Changes in spectroscopic signatures in soluble microbial products of activated sludge under different osmotic stress conditions

Changes in spectroscopic signatures in soluble microbial products of activated sludge under... Bioresource Technology 255 (2018) 29–38 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Changes in spectroscopic signatures in soluble microbial products of activated sludge under different osmotic stress conditions Tahir Maqbool, Jinwoo Cho, Jin Hur Department of Environment and Energy, Sejong University, Seoul 05006, South Korea GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Spectroscopic techniques were used to examine the subtle changes in soluble microbial products (SMP) of batch EEM-PARAFAC activated sludge bioreactors working at different salinities (i.e., 0%, 1%, 3%, and 5% NaCl). The changes in Dissolved organic matter different fluorescent constituent were tracked by excitation-emission matrix combined with parallel factor Oxygen uptake rate analysis (EEM-PARAFAC), and the sequential production was further identified by two-dimensional correlation Soluble microbial products spectroscopy (2D-COS). Greater enrichment of tryptophan-like component and large-sized biopolymer were Saline wastewater found in SMP for higher saline bioreactors, suggesting the SMP sources from bound extracellular polymeric Two-dimensional correlation spectroscopy substances and excreted intercellular constituents. 2D-COS revealed the opposite sequences of the fluorescence changes in SMP between the low and the high saline bioreactors, following the order of “tyrosine-like > tryptophan-like > humic-like fluorescence” for the latter. This study clarified the dominant mechanisms in- http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bioresource Technology Elsevier

Changes in spectroscopic signatures in soluble microbial products of activated sludge under different osmotic stress conditions

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0960-8524
D.O.I.
10.1016/j.biortech.2018.01.113
Publisher site
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Abstract

Bioresource Technology 255 (2018) 29–38 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Changes in spectroscopic signatures in soluble microbial products of activated sludge under different osmotic stress conditions Tahir Maqbool, Jinwoo Cho, Jin Hur Department of Environment and Energy, Sejong University, Seoul 05006, South Korea GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Spectroscopic techniques were used to examine the subtle changes in soluble microbial products (SMP) of batch EEM-PARAFAC activated sludge bioreactors working at different salinities (i.e., 0%, 1%, 3%, and 5% NaCl). The changes in Dissolved organic matter different fluorescent constituent were tracked by excitation-emission matrix combined with parallel factor Oxygen uptake rate analysis (EEM-PARAFAC), and the sequential production was further identified by two-dimensional correlation Soluble microbial products spectroscopy (2D-COS). Greater enrichment of tryptophan-like component and large-sized biopolymer were Saline wastewater found in SMP for higher saline bioreactors, suggesting the SMP sources from bound extracellular polymeric Two-dimensional correlation spectroscopy substances and excreted intercellular constituents. 2D-COS revealed the opposite sequences of the fluorescence changes in SMP between the low and the high saline bioreactors, following the order of “tyrosine-like > tryptophan-like > humic-like fluorescence” for the latter. This study clarified the dominant mechanisms in-

Journal

Bioresource TechnologyElsevier

Published: May 1, 2018

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