Assessment of dissolved organic matter fluorescence PARAFAC components before and after coagulation–filtration in a full scale water treatment plant

Sanchez, Nancy P.; Skeriotis, Andrew T.; Miller, Christopher M.

doi:10.1016/j.watres.2012.12.032

Cited by 150 publications

(83 citation statements)

References 51 publications

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“…And all FI of Com.2 were higher than that of Com.1, indicating that tyrosine protein-like substances presented the main abundant compounds of released matters, the same results could be found in previous literature [14]. As the protein-like substances in DOMs must be released from either EPSs or intracellular materials, and were relatively easy to be biodegraded [42,45], the pretreatment methods applied, especially the integration method, were efficient for WAS hydrolysis, which closely related to WAS acidification.…”

Section: Eem Fluorescence Spectra Analysis Of Epsssupporting

confidence: 75%

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

Yang

Wang

et al. 2016

Chemical Engineering Journal

100

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Short-term fermentation for SCFAs production from WAS had been proposed. RL pretreatment enhanced WAS hydrolysis/acidification under alkaline conditions. Role and significance of EPSs had been investigated. The cumulative SCFAs were better fitted with pseudo-first-order kinetic model. RL + initial pH 10 caused positive synergies on anaerobic fermentation process. a r t i c l e i n f o b s t r a c tShort-chain fatty acids (SCFAs), preferred carbon source for enhanced biological nutrients removal system, can be produced from anaerobic fermentation of waste activated sludge (WAS). Hydrolysis is known as the rate-limiting step for SCFAs production. This study presents a novel technology using rhamnolipid (RL) pretreatment connected alkaline anaerobic fermentation to enhance SCFAs production. Experiment results showed that the integration treatments performed significant enhancement of SCFAs production, and the fermentation time was remarkably shortened. The maximum SCFAs production, 378 mg COD/g VSS (volatile suspended solid), reached at 72-h fermentation time under 0.2 g RL/g TSS (total suspended solid) and initial pH 10 treatment, which was 4.31, 1.32 and 1.24 times higher than that of control, initial pH 10 and 0.2 g RL/g TSS treatment, respectively. The mechanism study showed that integration treatments could enhance the release of constituents from the cells and/or extracellular polymeric substances to suspension, and hydrolysis rate constant was improved greatly in integration treatment, 8.68, 2.14 and 1.55 times higher than that of control, sole RL and initial pH 10 treatments, respectively. The results suggested that positive synergy led to improvement of WAS solubilization and SCFAs production under integration conditions. The pseudo-first-order model was successfully built to present the SCFAs accumulation. Therefore, the integration method in this work was a promising technology for SCFAs production enhancement from WAS.

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Section: Eem Fluorescence Spectra Analysis Of Epsssupporting

confidence: 75%

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

Yang

Wang

et al. 2016

Chemical Engineering Journal

100

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“…Component C4 (λex/λem= <240/340 and 295/340) was relatively rarely reported in published literature and it was mainly associated with amino acids and biologically labile matter produced in aquatic environments [42,44,47]. Finally, protein and tryptophan-like fluorescing compounds observed in prior studies are associated with components C5 (λex/λem= <240/330 and 275/330) [18,[42][43][44]48]. …”

Section: Behavior Of Pharmaceuticals and Personal Care Productsmentioning

confidence: 94%

Removal of organic carbon, nitrogen, emerging contaminants and fluorescing organic matter in different constructed wetland configurations

Sgroi

Pelissari

Roccaro

et al. 2018

Chemical Engineering Journal

120

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The elimination of organic carbon, nitrogen, five emerging organic contaminants (EOCs) and fluorescence signature was evaluated in two treatment lines comprising different constructed wetland (CW) configurations: (i) partially saturated vertical subsurface flow (SVF) wetland (treatment line 1) and (ii) unsaturated vertical subsurface flow (UVF), horizontal subsurface flow (HF) and free water surface (FWS) wetlands in series (treatment line 2). Results showed important differences between the different CW configurations. The highest removal of BOD5 (81%), COD (67%), TOC (72%) and fluorescing organic matter were observed in the UVF wetland, whereas the HF and FWS wetlands were the most efficient units for total nitrogen removal (60 and 69%, respectively).The SVF wetland showed a greater performance in the reduction of total nitrogen than the UVF bed (52 vs 35%). In addition, the SVF wetland exhibited a higher removal of the EOCs caffeine (95 vs 90%), trimethoprim (99 vs 87%) and sulfamethoxazole (64 vs 4%), as opposed to DEET (34 vs 63%), whose removal was superior in the UVF unit. Sucralose was negligibly removed in all the CWs. PARAFAC analysis of fluorescence measurements revealed that the proteinaceous tryptophan-like fluorescent component was the most highly removed one in all the investigated CWs (>28%) and, particularly, in the UVF wetland (66%), whereas humic and fulvic-like components resulted recalcitrant to decomposition. Increases of fluorescence intensities were often observed for fulvic-like substances in CWs operating with saturation of the bed, and these were particularly relevant in the SVF unit. Finally, important correlations (r>0.7) between the tryptophanlike fluorescent component and the water quality parameters COD and BOD5 suggest fluorescence spectroscopy as an useful monitoring tool for water treatment efficiency in CW systems.

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“…PARAFAC enables the mathematical separation of chemically independent, but spectrally overlapping fluorescence components, allowing a much more quantitative analysis of EEM data than by merely visual inspection. EEM-PARAFAC has proved a suitable approach for identifying the major foulants in tertiary filtration, monitoring removal of organic matter across drinking water plant and water recycling plant, and characterizing the interactions between dissolved organic matter and trace metals (Yamashita and Jaffé, 2008;Hambly et al, 2010;Henderson et al, 2011;Sanchez et al, 2013). All of these applications above indicated the robustness of this tool in tracing subtle changes of organic components in aquatic system.…”

Section: Introductionmentioning

confidence: 99%

Relationship between soluble microbial products (SMP) and effluent organic matter (EfOM): Characterized by fluorescence excitation emission matrix coupled with parallel factor analysis

Sun

et al. 2015

Chemosphere

122

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Assessment of dissolved organic matter fluorescence PARAFAC components before and after coagulation–filtration in a full scale water treatment plant

Cited by 150 publications

References 51 publications

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

Removal of organic carbon, nitrogen, emerging contaminants and fluorescing organic matter in different constructed wetland configurations

Relationship between soluble microbial products (SMP) and effluent organic matter (EfOM): Characterized by fluorescence excitation emission matrix coupled with parallel factor analysis

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