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CONTROL OF DIATOM BY PREOXIDATION AND COAGULATION IN WATER TREATMENT
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  • Journal title : Environmental Engineering Research
  • Volume 11, Issue 1,  2006, pp.45-53
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2006.11.1.045
 Title & Authors
CONTROL OF DIATOM BY PREOXIDATION AND COAGULATION IN WATER TREATMENT
Seo, Jeong-Mi; Kong, Dong-Soo; Ahn, Seoung-Koo; Kim, Hyun-Ook;
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 Abstract
Conventional coagulation is still the main treatment process for algae removal in water treatment. The coagulation efficiency can be significantly improved by the preoxidation of algae-containing water. Jar test was conducted to determine the optimal condition for the removal of diatoms, especially Cyclotella sp. by preoxidation and the subsequent coagulation. The effects of various concentration of PAC (Polyaluminum chloride) on coagulation with and without preoxidation using chlorine or potassium permanganate at different pHs (7.7 and 9.0) were evaluated. At pH 7.7, preoxidation with 2ppm followed by coagulation with 7.5 ppm PAC coagulant could reduce Cyclotella sp. concentration by 86%. At pH 9.0, preoxidation with 1 mg followed by coagulation with 12.5 ppm PAC coagulant reduced Cyclotella sp. concentration by 85%. Non-linear regression was applied to determine the optimal condition. At pH 7.7 and 9.0, R was over 0.9, respectively. The pH of algal blooming water is over 9.0. Algae (diatom; Cyelotella sp.) can be controlled in the following ways: preoxidation with 1 mg followed by coagulation with 12.5 ppm PAC coagulant can remove 80% algae from water. If water pH is adjusted to 7.7, it was expected that less amount of coagulant (7.5 or 10 mg PAC /L) after preoxidation ( 2 ppm or 0.33, 1 ppm) would be needed to achieve similar level of algae removal. The oxidation with 0.33ppm followed by coagulation with 7.5 ppm PAC coagulant was preferable due to cost-effectiveness of treatment condition and color problem after treatment.
 Keywords
coagulation;preoxidation;jar-test;diatom;chlorine (;);potassium permanganate (;);
 Language
English
 Cited by
 References
1.
Graham, N. J. D., Wardlaw V.E., Perry R., and Jiang J. -Q., 'Significance of algae as trihalomethane precursors,' Waf. Sci. Technol., 37(2), 83-89 (1998) crossref(new window)

2.
Plummer, J. D. and Edzwald, J. K., 'Effect of ozone on algae as precursors for trihalomethane and haloacetic acid production,' Environ. Sci. Technol., 35(18), 3661-3668 (2001) crossref(new window)

3.
Oliver, B. G., 'Dihaloacetonitriles in drinking water: Algae and fulvic acid as precursors,' Environ. Sci. Technol., 17(2), 80-83 (1983) crossref(new window)

4.
Akiba, M., Kumlkane, S., Kim, H. S., and Kltazawa, H., 'Algae as surrogate indices for the removal of Cryptosporidium oocysts by direct filtration,' Wat. Sci. Technol., 2(3), 73-80 (2002)

5.
Sukenik, A., Teltch, B., Wachs, A. W., Shelef, G., Nir, I., and Levanon, D., 'Effect of oxidants on microalgal coagulation,' Wat. Res., 21(5), 533-539 (1987) crossref(new window)

6.
Petrusevski, B., van, Breeman, A. N., and Alaerts, GJ., 'Effect of permanganate pretreatment and coagulation with dual coagulants on algae removal in direct filtration,' J Wat. Suppl.: Res. & Technol.AQUA, 45(5), 316-326(1996)

7.
Kim, S. H., 'Enhanced coagulation: Determination of controlling criteria and an effect on turbidity removal,' Environmental Engineering Research, 10(3), 105-111 (2005) crossref(new window)

8.
Water Service Research Institute, Report of Water Quality Analysis, Seoul WSRI., Korea (1998-2002)

9.
Watanabe, M. M. and Nozaki, H., NIES Collection List of Strains, 4th ed., Japan, p32 (1994)

10.
Kawamura, S., 'Recorrnnended Jar Test Procedure,' Integrated Design and Operation of Water Treatment Facilities, 2nd ed., John wiley & sons, USA, pp. 645-653 (2000)

11.
Hudson, H. E. Jr., 'Jar testing and utilization of jar test data,' Water Clarification Processes Practical Design and Evaluation, Van Nostrand Reinhold Co., New York (1981)

12.
American Water Works Association, American Society of Civil Engineers and Edward E. B., Water treatment plant design, third ed., McGraw-Hill. Inc., p.113 (1998)

13.
American Water Works Association, 'Operational Control of Coagulation and Filtration Processes,' AWWA manual M37, Amer. Wat. Works Assoc., USA, pp. 1-41 (1992)

14.
Lenore, S. C., Arnold, E. G., and Andrew, D. E., Standard Method for the Examination of Water and Wastewater, 20th ed., Amer. Public Health Assoc., Washington D.C., USA (1998)

15.
Petrusevski, B., van, Breeman. A. N., and Alaerts, G. J., 'Effect of permanganate pretreatment and coagulation with coagulants on algae removal in direct filtration,' IAWQ/IWSA workshop on removal of microorganisms from water and wastewater conference proceedings, Amsterdam, Netherlands (1995)

16.
Edzwald, J. K., Becker, W. C., and Wattier, K. L., 'Surrogate parameters for monitoring organic matter and THM precursors,' Water Works Assoc., 77(4), 122-132 (1985)

17.
Lee, C. W., Jung, C. W., Han, S. W., Kang, L. S., and Lee, J. H., 'The removal of algae by oxidation and coagulation processes,' J. KSEE., 23(9), 1527-1536 (2001)