Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A study on possibility of using CST as a fouling evaluation index at MBR

MBR에서 fouling 평가지표로서 CST의 활용 가능성에 대한 연구

  • Kim, Yun-Ji (Department of Applied Environmental Science, Kyung Hee University) ;
  • Choi, Yun-Jeong (Department of Applied Environmental Science, Kyung Hee University) ;
  • Sim, Tae-Suk (Department of Applied Environmental Science, Kyung Hee University) ;
  • Hwang, Sun-Jin (Department of Applied Environmental Science, Kyung Hee University)
  • 김윤지 (경희대학교 일반대학원 환경응용과학과) ;
  • 최윤정 (경희대학교 일반대학원 환경응용과학과) ;
  • 심태석 (경희대학교 일반대학원 환경응용과학과) ;
  • 황선진 (경희대학교 일반대학원 환경응용과학과)
  • Received : 2021.10.13
  • Accepted : 2021.11.03
  • Published : 2021.12.15
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Abstract

In general, trans-membrane pressure (TMP), flux, filtration resistance are used as indicators to evaluate the degree of fouling in MBR. However, they have limitations in determining the level of EPS generation, which is known as an important factor of fouling. Therefore, a new evaluation method is required to monitor the amount of EPS generation. In this study, the applicability of capillary suction time (CST), which is used to measure the dewaterability of sludge, was evaluated as an indirect fouling evaluation index. Statistical analysis was performed to evaluate the effect of EPS on CST, and to determine whether EPS has high similarity with representative fouling evaluation indicators and CST, and quantitatively compared them. As a result, the correlation coefficient between CST and bEPS was 0.7988, which was higher than the correlation coefficient between filtration resistance and bEPS. Since bEPS is a major factor inducing fouling by affecting the formation of the cake layer, it was evaluated that CST, which has a high correlation with bEPS, is suitable to represent EPS. In addition, it was evaluated that the correlation coefficient between filtration resistance and CST was high as 0.7187, which could be used as a fouling evaluation index.

Keywords

Acknowledgement

이 논문은 2019년도 정부(미래창조과학부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구이며(NRF-2019R1A2C1084155) 이에 감사드립니다.

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