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Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability
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| Zeitschriftentitel: | Membranes |
|---|---|
| Personen und Körperschaften: | , , , , , , |
| In: | Membranes, 9, 2019, 7, S. 85 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
MDPI AG
|
| Schlagwörter: |
| author_facet |
Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng |
|---|---|
| author |
Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng |
| spellingShingle |
Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng Membranes Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability Filtration and Separation Chemical Engineering (miscellaneous) Process Chemistry and Technology |
| author_sort |
yan, linlin |
| spelling |
Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng 2077-0375 MDPI AG Filtration and Separation Chemical Engineering (miscellaneous) Process Chemistry and Technology http://dx.doi.org/10.3390/membranes9070085 <jats:p>In this study, the characteristics of membrane foulants were analyzed with regard to morphology, composition, and aggregation ability during the three stages of transmembrane pressure (TMP) development (fast–slow–fast rise in TMP) in a steady operational membrane bioreactor (MBR). The results obtained show that the fouling layer at the slow TMP-increase stage possessed a higher average roughness (71.27 nm) and increased fractal dimension (2.33), which resulted in a low membrane fouling rate (0.87 kPa/d). A higher extracellular DNA (eDNA) proportion (26.12%) in the extracellular polymeric substances (EPS) resulted in both higher zeta potential (-23.3 mV) and higher hydrophobicity (82.3%) for initial foulants, which induced and increased the protein proportion in the subsequent fouling layer (74.11%). Furthermore, the main composition of the EPS shifted from protein toward polysaccharide dominance in the final fouling layer. The aggregation test confirmed that eDNA was essential for foulant aggregation in the initial fouling layer, whereas ion interaction significantly affected foulant aggregation in the final fouling layer.</jats:p> Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability Membranes |
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10.3390/membranes9070085 |
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MDPI AG, 2019 |
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| title |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_unstemmed |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_full |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_fullStr |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_full_unstemmed |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_short |
Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_sort |
characterization of the fouling layer on the membrane surface in a membrane bioreactor: evolution of the foulants’ composition and aggregation ability |
| topic |
Filtration and Separation Chemical Engineering (miscellaneous) Process Chemistry and Technology |
| url |
http://dx.doi.org/10.3390/membranes9070085 |
| publishDate |
2019 |
| physical |
85 |
| description |
<jats:p>In this study, the characteristics of membrane foulants were analyzed with regard to morphology, composition, and aggregation ability during the three stages of transmembrane pressure (TMP) development (fast–slow–fast rise in TMP) in a steady operational membrane bioreactor (MBR). The results obtained show that the fouling layer at the slow TMP-increase stage possessed a higher average roughness (71.27 nm) and increased fractal dimension (2.33), which resulted in a low membrane fouling rate (0.87 kPa/d). A higher extracellular DNA (eDNA) proportion (26.12%) in the extracellular polymeric substances (EPS) resulted in both higher zeta potential (-23.3 mV) and higher hydrophobicity (82.3%) for initial foulants, which induced and increased the protein proportion in the subsequent fouling layer (74.11%). Furthermore, the main composition of the EPS shifted from protein toward polysaccharide dominance in the final fouling layer. The aggregation test confirmed that eDNA was essential for foulant aggregation in the initial fouling layer, whereas ion interaction significantly affected foulant aggregation in the final fouling layer.</jats:p> |
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| author | Yan, Linlin, Li, Ruixue, Song, Yu, Jia, Yanping, Li, Zheng, Song, Lianfa, Zhang, Haifeng |
| author_facet | Yan, Linlin, Li, Ruixue, Song, Yu, Jia, Yanping, Li, Zheng, Song, Lianfa, Zhang, Haifeng, Yan, Linlin, Li, Ruixue, Song, Yu, Jia, Yanping, Li, Zheng, Song, Lianfa, Zhang, Haifeng |
| author_sort | yan, linlin |
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| description | <jats:p>In this study, the characteristics of membrane foulants were analyzed with regard to morphology, composition, and aggregation ability during the three stages of transmembrane pressure (TMP) development (fast–slow–fast rise in TMP) in a steady operational membrane bioreactor (MBR). The results obtained show that the fouling layer at the slow TMP-increase stage possessed a higher average roughness (71.27 nm) and increased fractal dimension (2.33), which resulted in a low membrane fouling rate (0.87 kPa/d). A higher extracellular DNA (eDNA) proportion (26.12%) in the extracellular polymeric substances (EPS) resulted in both higher zeta potential (-23.3 mV) and higher hydrophobicity (82.3%) for initial foulants, which induced and increased the protein proportion in the subsequent fouling layer (74.11%). Furthermore, the main composition of the EPS shifted from protein toward polysaccharide dominance in the final fouling layer. The aggregation test confirmed that eDNA was essential for foulant aggregation in the initial fouling layer, whereas ion interaction significantly affected foulant aggregation in the final fouling layer.</jats:p> |
| doi_str_mv | 10.3390/membranes9070085 |
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| mega_collection | MDPI AG (CrossRef) |
| physical | 85 |
| publishDate | 2019 |
| publishDateSort | 2019 |
| publisher | MDPI AG |
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| series | Membranes |
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| spelling | Yan, Linlin Li, Ruixue Song, Yu Jia, Yanping Li, Zheng Song, Lianfa Zhang, Haifeng 2077-0375 MDPI AG Filtration and Separation Chemical Engineering (miscellaneous) Process Chemistry and Technology http://dx.doi.org/10.3390/membranes9070085 <jats:p>In this study, the characteristics of membrane foulants were analyzed with regard to morphology, composition, and aggregation ability during the three stages of transmembrane pressure (TMP) development (fast–slow–fast rise in TMP) in a steady operational membrane bioreactor (MBR). The results obtained show that the fouling layer at the slow TMP-increase stage possessed a higher average roughness (71.27 nm) and increased fractal dimension (2.33), which resulted in a low membrane fouling rate (0.87 kPa/d). A higher extracellular DNA (eDNA) proportion (26.12%) in the extracellular polymeric substances (EPS) resulted in both higher zeta potential (-23.3 mV) and higher hydrophobicity (82.3%) for initial foulants, which induced and increased the protein proportion in the subsequent fouling layer (74.11%). Furthermore, the main composition of the EPS shifted from protein toward polysaccharide dominance in the final fouling layer. The aggregation test confirmed that eDNA was essential for foulant aggregation in the initial fouling layer, whereas ion interaction significantly affected foulant aggregation in the final fouling layer.</jats:p> Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability Membranes |
| spellingShingle | Yan, Linlin, Li, Ruixue, Song, Yu, Jia, Yanping, Li, Zheng, Song, Lianfa, Zhang, Haifeng, Membranes, Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability, Filtration and Separation, Chemical Engineering (miscellaneous), Process Chemistry and Technology |
| title | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_full | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_fullStr | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_full_unstemmed | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_short | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| title_sort | characterization of the fouling layer on the membrane surface in a membrane bioreactor: evolution of the foulants’ composition and aggregation ability |
| title_unstemmed | Characterization of the Fouling Layer on the Membrane Surface in a Membrane Bioreactor: Evolution of the Foulants’ Composition and Aggregation Ability |
| topic | Filtration and Separation, Chemical Engineering (miscellaneous), Process Chemistry and Technology |
| url | http://dx.doi.org/10.3390/membranes9070085 |