New Unstructured Mesh Water Quality Model for Cooling Water Biocide Discharges
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A new unstructured mesh coastal water and air quality model has been developed that includes species transport, nonlinear decay, by-product formation, and mass-exchange between sea and atmosphere. The model has been programmed with a graphical user interface and is applicable to coastal seawater, lakes, and rivers. Focused on species conversion and interaction with the atmosphere, the water and air quality model follows a modular approach. It is a compatible module which simulates distributions based on fluid dynamic field data of underlying existing hydrodynamic and atmospheric simulations. Nonlinear and spline approximations of decay and growth kinetics, by-product formation, and joint sea–atmosphere simulation have been embedded. The Windows application software includes functions allowing error analysis concerning mesh and finite volume approximation. In this work, a submerged residual chlorine cooling water discharge and halogenated matter by-product formation has been simulated. An error analysis has been carried out by varying vertical meshing, time-steps and comparing results based on explicit and implicit finite volume approximation. The new model has been named 3D Simulation for Marine and Atmospheric Reactive Transport, in short 3D SMART.
KeywordsWater quality model Finite volume method Matrix reordering Biocide Chlorination of cooling water Halogenated organic compounds
This publication was made possible by NPRP grant # 29-6-7-39 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
- 3.EPA (1980). Clean Water Act, Section 403, Ocean Discharge Criteria.Google Scholar
- 4.Abdel-Wahab, A., Linke, P., Alfadala, H. E., El-Halwagi, M. M., & Batchelor, B. (2009). Towards a holistic approach to the sustainable use of seawater for process cooling. advances in gas processing. Proceedings of the 1st Annual Gas Processing Symposium. pp. 332–340.Google Scholar
- 5.Lawen, J., Huaming, Y., Linke, P., & Abdel-Wahab, A. (2010). Industrial water discharge and biocide fate simulations with nonlinear conversion. Proceedings of the 2nd Annual Gas Processing Symposium. pp. 99–106.Google Scholar
- 6.Adenekan, A. E., Kolluru, V. S.,& Smith, J. P. (2009). Transport and fate of chlorinated by-products associated with cooling water discharges, advances in gas processing. Proceedings of the 1st Annual Gas Processing Symposium. pp. 341–353.Google Scholar
- 9.Lawen, J. (2012). http://www.cssr-qatar.com/index.php/math?showall=&start=6. Accessed 22 July 2013.
- 10.Abdel-Wahab, A., Khodary, A., & Bensalah, N. (2010). Formation of trihalomethanes (THMs) during seawater chlorination. Journal of Environmental Protection. doi: 10.4236/jep.2010.14053.
- 11.Versteeg, H., & Malalasekera, W. (2007). The finite volume method for convection–diffusion problems. In: Introduction to computational fluid dynamics: the finite volume method. Prentice Hall, England.Google Scholar
- 14.Huaming, Y. (2008). A study on optimum schemes for reclamation in a narrow bay using the finite volume method. China Academic Journal Electronic Publishing House.Google Scholar
- 15.Launder, B. E., & Spalding, D. B. (1972). Lectures in mathematical models of turbulence. London: Academic.Google Scholar
- 16.Gour-Tsyh, Y. (2002). Fluid flows and reactive chemical transport in variable saturated subsurface media. Environmental Fluid Mechanics Theories and Applications, 207–255.Google Scholar
- 17.Haidvogel, D. (1999). The hydrostatic Primitive Equations, Numerical Ocean Circulation Modeling, 19–21.Google Scholar
- 18.Chen, C., Beardsley, R. C., & Cowles, G. (2006). An unstructured grid, Finite-Volume Coastal Ocean Model. FVCOM user manual. Massachusetts: School of Marine and Technology-University of Massachusetts-Dartmouth and Woods Hole Oceanographic Institution. 3 p.Google Scholar
- 20.Panofsky, H. A., & Dutton, J. A. (1984). Atmospheric turbulence: models and methods for engineering applications. New York: Wiley.Google Scholar
- 25.Sander, R. (1999). Compilation of Henry’s law constants for inorganic and organic species of potential importance in environmental chemistry. http://www.henrys-law.org/henry.pdf. Accessed 24 July 2013.
- 26.McCoy, W. F., Blatchley, E. R. III, & Johnson, R. W. (1990). Hypohalous acid and haloamine flashoff in industrial cooling systems. TP90-09. Cooling Tower Institute.Google Scholar
- 27.Dewulf, A., Craps, M., Bouwen, R., Taillieu, T., & Pahl-Wostl, C. (2005). Integrated management of natural resources: dealing with ambiguous issues, multiple actors and diverging frames. Water Science and Technology, 52, 115–124.Google Scholar