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http://dx.doi.org/10.11001/jksww.2015.29.3.371

A study on the removal of particulate matters using unidirectional flushing  

Kim, Dooil (Civil and Environmental Engineering, Dankook University)
Cheon, Subin (Civil and Environmental Engineering, Dankook University)
Hyun, Inhwan (Civil and Environmental Engineering, Dankook University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.29, no.3, 2015 , pp. 371-380 More about this Journal
Abstract
Particulate matters in a water distribution system are main causes of turbidity and discoloration of tap water. They could be removed by conventional or uni-directional flushing in a water distribution system. The behaviors and required flow velocity of particles are not well known for their flushing. A model water main and hydrant were made from transparent acrylic pipe of 30mm and 16mm in diameter, respectively. We analyzed the effect of flushing velocity, particle density, and particle diameter. We found that the existence of break-though velocities at which particles begin to be removed, and which are affected by their physical properties. The removal efficiencies seemed to be influenced by resuspension capabilities related to their upward movement from the bottom. Heavy particles like scale were hard to remove through upflow hydrant because the falling velocity, calculated using Stokes' law, was higher. Particle removal efficiencies of upward hydrant and downward drain showed minor differences. Additionally, the length between hydrant and control valve affected flushing efficiency because the particulate matters were trapped in this space by inertia and recirculating flow.
Keywords
Uni-directional flushing; Water distribution system; Particle resuspension; Drinking water quality; Drinking water discoloration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Ahn, J. C., Park, K. I., (2005), Application of Flushing for Water Quality Improvement in Water Distribution System., Journal of Korean Society of Water & Wastewater, 19(11), pp. 66-77
2 AWWA, (1986), Manual on maintaining distribution system water quality, Denver, Colorado
3 Bae, C. H., Choi, D. Y., Kim, J. H., and Kim, D. H, (2014), The assessment of self cleaning velocity and optimal flushing velocity in water distribution system, Journal of Korean Society of Water and Wastewater, 28(4), pp. 441-451   DOI
4 Barkatta, A., Pulvirentia, A. L., Adel-Hadadia, M. A., Viragha, C., Senftleb, F. E., Thorpeb, A. N., Grantb, J. R., (2009), Composition and particle size of super paramagnetic corrosion products in tap water, Water Research, 43, pp. 3319-3325   DOI
5 Antoun, E. N., Dyksen, J. E., and Hiltebrand, D. J. (1999), Unidirectional flushing: A powerful tool. J. American Water Works Association, 917, pp. 62-71.
6 Besner, M. C., Preost, M., Regli, S., (2011), Assessing the public health risk of microbial intrusion events in distribution systems: Conceptual model, available data, and challenges, Water Research, 45, pp. 961-979   DOI
7 Boxall, J. B., Skipworth, P. J., Saul, A.J., (2001), A novel approach to modelling sediment movement in distribution mains based on particle characteristics., Proceedings of the Computing and Control in the Water Industry Conference, De Monfort University, UK.
8 Boxall, J. B., Skipworth, P. J., Saul, A. J., (2003), Aggressive flushing for discolouration event mitigation in water distribution networks. Water Sci. and Technol. Water Supply 3(1/2), pp. 179-186.
9 Carriere, A., Gauthier, V., Desjardins, R., Barbeau, B., (2005), Evaluation of loose deposits in distribution systems through unidirectional flushing., J. American Water Works Association, 97(9), pp. 82-92
10 Clark, R. M., Grayman, W. M., Males, R. M., Hess, A. F., (1993), Modeling contamination propagation in drinking water distribution systems. J. Environ. Eng. ASCE 119(2), pp. 349-354.   DOI
11 Chadderton, R. A.; Christensen, G. L.; Henry-Unrath, P., (1993), Planning a Distribution System Flushing Program, J. American Water Works Association, 85(7), pp. 89-94
12 Echeverria, F., Castano, J. G., Arroyave, C., Penuela, G., Ramirez, A., Morato, J., , (2009), Characterization of deposits formed in a water distribution system, Ingeniare. Revista chilena de ingenieria, 17(2), pp. 275-281
13 Friedman, M., Kirmeyer, G. J., and Antoun, E., (2002), Developing and implementing a distribution system flushing program. J. Am. Water Works Assoc., 947, pp. 48-56.
14 Friedman, M., et al. (2003). Establishing site-specific flushing velocities, AWWA Research Foundation, Denver.
15 Gauthier, V., Rosin, C., Mathieu, L., Portal, J. M., Block, J. C., Chaix, P., Gatel, D., (1996), Characterization of the deposits in drinking water distribution systems., Proceedings of the Water Quality Technology Conference of American Water Works Association
16 Lee, H., (2014), Current perception for tap water and suggestions to promote its direct consumption., March, Water Journal, http://www.waterjournal.co.kr/news/articleView.html?idxno=19295
17 Jang, M., Biofilm Formation and Microbiologically Induced Corrosion in Water Distribution System., A doctoral dissertation, The university of Seoul, Republic of Korea, Feburary 2009.
18 Koizumi, A., (2005), The research on the interpretation of the flow field related to the turbid matter motion in the water pipeline, Research Conference in the national capital research presentation handbook, 56(5), pp. 368-369
19 Kirmeyer, G. J., Friedman, M., Clement, J., Sandvig, A., Noran, P. F., Martel, K. D., Smith, D., LeChevallier, M., Volk, C., Antoun, E., Hiltebrand, D., Dyksen, J., Cushing, R., (2000), Guidance manual for maintaining distribution system water quality. Report No. 90798, Research Foundation and American Water Works Association, AWWA Denver, USA.
20 Koizumi, A., (2005), The experimental study about the turbid matter motion in the conduit line, Journal of Japan Water Works Association, 74(11), pp. 2-12.
21 Lindley, T. R., Buchberger, S. G., (2002), Assessing intrusion susceptibility in distribution systems., Journal of American Water Works Association 94(6), pp. 66-79
22 Markku J. L., Tarja K. N., Ilkka T. M., Pertti J. M., Terttu V., (2004), Removal of soft deposits from the distribution system improves the drinking water quality, Water Research 38, pp. 601-610   DOI
23 Poulin, A., Mailhot A., Periche N., Delorme L., and Villeneuve J.P., (2010), Planning unidirectional flushing operations as a response to drinking water distribution system contamination, Journal of Water Resources Planning and Management, ASCE, Nov./Dec., pp. 647-657
24 Propato, M. and Uber, J., Vulnerability of Water Distribution Systems to Pathogen Intrusion: How Effective Is a Disinfectant Residual, (2004), Environ. Sci. Technol., 38, pp. 3713-3722   DOI
25 Vreeburg, J. H. G., Schaap, P. G., van Dijk, J. C., (2004), Particles in the drinking water syste: from source to discolouration. Water Sci. Technol. 4(5/6), pp. 431-438.
26 Sadiq, R., Kleinera Y. and Rajania, B., (2006), Estimating risk of contaminant intrusion in water distribution networks using Dempster-Shafer theory of evidence, Civil Engineering and Environmental Systems, Special Issue: Papers selected from the Eighth International Conference on Computing and Control for the Water Industry, 23(3), pp. 129-141
27 Slaats, P. G. G., Rosenthal, L. P. M., Sieger, W .G., van den Boomen, M., Beuken, R. H. S., Vreeburg, J. H. G., (2002), Processes involved in generation of discoloured water. Report No. KOA 02.058, American Water Works Association Research Foundation/Kiwa, The Netherlands.
28 Vairavamoorthy, K., Yan, J., Harshal, M. G., Sunil, D., (2007), (2007), A GIS-based risk analysis tool for water distribution systems, Environmental Modelling & Software, 22, pp. 951-965   DOI
29 Vreeburg, J. H. G. , Schippers, D. , Verberk, J. Q. J. C. , and van Dijk J. C., (2008), Impact of particles on sediment accumulation in a drinking water distribution system, Water Research, 42, pp. 4233-4242   DOI   ScienceOn
30 Walski, T. M., (1991) Understanding solids transport in water distribution systems. Proceedings Water Quality Modelling in Distribution Systems, AWWA Research Foundation, USA, pp. 305-309.