Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Estimation of damage area on membrane surface by application of fluorescent particles as a surrogate

형광입자를 이용한 분리막 표면 검측과 손상 면적 추정 오차에 대한 연구

  • 최윤경 (세종대학교 환경에너지융합학과) ;
  • 김초아 (세종대학교 환경에너지융합학과) ;
  • 김희준 (지우이앤이주식회사) ;
  • 조진우 (세종대학교 환경에너지융합학과)
  • Received : 2014.02.11
  • Accepted : 2014.04.10
  • Published : 2014.04.15
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Abstract

In this study, a novel method was proposed to test the integrity of water treatment system specifically equipped with membrane filtration process. We applied the silica particles coated with a fluorescent agent (rhodamine B isothiocyanate) as a surrogate to detect a membrane process integrity and evaluate the reliability of effluent quality in the system. Additionally, a series of experiments was conducted to evaluate the sensitivity of the method through the laboratory scale experiment. The laboratory scale experiments showed that the feasibility of application of proposed method to detect a breach or damaged part on the membrane surface. However, the sensitivity on predicting the area of a breach was significantly influenced by the testing conditions such as a concentration of surrogate, filtration flux, and detection time. The lowest error of predicting the area of breach was 3.5% at the testing condition of surrogate concentration of 80 mg/L injected with flux of $20L/m^2/hr$ for 10 minutes of detection time for the breach having the actual area of $7.069mm^2$. However, the error of estimation was increased at the small breach with area less than $0.785mm^2$. A future study will be conducted to estimate a damaged area with more accuracy and precision.

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References

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