-mail: bcrec@live.undip.ac.id