Tracking pollutants in a municipal sewage network impairing the operation of a wastewater treatment plant
Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved..
This work provides a screening of organic contaminants and characterization of the dissolved organic matter in the sewer network until the municipal wastewater treatment plant (WWTP), identifying the network areas with a higher degree of contamination and their impact on the WWTP performance, particularly in the activated sludge reactor. Three monitoring campaigns were carried out at six selected locations of the sewage system (PVZ-1, PVZ-2, PS-F, PS-VC, CP-VC, and PS-T), influent (WWTPINF) and effluent (WWTPEFF) of the WWTP. Advanced analytical techniques were employed, namely excitation/emission matrix fluorescence-parallel factor analysis (EEM-PARAFAC), size exclusion chromatography with organic carbon detector (SEC-OCD), and liquid chromatography with high-resolution-mass spectrometric detection (LC-HRMS). EEM-PARAFAC showed higher fluorescence intensity for the protein-like component (C2), particularly at CP-VC (near seafood industries) associated with the presence of surfactants (~50 mg/L). SEC-OCD highlighted the WWTP efficiency in removing low molecular weight acids and neutrals. LC-HRMS tentatively identified 108 compounds of emerging concern (CEC) and similar detection patterns were obtained for all wastewater samples, except for PVZ-2 (lower detection), many of which occurred in the effluent. Eight CECs included on relevant Watch-Lists were detected in all WWTPEFF samples. Furthermore, 111 surfactants were detected, the classes more frequently found being alcohol ethoxylates (AEOs), nonylphenol polyethoxylates (NPEOs) and linear alkylbenzene sulphonates (LAS). The continuous presence of LAS and NPEOs allied to surfactants concentrations in the WWTPINF of 15-20 mg/L, with CP-VC location (linked with food industries) as an important contributor, explain the morphological changes in the activated sludge and high LAS content in the dewatered sludge, which may have impacted WWTP performance.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:817 |
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| Enthalten in: |
The Science of the total environment - 817(2022) vom: 15. Apr., Seite 152518 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Sá, Mariana F T [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 04.03.2022 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.scitotenv.2021.152518 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM335308791 |
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| 520 | |a Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved. | ||
| 520 | |a This work provides a screening of organic contaminants and characterization of the dissolved organic matter in the sewer network until the municipal wastewater treatment plant (WWTP), identifying the network areas with a higher degree of contamination and their impact on the WWTP performance, particularly in the activated sludge reactor. Three monitoring campaigns were carried out at six selected locations of the sewage system (PVZ-1, PVZ-2, PS-F, PS-VC, CP-VC, and PS-T), influent (WWTPINF) and effluent (WWTPEFF) of the WWTP. Advanced analytical techniques were employed, namely excitation/emission matrix fluorescence-parallel factor analysis (EEM-PARAFAC), size exclusion chromatography with organic carbon detector (SEC-OCD), and liquid chromatography with high-resolution-mass spectrometric detection (LC-HRMS). EEM-PARAFAC showed higher fluorescence intensity for the protein-like component (C2), particularly at CP-VC (near seafood industries) associated with the presence of surfactants (~50 mg/L). SEC-OCD highlighted the WWTP efficiency in removing low molecular weight acids and neutrals. LC-HRMS tentatively identified 108 compounds of emerging concern (CEC) and similar detection patterns were obtained for all wastewater samples, except for PVZ-2 (lower detection), many of which occurred in the effluent. Eight CECs included on relevant Watch-Lists were detected in all WWTPEFF samples. Furthermore, 111 surfactants were detected, the classes more frequently found being alcohol ethoxylates (AEOs), nonylphenol polyethoxylates (NPEOs) and linear alkylbenzene sulphonates (LAS). The continuous presence of LAS and NPEOs allied to surfactants concentrations in the WWTPINF of 15-20 mg/L, with CP-VC location (linked with food industries) as an important contributor, explain the morphological changes in the activated sludge and high LAS content in the dewatered sludge, which may have impacted WWTP performance | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Contaminants of emerging concern (CEC) | |
| 650 | 4 | |a EEM-PARAFAC analysis | |
| 650 | 4 | |a Industrial pollution hotspots | |
| 650 | 4 | |a LC-QTOF | |
| 650 | 4 | |a Suspect screening | |
| 650 | 4 | |a surfactans | |
| 650 | 7 | |a Environmental Pollutants |2 NLM | |
| 650 | 7 | |a Sewage |2 NLM | |
| 650 | 7 | |a Waste Water |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 700 | 1 | |a Castro, Verónica |e verfasserin |4 aut | |
| 700 | 1 | |a Gomes, Ana I |e verfasserin |4 aut | |
| 700 | 1 | |a Morais, Daniela F S |e verfasserin |4 aut | |
| 700 | 1 | |a Silva Braga, Rui V P S |e verfasserin |4 aut | |
| 700 | 1 | |a Saraiva, Isabel |e verfasserin |4 aut | |
| 700 | 1 | |a Souza-Chaves, Bianca M |e verfasserin |4 aut | |
| 700 | 1 | |a Park, Minkyu |e verfasserin |4 aut | |
| 700 | 1 | |a Fernández-Fernández, Victoria |e verfasserin |4 aut | |
| 700 | 1 | |a Rodil, Rosario |e verfasserin |4 aut | |
| 700 | 1 | |a Montes, Rosa |e verfasserin |4 aut | |
| 700 | 1 | |a Quintana, José Benito |e verfasserin |4 aut | |
| 700 | 1 | |a Vilar, Vítor J P |e verfasserin |4 aut | |
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