globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2017.11.008
Scopus ID: 2-s2.0-85033605153
Title:
Composition and functional group characterization of extracellular polymeric substances (EPS) in activated sludge: the impacts of polymerization degree of proteinaceous substrates
Author: Wang B.-B.; Liu X.-T.; Chen J.-M.; Peng D.-C.; He F.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2018
Volume: 129
pages begin: 133
pages end: 142
Language: 英语
Keyword: Activated sludge ; Extracellular polymeric substances ; Fourier transform infrared spectroscopy ; Proteinaceous substrate ; Size exclusion chromatography ; X-ray photoelectron spectroscopy
Scopus Keyword: Aromatic hydrocarbons ; Biological water treatment ; Dyes ; Fourier transform infrared spectroscopy ; Polymerization ; Proteins ; Size exclusion chromatography ; Substrates ; Wastewater treatment ; Activated sludge ; Activated sludge systems ; Biological waste water treatment ; Complex compositions ; Energy requirements ; Extra-cellular polymeric substances ; Polymerization degree ; Spectroscopic characterization ; X ray photoelectron spectroscopy ; cation exchange resin ; extracellular polymeric substance ; functional group ; hydrocarbon ; polymer ; polysaccharide ; protein ; unclassified drug ; polymer ; polysaccharide ; protein ; activated sludge ; chromatography ; community composition ; FTIR spectroscopy ; functional group ; microbial activity ; polymer ; polymerization ; protein ; substrate ; wastewater treatment ; X-ray spectroscopy ; activated sludge ; Article ; carbon source ; chemical bond ; chemical composition ; chemical oxygen demand ; hydrolysis ; polymerization ; priority journal ; protein content ; size exclusion chromatography ; sludge treatment ; waste water treatment plant ; chemistry ; polymerization ; sewage ; spectroscopy ; waste water ; Polymerization ; Polymers ; Polysaccharides ; Proteins ; Sewage ; Spectrum Analysis ; Waste Water
English Abstract: Characteristics of extracellular polymeric substances (EPS) in activated sludge strongly depend on wastewater substrates. Proteinaceous substrates (ProS) present in heterogeneous polymeric form are intrinsic and important parts of wastewater substrates for microorganisms in activated sludge systems. However, correlations between ProS and characteristics of EPS are scarce. This study systematically explored the impacts of monomeric (Mono-), low polymeric (LoP-) and high polymeric (HiP-) ProS on compositions and functional groups of EPS in activated sludge. The results showed that the change of polymerization degree of ProS significantly altered the composition of EPS. Compared to EPSMono-ProS, the proportion of proteins in EPSLoP-ProS and EPSHiP-ProS increased by 12.8% and 27.7%, respectively, while that of polysaccharides decreased by 22.9% and 63.6%, respectively. Moreover, the proportion of humic compounds in EPSLoP-ProS and EPSHiP-ProS were ∼6 and ∼16–fold higher than that in EPSMono-ProS, respectively. The accumulation of humic compounds in EPS increased the unsaturation degree of EPS molecules, and thereby reduced the energy requirement for electrons transition of amide bonds and aromatic groups. Size exclusion chromatography (SEC) analyses detected more molecular clusters in EPSHiP-ProS, indicating more complex composition of EPS in HiP-ProS fed activated sludge. Spectroscopic characterization revealed the dominance of hydrocarbon, protein, polysaccharide and aromatic associated bonds in all three EPS. Nevertheless, with the increase of polymerization degree of ProS, the protein associated bonds (such as [sbnd]CO[sbnd]NH[sbnd], C[dbnd]O, N[sbnd]C, N[sbnd]H) increased, while the polysaccharide associated bonds (such as C[sbnd]O[sbnd]C, C[sbnd]O[sbnd]H, O[dbnd]C[sbnd]OH) decreased. This paper paves a path to understand the role of ProS in affecting the production and characteristics of EPS in biological wastewater treatment systems. © 2017 Elsevier Ltd
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被引频次[WOS]:57   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/113088
Appears in Collections:气候减缓与适应

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Affiliation: College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Hangzhou, Zhejiang 310014, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China

Recommended Citation:
Wang B.-B.,Liu X.-T.,Chen J.-M.,et al. Composition and functional group characterization of extracellular polymeric substances (EPS) in activated sludge: the impacts of polymerization degree of proteinaceous substrates[J]. Water Research,2018-01-01,129
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