상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제35권6호
  • /
  • Pages.489-496
  • /
  • 2021
  • /
  • 1225-7672(pISSN)
  • /
  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
권호 표지
DOI QR코드

DOI QR Code

LED 광원 UV에 의한 대장균(E. coli) 소독의 속도론 해석

Kinetic analysis of E. coli disinfection using UV-LED

  • 김경래 (호서대학교 환경공학과) ;
  • 장인성 (호서대학교 환경공학과)
  • Kim, Kyeong-Rae (Department of Environmental Engineering, Hoseo University) ;
  • Chang, In-Soung (Department of Environmental Engineering, Hoseo University)
  • 투고 : 2021.11.16
  • 심사 : 2021.12.10
  • 발행 : 2021.12.15
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Water disinfection using UV-LED(Light emitting diode) has many advantages, such as smaller footprint and power consumption as well as relatively longer lifespan than those of conventional mercury-UV lamps. Moreover, UV-LED disinfection is considered an environmentally benign process due to its mercury-free nature. In this study, disinfection using an LED module emitting 275nm UV was carried out. 384 UV-LEDs were put into a cylinder tube with a capacity of 1.7 liters. The UV intensity of the UV-LED module was controlled from 1.7 to 8.4 mW/cm2. The disinfection efficiency for the model microorganism solutions(E. coli ) was monitored. As the UV intensity(I) and contact time(t) varied, inactivation of the microorganisms from 2 to 4-log-removals(i.e., 99 to 99.99% of disinfection efficiency) was achieved. Disinfection using UV-LED was followed to 1st order reaction and the reaction rate constant, k was determined. In addition, the relationship between UV intensity(I) and contact time(t) in order to obtain 99.99% of disinfection efficiency was modeled: I1.2·t= 460, which indicates that the product of UV intensity and contact time requiring 4-log-removals is always constant.

키워드

과제정보

본 연구는 중소벤처기업부의 연구비 지원으로 수행되었습니다(과제번호: S2712599).

참고문헌

  1. Brahmi, M., Belhadi, N.H., Hamdi, H. and Hassen, A. (2010). Modeling of secondary treated wastewater disinfection by UV irradiation : Effects of suspended solids content, J. Environ. Sci., 22(8), 1218-1224. https://doi.org/10.1016/S1001-0742(09)60241-2
  2. Hijnen, W.A.M., Beerendonk, E.F. and Medema, G.J. (2006). Inactivation credit of UV radiation for viruses, bacteria and protozoan (oo)cysts in water: A review, Water Res., 40, 3-22. https://doi.org/10.1016/j.watres.2005.10.030
  3. Kim, B.S., Lee, H.S. and Kim, Y.K. (2020). Analysis of microbial sterilization based on ultraviolet LEDs for smart farm, J. Korean Inst. Illum. Electr. Install. Eng., 34(4), 11-16.
  4. Li, G.O., Park, Y.S., Huo, Z.Y., Lu, Y. and Hu, H.Y. (2017). Comparison of UV-LED and low pressure UV for water disinfection: photoreactivation and dark repair of Escherichia coli, Water Res., 126, 134-143. https://doi.org/10.1016/j.watres.2017.09.030
  5. Li, X., Cai, M., Wang, L., Niu, F., Yang, D. and Zhang, G. (2019). Evaluation survey of microbial disinfection methods in UV-LED water treatment systems, Sci. Total Environ., 659, 1415-1427. https://doi.org/10.1016/j.scitotenv.2018.12.344
  6. Liu, L., Xing, X., Hu, C., Wang, H. and Lyu, L. (2019). Effect of sequential UV/free chlorine disinfection on opportunistic pathogens and microbial community structure in simulated drinking water distribution systems, Chemosphere, 219, 971-980. https://doi.org/10.1016/j.chemosphere.2018.12.067
  7. Liu, J. and Zhang, X. (2014). Comparative toxicity of new halophenolic DBPs in chlorinated saline wastewater effluents against a marine alga: halophenolic DBPs are generally more toxic than haloaliphatic ones, Water Res., 65, 64-72. https://doi.org/10.1016/j.watres.2014.07.024
  8. Matafonova, G. and Batoev, V. (2018). Recent advances in application of UV light-emitting diodes for degrading organic pollutants in water through advanced oxidation processes: A review, Water Res., 132, 177-189. https://doi.org/10.1016/j.watres.2017.12.079
  9. Mori, M., Hamamoto, A., Takahashi, A., Nakano, M., Wakikawa, N., Tachibana, S., Ikehara, T., Nakaya, Y., Akutagawa, M. and Kinouchi, Y. (2007). Development of a new water sterilization device with a 365 nm UV-LED, Med. Bio. Eng. Comput., 45, 1237-1241. https://doi.org/10.1007/s11517-007-0263-1
  10. Park, B.J., Ryu, J.H. and Park, J.B. (2013). The development of cleaning and monitoring system for pipeline type UV sterilizer, JKAIS, 14(12), 6434-6440.
  11. Rennecker, J.L., Marinas, B.J., Owens, J.H. and Rice, E.W. (1999). Inactivation of Cryptosporidium parvumoocysys with ozone, Water Res., 33(11), 2481-2488. https://doi.org/10.1016/S0043-1354(99)00116-5
  12. Son, H., Cho, M., Kim, J., Oh, B., Chung, H. and Yoon, J. (2005). Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine, Water Res., 39, 721-727. https://doi.org/10.1016/j.watres.2004.10.018
  13. Song, K., Mohseni, M. and Taghipour, F. (2016). Application of ultraviolet light-emitting diodes (UV-LEDs) for water disinfection: A review, Water Res., 94, 341-349. https://doi.org/10.1016/j.watres.2016.03.003
  14. Sun, Y.X., Wu, O.Y., HU, H.Y. and Tian, J. (2009). Effect of bromide on the formation of disinfection by-products during wastewater chlorination, Water Res., 43, 2391-2398. https://doi.org/10.1016/j.watres.2009.02.033
  15. Tchobanoglous, G. and Schroeder, E.D. (1985). Water quality, characteristics, modeling, modification. Pearson Education Inc., USA, 235-241.
  16. Vilhunen S., Sarkka, H. and Sillanpaa, M. (2009). Ultraviolet light-emitting diodes in water disinfection, Environ. Sci. Pollut. Res., 16, 439-442. https://doi.org/10.1007/s11356-009-0103-y
  17. Wurtele M.A., Kolbe, T., Lipsz, M., Weyers, M., Kneissl, M. and Jekel, M. (2011). Application of GaN-based ultraviolet-C light emitting diodes - UV LEDs - for water disinfection, Water Res., 45, 1481-1489. https://doi.org/10.1016/j.watres.2010.11.015
  18. Zhang, J., Zivic, N., Dumur, F., Xiao, P., Graff, B., Fouassier, J.P., Gimes, D. and Lalevee, J. (2014). UV-violet-blue LED induced polymerizations: specific photoinitiating systems at 365, 385, 395 and 405 nm, Polymer, 55, 6641-6648. https://doi.org/10.1016/j.polymer.2014.11.002