期刊
BIORESOURCE TECHNOLOGY
卷 209, 期 -, 页码 31-39出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.02.089
关键词
Dissolved organic matter (DOM); Parallel factor analysis (PARAFAC); Membrane bioreactor (MBR); Bound extracellular polymeric substance (bEPS); Soluble microbial products (SMP)
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2014R1A2A2A09049496]
In this study, we successfully tracked the dynamic changes in different constitutes of bound extracellular polymeric substances (bEPS), soluble microbial products (SMP), and permeate during the operation of bench scale membrane bioreactors (MBRs) via fluorescence excitation-emission matrix (EEM) combined with parallel factor analysis (PARAFAC). Three fluorescent groups were identified, including two protein-like (tryptophan-like C1 and tyrosine-like C2) and one microbial humic-like components (C3). In bEPS, protein-like components were consistently more dominant than C3 during the MBR operation, while their relative abundance in SMP depended on aeration intensities. C1 of bEPS exhibited a linear correlation (R-2 = 0.738; p < 0.01) with bEPS amounts in sludge, and C2 was closely related to the stability of sludge. The protein-like components were more greatly responsible for membrane fouling. Our study suggests that EEM-PARAFAC can be a promising monitoring tool to provide further insight into process evaluation and membrane fouling during MBR operation. (C) 2016 Elsevier Ltd. All rights reserved.
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