Browse > Article

Studies of Micro-Air Flotation for Removal of Turbidity  

Choi, Boram (Department of environmental engineering, Pukyong National University)
Kim, Dongsoo (Department of marine bio-materials and aquaculture, Pukyong National University)
Kim, Jongoh (Department of civil engineering, Gangneung-Wonju National University)
Kim, Taeyoon (Department of environmental engineering, Pukyong National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.8, 2013 , pp. 23-27 More about this Journal
Abstract
In this study, efficiency of pre-treatment of turbid seawater was measured where micro-air bubbles were used to remove particles in seawater after input of natural coagulant PGA. Artificial seawater was prepared having the intended trubidity using marine sediments and microalgae. 73.7% of turbidity removal was achieved when 0.5g/L of $AlCl_3{\cdot}6H_2O$ was added in the artificial seawater, but 92.4% of turbidity removal was observed when 0.05g/L of PGA was added in the artificial seawater containing microalgae. In addition, much greater turbidity removal was achieved for microalage than sediments. For both cases, input of 0.1g/L PGA and following additional input of micro-air bubbles for 5 seconds resulted in the maximum removal efficiency where reaction time of coagulation was 1 min and flotation by micro-air bubbles was 10 min. From this study, we concluded that micro-air floation after coagulation could be a possible economical pre-treatment method for highly turbid seawater.
Keywords
Desalination; Pre-treatment; Micro-air bubbles; Coagulant; Trubidity; Sediment; Microalgae;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Chu, L. B., Xing, X. H., Yu, A. F., Zhou, Y. N., Sun, X. L. and Jurcik, B.(2007), Enhanced ozonation of simulated dyestuff wastewater by microbubbles, Chemosphere, Vol. 68, No. 12, pp. 1854-1860.   DOI   ScienceOn
2 Chu, L. B., Xing, X. H., Yu, A. F., Sun, X. L. and Jurcik, B.(2008a), Enhanced treatment of practical textile wastewater by microbubble ozonation, Process Safety and Environ. Protection, Vol. 86, No. 2, pp. 389-393.   DOI   ScienceOn
3 Chu, L. B., Yan, S. T., Xing, X. H., Yu, A. F., Sun, X. L. and Jurcik, B.(2008b), Enhanced sludge solubilization by microbubble ozonation, Chemosphere, Vol. 72, No. 3, pp. 205 -212.   DOI   ScienceOn
4 Dincer, S. R., Karakaya, N., Gunes, E. and Gunes, Y.(2008), Removal of COD from oil recover industry wastewater by the advanced oxidation process (AOP) based on $H_2O_2$, Globe NEST J., Vol. 10, No. 1, pp. 31-38.
5 Kilic, M. Y., Kestioglu, K. and Yonar, T.(2007), Landfill leachate treatment by the combination of physicochemical methods with adsorption process, J. Biol. Environ. Sci., Vol. 1, No. 1, pp. 37-43.
6 Konig, E. H. and Van Der Merwe, I. W.(2000), Applying ultrafiltration as polishing process in direct water reclamation, Proceedings of the Water Institute of Southern Africa (WISA), Sun City, pp. 127-128.
7 Li, P., Takahashi, M. and Chiba, K.(2009), Enhanced free-radical generation by shrinking microbubbles using a copper catalyst, Chemosphere, Vol. 77, No. 12, pp. 1157-1160.   DOI   ScienceOn
8 Liu, S., Wang, Q. H., Ma, H. Z., Huang, P. K., Li, J. and Kikuchi, T.(2010), Effect of micro-bubbles on coagulation flotation process of dyeing wastewater, Separation and Purification Technol., Vol. 71, No, 6, pp. 337-346.   DOI   ScienceOn
9 Takahashi, M., Kawamura, T., Yamamoto, Y., Ohnari, H., Himuro, S. and Shakutsui, H.(2003), Effect of shrinking microbubble on gas hydrate formation, J. Physic. Chem., Vol. B 107, No. 10, pp. 2171-2173.
10 Takahashi, M.(2005), ${\zeta}$ potential of microbubbles in aqueous solutions: electrical properties of the gas-water interface, J. Physic. Chem., Vol. B 109, No. 11, pp. 21858-21864.
11 Takahashi, M., Chiba, K. and Li. P.(2007), Free-radical generation from collapsing microbubbles in the absence of a dynamic stimulus, J. Physic. Chem., Vol. B 111, No. 8, pp. 1343-1347.
12 Yang, H. J. and Kim, H. S.(2009), Effect of coagulation on MF/UF for removal of particles as a pretreatment in sea water desalination, Desalination, Vol. 249, No. 7, pp. 42-52.
13 Yang, C.(2002), Observation of microbubble attachment onto a hydrophilic glass surface, Chemical Engr. Sci., Vol. 57, No. 11, pp. 1485-1488.   DOI   ScienceOn
14 Zhidong, L., Na, Z., Honglin, Z. and Dan, L.(2009), Studies and applications processes on flocculants in water treatment in China, Electron. J. Geotech. Eng., Vol. 14, No. 1, pp. 1-7.
15 Agarwal, A., Ng, W. J. and Liu, Y.(2011), Principle and applications of microbubble and nanobubble technology for water treatment, Chemosphere, Vol. 84, No. 8, pp. 1175-1180.   DOI   ScienceOn
16 Altaher, H.(2012), The use of chitosan as a coagulant in the pre-treatment of turbid sea water, J. Hazard. Mat., Vol. 233-234, No. 2, pp. 97-102.   DOI
17 Annadurai, G., Sung, S. S. and Lee, D. J.(2004), Simultaneous removal of trubidity and humic acid from high turbidity strom water, Adv. Environ. Res., Vol. 8, No. 3, pp. 713-725.   DOI   ScienceOn