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Minimization of Excess Sludge Production for Biological Waste Water Treatment using Activated Sludge Process

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Author Affiliations

  • 1Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur, MS, INDIA
  • 2Department of Chemical Engineering, Pravara Rural Engineering College, Loni, Ahmednagar, MS, INDIA

Int. Res. J. Biological Sci., Volume 1, Issue (5), Pages 13-17, September,10 (2012)

Abstract

Redox potential technique can be used for minimizing sludge. Redox potential is nothing but any oxidation-reduction (redox) reaction can be divided into two half, one in which another chemical species undergoes reduction. If a half reaction is written as a reduction, the driving force is the reduction potential. If the half-reaction is written as oxidation, the driving force is the oxidation potential related to the reduction potential by a sign change. So the redox potential is the reduction/oxidation potential of a compound measured under standards conditions against a standard reference half-cell. In biological systems the standard redox potential is defined at pH – 7.0 versus the hydrogen electrode and partial pressure of hydrogen = 1 bar. In these project efforts was made to determine the feasibility of activated sludge process (ASP) for the treatment of synthetic wastewater and to develop simple design criteria under local conditions. A bench scale model comprising of an aeration tank and final clarifier was used for this purpose. Synthetic wastewater prepared in the laboratory using Glucose as the main source of carbon and the required nutrients were treated using mixed culture microorganisms on a batch as well as continuous manner. The reduction in COD and the increase in cell production analyzed. The characteristics of the settled sludge were determined by sludge volume index (SVI). The sludge produced during the treatment has separately treated with water having negative redox potential to study the effect on the reduction of the excel production. Known quantity of sludge was mixed with different volumes of redox potential solution to study the percentage reduction with and without stirring as a function of time. The results were used to optimize the time and percentage reduction.

References

  1. M.Zlokarnik Verfahrenstechnik der aeroben Wasserreinigung Chem. Ing. Tech 54 (939-952), (1981)
  2. H.Brauer and D.Saucker Biological waste water treatment in a high efficiency reactor. Ger. Chem. Engg. 2, 77-86, (1979)
  3. U. Wachsmann, N. Rabiger and A. Vogelpohl “The Compact reactor. A newly developed loop reactor with high mass transfer performance. Ger. Chem. Engg. 7, 39-44, (1984)
  4. Bergey’s manual of systematic bacteriology, H. A. Peter (ed), Baltimore: Williams Wilkins, (1984)
  5. Bernd Bilitewski, Georg Härdtle, Klaus Marek Bergey’s manual of systematic bacteriology (1984)
  6. Sievers et al., Sludge treatment by ozonation – Evaluation of full-scale results, Water Science and Technology, 49(4),247–253 (2004)
  7. Chobanoglous G., Burton F.L. and Stensel H.D., Introduction to process analysis and selection, Wastewater Engineering: Treatment and Reuse, ed. G. Tchobanoglous, F.L. Burton and H.D. Stensel, McGraw-Hill: Boston, 215-310 (2003)
  8. APHA, Standard methods for the Examination of Water and Wastewater, 19 ed., American Public Health Association, Washington, DC (1995)
  9. Martins A.M.P., Pagilla K., Heijnen J.J. and Van Loosdrecht M.C.M., Filamentous bulking sludge–a critical review, Water Research, 38, 793-817 (2004)
  10. Buffalo N.Y., Michael Richard, Sear-Brown Fort Collins, CO, Activated Sludge Microbiology Problems and their control, Presented at the 20th Annual USEPA National Operator Trainers Conference June 8, (2003)
  11. Baikun Li, Paul L. Bishop, The Application of ORP in Activated Sludge Wastewater Treatment Processes, Environmental Engineering Science, (2001)
  12. Richard M.G., Activated Sludge Microbiology, Water Environment Federation, Alexandria, VA, (1989)
  13. Ibrahim H.A. and El-Sheikh E.M., Bioleaching Treatment of Abu Zeneima Uraniferous Gibbsite Ore Material for Recovering U, REEs, Al and Zn, Res.J.Chem.Sci., 1(4),55-66 (2011)
  14. Veeraputhiran V. and Alagumuthu G., Treatment of High Fluoride Drinking Water Using Bioadsorbent, Res.J.Chem.Sci.,1(4), 49-54 (2011)
  15. Dwivedi Naveen, Majumder C.B, Mondal P. and Dwivedi Shubha, Biological Treatment of Cyanide Containing Wastewater, Research Journal of Chemical Sciences, 1(7), 15-21 (2011)
  16. Vaishnav M.M. and Dewangan S., Assessment of Water Quality Status in Reference to Statistical Parameters in Different Aquifers of Balco Industrial Area, Korba, C.G. INDIA, Research Journal of Chemical Sciences, 1(9), 67-72 (2011)
  17. Ala'a Abdulrazaq Jassim, Design and Evaluation of Separation Towers in Water Treatment Plants, Research Journal of Chemical Sciences, 1(5), 14-21 (2011)