| Title |
Effects of EPS Composition on Fouling Characteristics at the Microalgal-MBR and Bacterial-MBR Process |
| Authors |
김태연 ( Tae-yeon Kim ) ; 이수현 ( Su-hyeon Lee ) ; 권수민 ( Su-min Kwon ) ; 황선진 ( Sun Jin Hwang ) |
| DOI |
https://doi.org/10.15681/KSWE.2023.39.2.175 |
| Keywords |
C-EPS; Fouling; MBR; Microalgae; P-EPS |
| 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. |