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 JWARP  Vol.11 No.1 , January 2019
Variable Chlorine Decay Rate Modeling of the Matsapha Town Water Network Using EPANET Program
Abstract: A variable chlorine decay rate modeling of the Matsapha town water network was developed based on initial chlorine dosages. The model was adequately described by a second order rate function of the chlorine decay rate with respect to the initial chlorine dose applied. Simulations of chlorine residuals within the Matsapha water distribution network were run using the EPANET 2.0 program at different initial chlorine dosages and using the variable decay rate as described by the second order model. The measurement results indicated that the use of constant decay rate tended to underestimate chlorine residuals leading to potentially excess dosages with the associated chemical cost and side effects. The error between the two rate models varied between 0% and 15%. It is suggested that the use of water quality simulation programs such as EPANET be enhanced through the extension programs that accommodate variable rate modeling of chlorine residuals within distribution systems.
Cite this paper: Tiruneh, A. , Debessai, T. , Bwembya, G. , Nkambule, S. and Zwane, L. (2019) Variable Chlorine Decay Rate Modeling of the Matsapha Town Water Network Using EPANET Program. Journal of Water Resource and Protection, 11, 37-52. doi: 10.4236/jwarp.2019.111003.
References

[1]   Robescu, D., Jivan, N. and Robescu, D. (2008) Modeling Chlorine Decay in Drinking Water Mains. Environmental Engineering and Management Journal, 7, 737-741.
https://doi.org/10.30638/eemj.2008.099

[2]   White, G.C. (1972) Handbook of Chlorination. Van Nostrand Reinhold Company, New York, NY.

[3]   EPA-Environmental Protection Agency (1974) New Orleans Area Water Supply Study. Lower Mississippi River Facility, Slidell.

[4]   Vhutshilo, A., Madzivhandila, E. and Chirwa, M.N. (2017) Modeling Chlorine Decay in Drinking Water Distribution Systems Using Aquasim. Chemical Engineering Transactions, 57, 1111-1116.

[5]   Barakat, M.A., Tseng, J.M. and Huang, C.P. (2005) Hydrogen Peroxide-Assisted Photo Catalytic Oxidation of Phenolic Compounds. Applied Catalysis B: Environmental, 59, 99-104.
https://doi.org/10.1016/j.apcatb.2005.01.004

[6]   Gibbs, M.S., Morgana, N., Maiera, H.R., Dandya, G.C., Holmesb, M. and Nixon, J.B. (2006) Use of Artificial Neural Networks for Modeling Chlorine Residuals in Water Distribution Systems. Mathematical and Computer Modeling, 44, 485-498.
https://doi.org/10.1016/j.mcm.2006.01.007

[7]   Jones, S. and Marseden, P. (2017) Formation of DBPS during Booster Chlorination. Defra Project WT1291. Cranfield Water Science Institute, Cranfield University, Cranfield.

[8]   Lebel, G.L., Benoit, F.M. and Williams, D.T. (1997) A One-Year Survey of Halogenated Disinfection By-Products in the Distribution System of Treatment Plants Using Three Different Disinfection Processes. Chemosphere, 34, 2301-2317.
https://doi.org/10.1016/S0045-6535(97)00042-8

[9]   Williams, D.T., Lebel, G.L. and Benoit, F.M. (1997) Disinfection By-Products in Canadian Drinking Water. Chemosphere, 34, 299-316.
https://doi.org/10.1016/S0045-6535(96)00378-5

[10]   Singer, P.C., Obolensky, A. and Greiner, A. (1995) DBPs in Chlorinated North Carolina Drinking Waters. Journal of the American Water Works Association, 87, 83-92.
https://doi.org/10.1002/j.1551-8833.1995.tb06437.x

[11]   Williams, S.L., Rindfleisch, D.F. and Williams, R.L. (1995) Dead End on Haloacetic Acids (HAA). Proceedings of the AWWA Water Quality Technology Conference, San Francisco, 6-10 November 1994.

[12]   Rodriguez, M.J., West, J.R., Powell, J. and Sérodes, J.B. (1997) Application of Two Approaches to Model Chlorine Residuals in Severn Trent Water Ltd (STW) Distribution Systems. Water Science and Technology, 36, 317-324.
https://doi.org/10.2166/wst.1997.0227

[13]   Hua, F., West, J.R., Barker, R.A. and Forster, C.F. (1999) Modeling of Chlorine Decay in Municipal Water System. Water Research, 33, 2735-2746.
https://doi.org/10.1016/S0043-1354(98)00519-3

[14]   Rossman, L.A. (2000) EPANET 2.0 User Manual. Water Supply and Water Resources Division, National Risk management Laboratory, USEPA, Cincinnati, OH.

[15]   Vieira, P., Coelho, S.T. and Loureiro, D. (2004) Accounting for the Influence of Initial Chlorine Concentration, TOC, Iron and Temperature When Modeling Chlorine Decay in Water Supply. Journal of Water Supply: Research and Technology, 53, 453-467.
https://doi.org/10.2166/aqua.2004.0036

[16]   Powell, J.C., Hallam, N.B., West, J.R., Forster, C.F. and Simms, J. (2000) Factors Which Control Bulk Chlorine Decay Rates. Water Research, 34, 117-126.
https://doi.org/10.1016/S0043-1354(99)00097-4

[17]   Weber Jr., W.J. (1972) Physico-Chemical Processes for Water Quality Control. John Wiley and Sons, Inc., New York.

[18]   Murphy, S.B. (1985) Modeling Chlorine Concentrations in Municipal Water Systems. M.Sc. Thesis, Montana State University, Bozeman.

[19]   Rossman, L.A., Clark, R.M. and Grayman, W.M. (1994) Modeling Chlorine Residuals in Drinking Water Distribution Systems. Journal of Environmental Engineering, 120, 803-820.
https://doi.org/10.1061/(ASCE)0733-9372(1994)120:4(803)

[20]   Mayer, S.H., Powell, R.S. and Woodward, C.A. (2000) Calibration and Comparison of Chlorine Decay Models for a Test Water Distribution System. Journal of Water Research, 34, 2301-2309.
https://doi.org/10.1016/S0043-1354(99)00413-3

[21]   Rossman, L.A., Uber, J.G. and Frayman, W.M. (1995) Modeling Disinfectant Residuals in Drinking Water Storage Tanks. Journal of Environmental Engineering, 121, 752-755.
https://doi.org/10.1061/(ASCE)0733-9372(1995)121:10(752)

[22]   HDR Engineering, Inc. (2001) Water Quality Control in Distribution Systems. In: Handbook of Public Water Systems, Wiley, Hoboken, 2nd Edition, 722-740.

[23]   Mohamed, A., Bensoltane, M.A., Zeghadnia, A.L., Djemili, L., Gheid, A. and Djebbar, Y. (2018) Enhancement of the Free Residual Chlorine Concentration at the Ends of the Water Supply Network: Case Study of Souk Ahras City—Algeria. Journal of Water and Land Development, 38, 3-9.
https://doi.org/10.2478/jwld-2018-0036

[24]   Haider, H., Haydar, S., Sajid, M., Tesfamariam, S. and Sadiq, R. (2015) Framework for Optimizing Chlorine Dose in Small- to Medium-Sized Water Distribution Systems: A Case of a Residential Neighborhood in Lahore, Pakistan. Water SA, 41, 614-623.
https://doi.org/10.4314/wsa.v41i5.4

[25]   Foong, Y.C., Ghazaly, M.D. and Othman, F. (2004) Modeling of Chlorine Residual in the Water Distribution Network at Bukit Tunku, Kuala Lampur. Malaysian Journal of Science, 23, 193-201.

[26]   Clark, R.M. (1998) Chlorine Demand and THM Formation Kinetics: A Second-Order Model. Journal of Environmental Engineering, 124, 16-24.
https://doi.org/10.1061/(ASCE)0733-9372(1998)124:1(16)

[27]   Kastl, G.J., Fisher, I.H. and Jegatheesan, V. (1999) Evaluation of Chlorine Decay Kinetics Expressions for Drinking Water Distribution Systems Modeling. Journal of Water Supply: Research and Technology Aqua, 48, 219-226.
https://doi.org/10.2166/aqua.1999.0024

[28]   Fisher, I., Kast, G. and Sathasivan, A. (2011) Evaluation of Suitable Chlorine Bulk-Decay Models for Water Distribution Systems. Water Research, 45, 4896-4908.
https://doi.org/10.1016/j.watres.2011.06.032

[29]   Shang, F., Uber, J.G. and Rossman, L.A. (2008) Modeling Reaction and Transport of Multiple Species in Water Distribution Systems. Environmental Science & Technology, 42, 808-814.
https://doi.org/10.1021/es072011z

[30]   APHA (1999) Standard Methods for the Examination of Water and Wastewater: Chemical Oxygen Demand. American Public Health Association, American Water Works Association, Water Environment Federation.

 
 
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