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.

ABSTRACT
1. 서 론
2. 연구방법
    2.1 식종 슬러지 배양
    2.2 실험장치 및 구성
    2.3 분석방법
3. 결 과
    3.1 EPS 발생특성 및 CST에 미치는 영향
    3.2 상관분석을 통한 CST의 활용 가능성 평가
4. 결 론
References

• 김윤지(경희대학교 일반대학원 환경응용과학과) | Yun-Ji Kim (Department of Applied Environmental Science, Kyung Hee University)
• 최윤정(경희대학교 일반대학원 환경응용과학과) | Yun-Jeong Choi (Department of Applied Environmental Science, Kyung Hee University)
• 심태석(경희대학교 일반대학원 환경응용과학과) | Tae-Suk Sim (Department of Applied Environmental Science, Kyung Hee University)
• 황선진(경희대학교 일반대학원 환경응용과학과) | Sun-Jin Hwang (Department of Applied Environmental Science, Kyung Hee University) Corresponding author