Effect of Wastewater Treatment on Bio-kinetics of Dissolved Oxygen in River Ravi

Article Sidebar

PDF
Published: Jun 22, 2016

Main Article Content

Husnain Haider
Waris Ali

Abstract

Waste management studies are usually done using calibrated and verified water quality models. Ravi River located in Lahore, Pakistan is receiving untreated wastewater from number of outfalls and surface drains and thus model calibration and verification are done using the data under the prevailing conditions. The water quality objectives can only be met with wastewater treatment wherein the model rate coefficients may change. The objective of this paper is to study the changes that may occur in these coefficients as a result of wastewater treatment. For this purpose, long-term BOD analyses have been carried out using river water and wastewater after different degrees of treatment. A laboratory scale biological reactor was used to study the effect of biological treatment on rate coefficients at 3, 6 and 10 days detention times. The study results show that CBOD biokinetic rate coefficient (K) reduces significantly from 0.25 day-1 for raw wastewater to 0.1 day-1 for the wastewater treatment for 3 days detention time in the biological reactor. Further reductions in the value of K to 0.07 day-1 and 0.05 day-1 occurred for a treatment level corresponding to 6 and 10 days detention times, respectively. The NBOD rate coefficient (Kn) was found to be 0.08 day-1 for 3 days detention time and 0.06 day-1 after treatment in the biological reactor at 6 and 10 days detention times

Article Details

Issue
2010: Volume 6 JAN 2010
Section
City and Regional Planning, Environmental Engineering, Architecture

References

Pany, A. K, Neela, N & Sangita, S. A New Mixed Finite Element Method for Burgers’ Equation. J. Appl. Math. & Computing Vol. 23, No. 1 - 2, pp. 43 – 55,(2007).

Burgers, J. M. A Mathematical Model Illustrating the Theory of Turbulence. Advances in Applied Mechanics, Academic Press, New York 1, 171-199(1948).

Burgers, J. M. Mathematical Examples Illustrating Relations Occurring in the Theory of Turbulent Fluid Motion, Trans. Roy. Neth. Acad. Sci. Amsterdam 17, 1-53(1939).

Jeanne, A. A, Jeffrey T. B & Belinda, B. K. Reduced Order Controllers for Burgers’ Equation with A Nonlinear Observer. Int. J. Appl. Math. Comput. Sci., , Vol.11, No.6, 1311-1330(2001).

Anderson, D.A, Tannhill, J.C & Plecher, R.H. Computational Fluid Mechanics and Heat Transfer. Hemisphere publishing corporation McGraw Hill Book Company (1984).