Membrane fouling monitoring by 3ω sensing
Abstract Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of membrane fouling can potentially be used to reduce operation cost by optimizing operational parameters and cleaning conditions. In this study, a platinum wire with a d...
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-09-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-42337-1 |
| _version_ | 1797452770753642496 |
|---|---|
| author | Mads Koustrup Jørgensen Frederikke Kildeberg Paulsen Anders Bentien Astrid Ræbild Kjul Maiken Poulsen Louise Mailund Mikkelsen Nikitha Thavaneswaran Simon Abildgaard Hansen Pernille Krogsager Jensen Jacob Andersen David N. Østedgaard-Munck Jan Dimon Bendtsen Morten Lykkegaard Christensen |
| author_facet | Mads Koustrup Jørgensen Frederikke Kildeberg Paulsen Anders Bentien Astrid Ræbild Kjul Maiken Poulsen Louise Mailund Mikkelsen Nikitha Thavaneswaran Simon Abildgaard Hansen Pernille Krogsager Jensen Jacob Andersen David N. Østedgaard-Munck Jan Dimon Bendtsen Morten Lykkegaard Christensen |
| author_sort | Mads Koustrup Jørgensen |
| collection | DOAJ |
| description | Abstract Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of membrane fouling can potentially be used to reduce operation cost by optimizing operational parameters and cleaning conditions. In this study, a platinum wire with a diameter of 20 µm was attached to the surface of a ceramic ultrafiltration membrane, and by measuring the voltage across the wire while applying an AC current, the amplitude of the third harmonic wave, the so-called 3ω signal, was obtained. Results showed increasing 3ω signals during formation of fouling layers, which correlates directly to the hydraulic resistance of the formed fouling layer in semi-dead end filtration of polymeric core shell particles and crossflow filtration of diluted milk. This is explained by the insulating effect of the fouling layers which reduces heat convection by crossflow and the different thermal conductivity in the fouling layer compared with the feed. After membrane cleaning, the permeability and the magnitude of the 3ω signal were partly restored, showing that the 3ω method can be used to monitor the effect of cleaning. The frequency of the AC current was varied so it was possible to measure the heat conductivity in the fouling layer (high frequency) and heat convection due to cross-flow (low frequency). This may potentially be used to get information of the type of fouling (heat conductivity) and thickness of the fouling layer (AC frequency where heat conductivity becomes dominating). |
| first_indexed | 2024-03-09T15:13:29Z |
| format | Article |
| id | doaj.art-3636f062fb52489f9b109b5b75c18306 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T15:13:29Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-3636f062fb52489f9b109b5b75c183062023-11-26T13:12:06ZengNature PortfolioScientific Reports2045-23222023-09-0113111110.1038/s41598-023-42337-1Membrane fouling monitoring by 3ω sensingMads Koustrup Jørgensen0Frederikke Kildeberg Paulsen1Anders Bentien2Astrid Ræbild Kjul3Maiken Poulsen4Louise Mailund Mikkelsen5Nikitha Thavaneswaran6Simon Abildgaard Hansen7Pernille Krogsager Jensen8Jacob Andersen9David N. Østedgaard-Munck10Jan Dimon Bendtsen11Morten Lykkegaard Christensen12Center for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityDepartment of Biological and Chemical Engineering, Aarhus UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityLiqTech International A/SDepartment of Electronic Systems, Aalborg UniversityCenter for Membrane Technology, Department of Chemistry and Bioscience, Aalborg UniversityAbstract Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of membrane fouling can potentially be used to reduce operation cost by optimizing operational parameters and cleaning conditions. In this study, a platinum wire with a diameter of 20 µm was attached to the surface of a ceramic ultrafiltration membrane, and by measuring the voltage across the wire while applying an AC current, the amplitude of the third harmonic wave, the so-called 3ω signal, was obtained. Results showed increasing 3ω signals during formation of fouling layers, which correlates directly to the hydraulic resistance of the formed fouling layer in semi-dead end filtration of polymeric core shell particles and crossflow filtration of diluted milk. This is explained by the insulating effect of the fouling layers which reduces heat convection by crossflow and the different thermal conductivity in the fouling layer compared with the feed. After membrane cleaning, the permeability and the magnitude of the 3ω signal were partly restored, showing that the 3ω method can be used to monitor the effect of cleaning. The frequency of the AC current was varied so it was possible to measure the heat conductivity in the fouling layer (high frequency) and heat convection due to cross-flow (low frequency). This may potentially be used to get information of the type of fouling (heat conductivity) and thickness of the fouling layer (AC frequency where heat conductivity becomes dominating).https://doi.org/10.1038/s41598-023-42337-1 |
| spellingShingle | Mads Koustrup Jørgensen Frederikke Kildeberg Paulsen Anders Bentien Astrid Ræbild Kjul Maiken Poulsen Louise Mailund Mikkelsen Nikitha Thavaneswaran Simon Abildgaard Hansen Pernille Krogsager Jensen Jacob Andersen David N. Østedgaard-Munck Jan Dimon Bendtsen Morten Lykkegaard Christensen Membrane fouling monitoring by 3ω sensing Scientific Reports |
| title | Membrane fouling monitoring by 3ω sensing |
| title_full | Membrane fouling monitoring by 3ω sensing |
| title_fullStr | Membrane fouling monitoring by 3ω sensing |
| title_full_unstemmed | Membrane fouling monitoring by 3ω sensing |
| title_short | Membrane fouling monitoring by 3ω sensing |
| title_sort | membrane fouling monitoring by 3ω sensing |
| url | https://doi.org/10.1038/s41598-023-42337-1 |
| work_keys_str_mv | AT madskoustrupjørgensen membranefoulingmonitoringby3ōsensing AT frederikkekildebergpaulsen membranefoulingmonitoringby3ōsensing AT andersbentien membranefoulingmonitoringby3ōsensing AT astridræbildkjul membranefoulingmonitoringby3ōsensing AT maikenpoulsen membranefoulingmonitoringby3ōsensing AT louisemailundmikkelsen membranefoulingmonitoringby3ōsensing AT nikithathavaneswaran membranefoulingmonitoringby3ōsensing AT simonabildgaardhansen membranefoulingmonitoringby3ōsensing AT pernillekrogsagerjensen membranefoulingmonitoringby3ōsensing AT jacobandersen membranefoulingmonitoringby3ōsensing AT davidnøstedgaardmunck membranefoulingmonitoringby3ōsensing AT jandimonbendtsen membranefoulingmonitoringby3ōsensing AT mortenlykkegaardchristensen membranefoulingmonitoringby3ōsensing |