Browse > Article
http://dx.doi.org/10.4491/KSEE.2014.36.1.29

Removal Improvement in Water Treatment Plant for Occurrence of Diatoms (Synedra sp.) in the Nakdong River  

Kim, Min-Chai (Kwater Gyeongnam Busan Water Supply Regional Headquarters)
Kim, Ji-Hoon (Kwater Gyeongnam Busan Water Supply Regional Headquarters)
Seo, Gyu-Tae (Department of Environmental Engineering, Changwon National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.36, no.1, 2014 , pp. 29-34 More about this Journal
Abstract
This study was conducted to investigate removal characteristics for Synedra sp. and filter run time (FRT) according to the cell length in the Nakdong River. When used alone flocculent, the removal efficiency for Synedra tenera (around $100{\mu}m$) was constant with 90.9~94.4%, while Synedra acus (around $300{\mu}m$) had the lower removal efficiency as 60~70%. $PACS_2$ and PAC showed 5~6% higher removal for S. acus than others (HiB and LAS). When added coagulant aid, loess had no effect and also needed more amount of flocculent. Sodium Silicate increased the removal rate by max 10.6%. On the other hand, 2.5 mg/L of Polyamine showed 96.9% removal efficiency for S. acus increasing up to 25% more than $PACS_2$ alone. In the effect of water temperature, the removal for S. acus at $15^{\circ}C$ were 6% higher than at $4^{\circ}C$. There was no significant correlation between the removal efficiencys of turbidity and S. acus. The results of this study was similar to the actual water treatment process's removal characteristics for Synedra sp. depending on the cell length and temperature. In the actual process, the numbers of Synedra in settled water was established natural logarithm function with the filter run time (FRT), so we can predict FRT as Synedra numbers.
Keywords
Synedra; Algae; Coagulant; Coagulant-aid; Polyamine;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Ha, G., Kim, H. W. and Ju, G. J., "The correlation between Phytoplankton and Water Quality in Downstream of Nakdong River," Inje University Environment Institute, 4th Symposium, pp. 21-39(1995).
2 Lee, G. S., Kim, M. C., Kwon, J. K. and Seo, G. T., "Effect of pH adjustment by $CO_2$ on Coagulation and Aluminum Elution in Water Treatment," J. Kor. Soc. Environ. Eng., 35(1), 17-22(2013).   DOI
3 Lee, H. Y., "A study on the Filter Clogging by S. acus in raw water," Waterworks Headquarters Daegu Metropolitan City, Waterworks Workshop, pp. 247-236(1998).
4 Jun, H. B., Lee, Y. J., Lee, B. D. and Lee, J. D., "Optimal Combination of Coagulants for Removal of the Filter Clogging Algae," J. Kor. Soc. Environ. Eng., 20(12), 1803-1809
5 Hiroshi, K., Asuhisa, S. and Yasumoto, M., "Influence of Length of Slender Type Diatom and Size of Filter Grain to Filter Clogging Problem in Rapid Sand Filteration Process," Water Technol, 24(1), 41-47(1997).
6 Jun, H. B., Lee, Y. J., Lee, B. D. and Ahn, C. J., "Effect of the Ratio of Diatom Length to the Effective Size of Filter Medium on Filter Clogging," J. Kor. Geo-environ Soc., 2(1), 31-35(2001).
7 Park, G. T., "The Water treatment by Mixture of organic and inorganic coagulants at low temperatures," Master's Thesis, Kyungpook National University(1999).
8 Lee, J. D., "Sinking Behavior of Freshwater Diatoms-With Special Reference to Measurement of Phytoplankton Sinking Rate," J. Kor. Soc. Water Qual., 18(6), 683-692(2002).
9 Lim, Y. S., Song, W. S., Cho, J. S., Lee, H. J. and Heo, J. S., "The Effect of Algae on Coagulation and Filteration of Water Treatment Process," J. Kor. Environ. Agric., 19(1), 13-19(2000).   과학기술학회마을
10 Ha, T. W., "Analysis of the Characteristic for the Application of Polymer Flocculants (polyamine, poly (DADM)) to Potable Water Treatment," J. Environ. Sci., 13, 23-35(1999).
11 Gwak, J. U., "Aggregation of inorganic coagulants for water treatment theory and recent developments," 28th Water Symposium, Kwater, pp. 41-65(1994).
12 Ha, G. S., Lee, S. W. and Lee B. S., "Removal of Synedra A. by coagulation in raw drinking water," Proceeding of the 1998 spring conference, Kor. Soc. Environ. Eng., pp. 316-317(1998).
13 Jun, H. B., "Effects of Prechlorination on Diatoms Coagulation," J. Kor. Soc. Water Environ., 17(3), 347-365(2001).   과학기술학회마을
14 Choi, S. K., Lee, J. Y. and Cho, K. J., "Floc-Sedimentation Efficiency of Problematic Algae in the Water Treatment Process," Proceeding of the 2003 autumn joint conference of KSWW and KSWQ, E51-E53.
15 KWWA, Waterworks facility standards, pp. 332-333(2010).
16 Lee, J. H. and Kim, Y. J., "A study on the Removal of Algae by Coagulation and Sedimentation in the Raw water of the Nakdong River," J. Kor. Soc. Environ. Eng., 10(2), 113-117 (2001).
17 NIER, "Phytoplankton occurrence of the Nakdong River," NIER, pp. 35-37(2000).
18 Park, J. H., Lee, J. D. and Cho, S. J., "Study of diatom removal by preozonation and polyamine coagulat and characteristics of their sinking rate," Proceeding of the 2001 autumn joint conference of KSWW and KSWQ, pp. 347-350.
19 Kim, S. J., "Flocculation of Red Tide Organisms in Sea Water by Using an Ignited Oyster Shell Powder and Loess Combination," J. Kor. Fish. Soc., 36(6), 716-722(2003).   과학기술학회마을   DOI   ScienceOn
20 Lee, H. D., Lee, E. S. and Seo, G. T., Biology of Waterworks, pursuit of truth publisher corp., pp. 35-39, 209-250 (1996).
21 Kawamura, S., "Considerations on Improving Flocculation," J. AWWA, Research, pp. 328-337(1976).
22 Lee, Y. J., Coagulation Characteristics and Removal Mechanism of Filter Clogging Algae, Master's Thesis, Chungnam National University(1999). (1998).