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A Study on the Solubilisation of Excess Sludge using Microbubble Ozone  

Lee, Shun-Hwa (Department of Environmental Engineering, Yeungnam University)
Jung, Kye-Ju (Department of Environmental Engineering, Yeungnam University)
Kwon, Jin-Ha (Department of Environmental Engineering, Yeungnam University)
Lee, Se-Han (Department of Environmental Engineering, Yeungnam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.4, 2010 , pp. 325-332 More about this Journal
Abstract
This study was conducted with the experiment of solubilisation of excess sludge by microbubble ozone process. To improve ozone contact efficiency, microbubble ozones which its diameter were the avearge 30 ${\mu}m$, microbubble size less than 40 ${\mu}m$ occupied about over 90% of all. In treating sludge using microbubble ozones, in case microbubble ozones are injected at microbubble ozone dosage of 0.34 g $O_3/g$ SS or less regardless of sludge concentration, microbubble ozone consumption rate was found to be 100% with no emission of waste ozones. In treating sludges by each concentration, in case the initial SS concentration of sludge is set to 6,447 mg/L, 5,557 mg/L, 3,180 mg/L, 1,092 mg/L and 515 mg/L, the amount of removed SS tended to increase with increase in initial SS concentration for the same microbubble ozone dosage, and treatment of sludge with high initial SS concentration was effective in raising the oxidation efficiency of microbubble ozones. On the other hand, as a result of reviewing acid, alkali and microbubble ozone treatment as composite treatment of sludge, use of acid treatment for the pre-treatment of microbubble ozone was more effective than alkali treatment, and in case of treatment at microbubble ozone dosage 0.05g $O_3/g$ SS with the concentration of sulfuric acid infused in the sludge, the amount of removed SS, 153.9 g, was 1.9 times more than 81.2 g the amount of single treatment of microbubble ozone.
Keywords
Solubilisation; Microbubble; Excess sludge; Ozone; Acidic treatment;
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1 Saktaywin, W., Tsuno, H., Hagare, H., Soyama, T., Weerapakkaroon, J., "Advanced sewage treatment process with excess sludge reduction and phosphorus recoverty," Water Res., 39, 902-910(2005).   DOI   ScienceOn
2 Yasui, H., Shibata, M., "An innovative approach to reduce excess sludge production in the activated sludge process," Water Sci. & Technol, 30, 11-20(1994).
3 Yasui, H., Nakamura, K., Sakuma, S., Iwasaki, M., and Sakai, Y., "A full-scale operation of a novel activated sludge process without excess sludge production," Water Sci. & Technol., 34, 395-404(1996).   DOI   ScienceOn
4 Bougrier, C., Albasi, C., Delgenes, J. P., and Carrere, H., "Effect of ultrasonic, thermal and ozone pre-treatments on waste activated sludge solubilisation and anaerobic biodegradability," Chem. Eng. Proc., 45, 711-719(2006).   DOI   ScienceOn
5 이창근, 황은주, 강성재, 빈정인, 이병헌, "오존을 이용한 하수슬러지의 감량화와 안정화," 한국물환경학회지, 20, 290-295(2004).
6 Weemaes, M., Grootaerd, H., Simoens, F., and Verstraete, W., "Anaerobic digestion of ozonized biosolids," Water Res., 34, 2330-2336(2000).   DOI   ScienceOn
7 Cui, R., Jahng, D., "Nitrogen control in AO process with recirculation of solubilized excess sludge," Water Res., 38, 1159-1172(2004).   DOI   ScienceOn
8 Chu, L. B., Yan, S. T., Xing, X. H., Yu, A. F., Sun, X. L., and Jurcik, B., "Enhanced sludge solubilization by microbubble ozonation," Chemosphere, 72, 205-212(2008).   DOI   ScienceOn
9 Song, K. G., Choung, Y. K., Ahn, K. H., Cho, J. W., and Yun, H. J., "Performance of membrane bioreactor system with sludge ozonation process for minimization of excess sludge production," Desalination, 157, 353-359(2003).   DOI   ScienceOn
10 Lee, J. W., Cha, H. Y., Park, K. Y., Song, K. G., and Ahn, K. H., "Operational strategies for an activated sludge process in conjunction with ozone oxidation for zero excess sludge production during winter season," Water Res., 39, 1199-1204 (2005).   DOI   ScienceOn
11 안규홍, 차호영, "오존화 가스를 이용한 하수 슬러지의 분해.가 용화 및 슬러지의 호기성 소화 특성," 대한환경공학회 '99추계학 술연구발표회, pp. 5-6(1999).
12 Dziurla, M. A., Salhi, M., Leroy, P., Paul, E., Ginestet, Ph., and Block, J. C., "Variations of respiratory activity and glutathione in activated sludges exposed to low ozone doses," Water Res., 39, 2591-2598(2005).   DOI   ScienceOn
13 Zhang, G., Zhang, P., Yang, J., Chen, Y., "Ultrasonic reduction of excess sludge from the activated sludge system," J. Hazard. Mater., 145, 515-519(2007).   DOI   ScienceOn
14 Ahn, K. H., Yeom, I. T., Park, K. Y., Maeng, S. K., Lee, Y. H., Song, K. G., and Hwang, J. H., "Reduction of sludge by ozone treatment and production of carbon source for denitrification," Water Sci. & Technol., 46, 121-125(2002b).
15 Deleris, S., Paul, E., Audic, J. M., Roustan, M., and Debellefontaine, H., "Effect of ozonation on activated sludge solubilization and mineralization," Ozone Sci. Eng., 22, 473-486(2000).   DOI   ScienceOn
16 Manterola, G., Uriarte, I., and Sancho, L., "The effect of operational parameters of the process of sludge ozonation on the solubilisation of organic and nitrogenous compounds," Water Res., 42, 3191-3197(2008).   DOI   ScienceOn
17 Ahn, K. H., Park, K. Y., Maeng, S. K., Hwang, J. H., Lee, J. W., Song, and K. G., Choi, S., "Ozonation of wastewater sludge for reduction and recycling," Water Sci. & Technol., 46, 71-77(2002a).