Correlation between effluent organic matter characteristics and membrane fouling in a membrane bioreactor using advanced organic matter characterization tools
- Correlation between effluent organic matter characteristics and membrane fouling in a membrane bioreactor using advanced organic matter characterization tools
- Byeong Gyu Choi; Jinwoo Cho; 송경근; Sung Kyu Maeng
- Adenosine triphosphate; Effluent organic matter; Membrane bioreactor; Membrane fouling; Principal component analysis
- Issue Date
- VOL 309, 74-83
- Three identical bench-scale membrane bioreactors (MBRs) were operated to investigate the formation of effluent
organic matter (EfOM) via biodegradation at different solid retention times (8, 20 and 80 days). The
characteristics of organic matter in supernatants, bound extracellular polymeric substances (EPS), soluble
microbial products (SMP) and effluents changed at different solid retention times (SRTs). EfOM characteristics
affecting membrane fouling with respect to total hydraulic resistances and specific cake resistances were
investigated using advanced organic characterization tools. EfOM characteristics determined by size exclusion
chromatography with organic carbon detection, fluorescence excitation–emission matrix spectroscopy
and polarity rapid assessment method were compared with the membrane fouling. In this study, a database
collected from three identical bench-scale MBRs operated at different SRTs for 12 months is analyzed to investigate
the intercorrelations (either positive or negative) between EfOM characteristics and membrane
fouling using principal component analysis (PCA). Principal component-1 embodied the characteristics of
EfOM (i.e., aliphatic biopolymers vs. aromatic humic substances), and explained 59% of the data variability.
This study provides useful data on EfOM characteristics with membrane fouling, and a multivariate statistical
analysis (PCA) can be used to depict the intercorrelations between EfOM characteristics and SRTs in MBRs.
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