Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems
Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4...
Ausführliche Beschreibung
Autor*in: |
Rodriguez-Sanchez, Alejandro [verfasserIn] |
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Englisch |
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2018 |
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Anmerkung: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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Übergeordnetes Werk: |
Enthalten in: Environmental science and pollution research - Springer Berlin Heidelberg, 1994, 26(2018), 1 vom: 07. Nov., Seite 514-527 |
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Übergeordnetes Werk: |
volume:26 ; year:2018 ; number:1 ; day:07 ; month:11 ; pages:514-527 |
Links: |
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DOI / URN: |
10.1007/s11356-018-3608-4 |
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OLC2040536809 |
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520 | |a Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. | ||
650 | 4 | |a Membrane bioreactor | |
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10.1007/s11356-018-3608-4 doi (DE-627)OLC2040536809 (DE-He213)s11356-018-3608-4-p DE-627 ger DE-627 rakwb eng 570 360 333.7 VZ 690 333.7 540 VZ BIODIV DE-30 fid Rodriguez-Sanchez, Alejandro verfasserin (orcid)0000-0001-6647-4944 aut Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. Membrane bioreactor Moving bed membrane bioreactor Salinity wastewater Oligotyping Leyva-Diaz, Juan Carlos aut Muñoz-Palazon, Barbara aut Poyatos, Jose Manuel aut Gonzalez-Lopez, Jesus aut Enthalten in Environmental science and pollution research Springer Berlin Heidelberg, 1994 26(2018), 1 vom: 07. Nov., Seite 514-527 (DE-627)171335805 (DE-600)1178791-0 (DE-576)038875101 0944-1344 nnns volume:26 year:2018 number:1 day:07 month:11 pages:514-527 https://doi.org/10.1007/s11356-018-3608-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4277 AR 26 2018 1 07 11 514-527 |
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10.1007/s11356-018-3608-4 doi (DE-627)OLC2040536809 (DE-He213)s11356-018-3608-4-p DE-627 ger DE-627 rakwb eng 570 360 333.7 VZ 690 333.7 540 VZ BIODIV DE-30 fid Rodriguez-Sanchez, Alejandro verfasserin (orcid)0000-0001-6647-4944 aut Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. Membrane bioreactor Moving bed membrane bioreactor Salinity wastewater Oligotyping Leyva-Diaz, Juan Carlos aut Muñoz-Palazon, Barbara aut Poyatos, Jose Manuel aut Gonzalez-Lopez, Jesus aut Enthalten in Environmental science and pollution research Springer Berlin Heidelberg, 1994 26(2018), 1 vom: 07. Nov., Seite 514-527 (DE-627)171335805 (DE-600)1178791-0 (DE-576)038875101 0944-1344 nnns volume:26 year:2018 number:1 day:07 month:11 pages:514-527 https://doi.org/10.1007/s11356-018-3608-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4277 AR 26 2018 1 07 11 514-527 |
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10.1007/s11356-018-3608-4 doi (DE-627)OLC2040536809 (DE-He213)s11356-018-3608-4-p DE-627 ger DE-627 rakwb eng 570 360 333.7 VZ 690 333.7 540 VZ BIODIV DE-30 fid Rodriguez-Sanchez, Alejandro verfasserin (orcid)0000-0001-6647-4944 aut Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. Membrane bioreactor Moving bed membrane bioreactor Salinity wastewater Oligotyping Leyva-Diaz, Juan Carlos aut Muñoz-Palazon, Barbara aut Poyatos, Jose Manuel aut Gonzalez-Lopez, Jesus aut Enthalten in Environmental science and pollution research Springer Berlin Heidelberg, 1994 26(2018), 1 vom: 07. Nov., Seite 514-527 (DE-627)171335805 (DE-600)1178791-0 (DE-576)038875101 0944-1344 nnns volume:26 year:2018 number:1 day:07 month:11 pages:514-527 https://doi.org/10.1007/s11356-018-3608-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4277 AR 26 2018 1 07 11 514-527 |
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10.1007/s11356-018-3608-4 doi (DE-627)OLC2040536809 (DE-He213)s11356-018-3608-4-p DE-627 ger DE-627 rakwb eng 570 360 333.7 VZ 690 333.7 540 VZ BIODIV DE-30 fid Rodriguez-Sanchez, Alejandro verfasserin (orcid)0000-0001-6647-4944 aut Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. Membrane bioreactor Moving bed membrane bioreactor Salinity wastewater Oligotyping Leyva-Diaz, Juan Carlos aut Muñoz-Palazon, Barbara aut Poyatos, Jose Manuel aut Gonzalez-Lopez, Jesus aut Enthalten in Environmental science and pollution research Springer Berlin Heidelberg, 1994 26(2018), 1 vom: 07. Nov., Seite 514-527 (DE-627)171335805 (DE-600)1178791-0 (DE-576)038875101 0944-1344 nnns volume:26 year:2018 number:1 day:07 month:11 pages:514-527 https://doi.org/10.1007/s11356-018-3608-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4277 AR 26 2018 1 07 11 514-527 |
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10.1007/s11356-018-3608-4 doi (DE-627)OLC2040536809 (DE-He213)s11356-018-3608-4-p DE-627 ger DE-627 rakwb eng 570 360 333.7 VZ 690 333.7 540 VZ BIODIV DE-30 fid Rodriguez-Sanchez, Alejandro verfasserin (orcid)0000-0001-6647-4944 aut Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. Membrane bioreactor Moving bed membrane bioreactor Salinity wastewater Oligotyping Leyva-Diaz, Juan Carlos aut Muñoz-Palazon, Barbara aut Poyatos, Jose Manuel aut Gonzalez-Lopez, Jesus aut Enthalten in Environmental science and pollution research Springer Berlin Heidelberg, 1994 26(2018), 1 vom: 07. Nov., Seite 514-527 (DE-627)171335805 (DE-600)1178791-0 (DE-576)038875101 0944-1344 nnns volume:26 year:2018 number:1 day:07 month:11 pages:514-527 https://doi.org/10.1007/s11356-018-3608-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-FOR SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_252 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4277 AR 26 2018 1 07 11 514-527 |
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influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems |
title_auth |
Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems |
abstract |
Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
abstractGer |
Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
abstract_unstemmed |
Abstract A membrane bioreactor and two hybrid moving bed bioreactor-membrane bioreactors were operated for the treatment of variable salinity wastewater, changing in cycles of 6-h wastewater base salinity and 6-h maximum salinity (4.5 and 8.5 mS $ cm^{−1} $ electric conductivity, which relate to 2.4 and 4.8 g $ L^{−1} $ NaCl, respectively), under different hydraulic retention times (6, 9.5, and 12 h) and total solids concentrations (2500 and 3500 mg $ L^{−1} $). The evaluation of the performance of the systems showed that COD removal performance was unaffected by salinity conditions, while $ BOD_{5} $ and TN removals were significantly higher in the low-salinity scenario. The microbial community structure showed differences with respect to salinity conditions for Eukarya, suggesting their higher sensitivity for salinity with respect to Prokarya, which were similar at both salinity scenarios. Nevertheless, the intra-OTU distribution of consistently represented OTUs of Eukarya and Prokarya was affected by the different salinity maximums. Multivariate redundancy analyses showed that several genera such as Amphiplicatus (0.01–5.90%), Parvibaculum (0.27–1.19%), Thiothrix (0.30–1.19%), Rhodanobacter (2.81–5.85%), Blastocatella (0.21–2.01%), and Nitrobacter (0.80–0.99%) were positively correlated with $ BOD_{5} $ and TN removal, and the ecological roles of these were proposed. All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. The results obtained will be of interest for future design and operation of salinity wastewater treatment systems particularly because little is known on the effect of variable salinity conditions in wastewater treatment. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems |
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All these genera were substantially more represented under low-salinity conditions (10–500% higher relative abundance), demonstrating that they might be of importance for the treatment of variable salinity wastewater. Evaluation of Eukarya OTUs showed that many of them lack a consistent taxonomic classification, which highlights the lack of knowledge of the diversity and ecological role of Eukaryotes in saline wastewater treatment processes. 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