Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effects of EPS Composition on Fouling Characteristics at the Microalgal-MBR and Bacterial-MBR Process

Microalgal-MBR과 Bacterial-MBR 운전에 있어 EPS 조성이 Fouling 발생특성에 미치는 영향

  • Tae-yeon Kim (Department of Applied Environmental Science, Kyung Hee University) ;
  • Su-Hyeon Lee (Department of Applied Environmental Science, Kyung Hee University) ;
  • Su-min Kwon (Department of Applied Environmental Science, Kyung Hee University) ;
  • Sun Jin Hwang (Department of Applied Environmental Science, Kyung Hee University)
  • 김태연 (경희대학교 일반대학원 환경응용과학과) ;
  • 이수현 (경희대학교 일반대학원 환경응용과학과) ;
  • 권수민 (경희대학교 일반대학원 환경응용과학과) ;
  • 황선진 (경희대학교 일반대학원 환경응용과학과)
  • Received : 2023.02.27
  • Accepted : 2023.03.20
  • Published : 2023.03.30
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Abstract

The aim of this study was to compare the fouling characteristics of Extracellular polymeric substances (EPS) secreted by Chlorella vulgaris with the case of Bacterial-MBR (BMBR), Microalgal-MBR (MMBR) for advanced wastewater treatment using the Laboratory scale, in order to suggest a method to minimize fouling in MMBR by identifying the effects of amounts and compositions of EPS secreted by C. vulgaris and bacteria in the activated sludge on fouling. Contrary to expectations, fouling occurred relatively severely in the MMBR from the beginning of the operation than in the BMBR. Reasons for such a fouling pattern were considered to be the effect of C-EPS, which accumulates on the membrane surface of MMBR 30 times more than that on the membrane surface of activated sludge (BMBR). In this respect, according to the results of this experiment and a comparative review of several previous studies, it was confirmed that unlike activated sludge, in which the ratio of P-EPS was relatively higher than that of C-EPS, in case of C. vulgaris, the ratio of C-EPS to P-EPS was relatively higher than that in case of activated sludge. This was presumed to be the main cause of the significant fouling phenomenon in MMBR. However, an increase in TMP with increasing C-EPS concentration was not observed.

Keywords

Acknowledgement

이 논문은 2018년도 정부(미래창조과학부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구이며(No.NRF-2019R1A2C1084155) 이에 감사드립니다.

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