Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Solubilization of wasted sludge using high voltage impulse technique

고전압 임펄스 기술을 활용한 슬러지 가용화

  • 조승연 (호서대학교 나노바이오트로닉스학과) ;
  • 장인성 (호서대학교 환경공학과)
  • Received : 2017.03.10
  • Accepted : 2017.06.21
  • Published : 2017.06.15
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Abstract

Several disposal processes for waste sludge from wastewater treatment plants such as landfill, ocean dump, incineration, reuse as fuels or fertilizers are practiced. However, ocean dumping is prohibited by international treat. New constructions of landfill sites or incineration facilities are limited by NIMBY and reuse processes are still suffering from low energy yield. Therefore, development of alternative processes for sludge disposal are currently needed. In this study, alternative technique for sludge solubilization using HVI (high voltage impulse) was suggested and verified experimentally. Sludge solubilization was carried out for 90 minutes using HVI discharge with peak voltage of 16 kV and pulse duration for 40 microsecond. About 3~9 % of MLSS and MLVSS concentration were reduced, but the soluble COD, TN, TP of the sludge increased to 372 %, 56 % and 102 % respectively. It indicates that the flocs and/or cells of the sludge were damaged by HVI. These resulted in flocs-disintegration and cells-lysis, which means the internal matters were bursted out of the flocs as well as the cells. Thus, electrical conductivity in bulk solution was increased. All of the results verified that the HVI could be used as an alternative technique for sludge solubilization processes.

Keywords

References

  1. Eaton, A. D., Clesceri, L. S., Rice, E. W. (1995). Standard method for the examination of water and wastewater, 19th edition. APHA, AWWA, WEF, USA.
  2. Aronsson, K., Ronner U., Borch E. (2005). Inactivation of Escherichia coli, Listeria innocua and Saccharomyces cerevisiae in relation to membrane permeabilization and subsequent leakage of intracellular compounds due to pulsed electric field processing", Int. J. Food Microb. 99, 19-32. https://doi.org/10.1016/j.ijfoodmicro.2004.07.012
  3. Chu, L., Yan S., Xing, X., Yu, A., Sun, X., Jurcik, B. (2008). Enhanced sludge solubilization by microbubble ozonation, Chemosphere, 72, 205-212. https://doi.org/10.1016/j.chemosphere.2008.01.054
  4. Dutreux, N., Notermans, S., Wijtzs, T., Gongora-Nieto, M., Barbosa-Canovas, G., Swanson B. (2000). Pulsed electric fields inactivation of attached and free-living Escherichia coli and Listeria innocua under several conditions, Int. J. Food Microb. 54, 91-98. https://doi.org/10.1016/S0168-1605(99)00175-0
  5. Jayaram, S. (200). Sterilization of liquid foods by pulsed electric fields, IEEE Electrical Insulation Magazine, 16, 17-25.
  6. Korean Ministry of Environment. (2008). Sewage statistics.
  7. Lee, C, Park, S. (2008). Improvement of solubilization and anaerobic biodegradability for sewage sludge using ultrasonic pre-treatment, J. of Korea Organic Resource Recycling Association, 16 (3), 83-90.
  8. Lee, C., Hwang, E., Kang, S., Bin, J., Lee, B. (2004). Reduction and solubilization of sewage sludge by ozonation, J. of Korean Society on Water Quality, 20 (3), 290-295.
  9. Liang, P., Huang, X., Qian Y. (2006). Excess sludge reduction in activated sludge process though predation of Aeolosoma hemprichi, Biochem. Eng. J., 28, 117-122. https://doi.org/10.1016/j.bej.2005.09.008
  10. Loginov, M., Lebovka, N., Larue, O., Shynkaryk, M., Nonus, M., Lanoiselle, J., Vorobiev E. (2010). Effect of high voltage electrical discharges on filtration properties of Saccharomyces cerevisiae yeast suspensions, J. Membr. Sci. 346, 288-295. https://doi.org/10.1016/j.memsci.2009.09.048
  11. Loey, A., Verachtert, B., Hendrickx, M. (2002). Effects of high electric field pulses on enzymes, Trends in Food Sci. Technol. 12, 94-102.
  12. Raso, J. Heinz, V. (2006). Pulsed electric fields technology for the food industry: fundamentals and application, Springer.
  13. Reyens, K., Diels, A., Michiels, C. (2004). Generation of bactericidal and mutagenic components by pulsed electric field treatment, Int. J. Food Microb. 93, 165-173. https://doi.org/10.1016/j.ijfoodmicro.2003.10.014
  14. Vlyssides, A.G., Karlis, P.K. (2004). Thermal-alkaline solubilization of waste activated sludge as a pre-treatment stage for anaerobic digestion, Bioresource Technology, 91 (2), 201-206. https://doi.org/10.1016/S0960-8524(03)00176-7
  15. Yang, H., Lee J., Lee, E. (2008). Solubilization of Sewage Sludge by Inoculation of Lactic Acid Bacteria, Kor. J. Microbiol. Biotechnol. 36 (3), 233-239.
  16. Yang, Y., Friedman, A., Cho, Y. (2010). Plasma discharge in water, Advances in Heat Transfer, 42, 179-292.
  17. Yang, S., Chang, I. (2015). Control of scale formation using high voltage impulse", Journal of the Korea Academia-Industrial Cooperation Society, 16 (3), 2301-2307. https://doi.org/10.5762/KAIS.2015.16.3.2301
  18. Zhang, Q., Monsalve-Gonzalez, A., Qin B., Barbosa-Canovas, G., Swanson, B. (1994). Inactivation of Saccharomyces cerevisiae by square wave and exponential decay pulsed electric field, J. Food Process Eng. 17, 469-479. https://doi.org/10.1111/j.1745-4530.1994.tb00350.x

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