Abstract
The Dissolved Air Flotation (DAF) process has been widely used for removing suspended solids with low density in water. Size and distribution curve of microbubbles were evaluated at various pressure and nozzle condition. The change in nozzle size affects significantly on the microbubble rather than that in pressure. Also, at a fixed pressure, the treatment efficiency increased with the decrease in nozzle size or the increase in pressure. Finally, the change in pressure and nozzle size can be controlled microbubble diameter and improved treatment efficiency without the additional investment.
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References
American Water Works Association (1999). Water quality and treatment, 5th Ed., McGraw hill, New York.
Bourgeois, J. C., Walsh, M. E., and Gagnon, G. A. (2004). “Treatment of drinking water residuals: Comparing sedimentation and dissolved air flotation performance with optimal cation rations.” Wat. Res., Vol. 38, No. 5, pp. 1173–7782, DOI: 10.1016/j.watres.2003.11.018.
De Rijk, S. E., Van der Graaf, J. H. J. M., and den Blanken, J. G. (1994). “Bubble size in flotation thickening.” Wat. Res., Vol. 28, No. 2, pp. 465–473, DOI: 10.1016/0043-1354(94)90284-4.
Edzwald, J. (1995). “Principles and application of dissolved-air-flotation.” Water Sci. Technol., Vol. 31, Nos. 3–4, pp. 1–23, DOI: 10.1016/0273-1223(95)00200-7.
Edzwald, J. K., Walsh, J. P., Kaminski, G. S., and Dunn, H. J. (1992). “Flocculation and air requirements for dissolved air flotation.” J. AWWA, Vol. 84, No. 3, pp. 32–39.
Han, M. Y. (2001). “Modeling of DAF: The effect of particle and bubble characteristics.” J. Water Supply. Res. Technol. AQUA, Vol. 51, No. 1, pp. 27–34.
Han, M. Y., Kim, C., Park, S., Kim, H., Lee, G., and Yu, H. (2007). “Development and application of tailored bubble size generator for dissolved air flotation.” Kor. Soc. Water Sci. Technol. J., Vol. 15, No. 7, pp. 13–23 (in Korean).
Han, M. Y., Park, Y. H., Kwak, D. H., and Kim, I. K. (2001). “Development of measuring bubble size in flotation process using on-line particle counter.” Kor. Soc. Water Wastewatrt, Vol. 15, No. 2, pp. 559–565 (in Korean).
Han, M. Y., Park, Y. H., Lee, J. and Shim, J. S. (2002). “The size characteristics of microbubble in DAF according to pressure conditions.” Kor. Soc. Water Wastewater, Vol. 16, No. 2, pp. 177–182.
Jeong, Y., Gwon, S., and Choi, Y. (1994). “Application of dissolved air flotation for water treatment.” Kor. Soc. Water Sci. Technol. J., Vol. 2, pp. 81–96 (in Korean).
Kwak, D. and Dockko, S. (2003). “Effect of controlling the if microbubble in DAF.” Proceeding of 2nd International Workshop on Flotation, B-5, pp. 157–167.
Kwak, D., Kim, S., Jeong, H., Park, Y., Yu, Y., and Lee, Y. (2011). “Particle separation and flotation efficiency by dissolved carbon dioxide flotation process.” Kor. Soc. Water Wastewater, Vol. 25, No. 4, pp. 471–478 (in Korean).
Rubio, J., Souza, M. L., and Smith, R. W. (2002). “Overview of flotation as a wastewater treatment technique.” Minerals Eng., Vol. 15, No. 1, pp. 139–155, DOI: 10.1016/S0892-6875(01)00216-3.
Zabel, T. (1985). “The advantages of dissolved air flotation for water treatment.” J. AWWA, Vol. 77, No. 5, pp. 42–45.
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Kim, SJ., Choi, J., Jeon, YT. et al. Microbubble-inducing characteristics depending on various nozzle and pressure in dissolved air flotation process. KSCE J Civ Eng 19, 558–563 (2015). https://doi.org/10.1007/s12205-013-0514-7
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DOI: https://doi.org/10.1007/s12205-013-0514-7