Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery
Primary recovery of surfactin from precipitation-pretreated fermentation broths of <i>Bacillus subtilis</i> ATCC 21332 culture by one-stage dead-end and cross-flow ultrafiltration (UF) was studied. Dead-end experiments were first performed to select suitable conditions, including the amo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/11/1057 |
| _version_ | 1797467318121398272 |
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| author | Mai Lien Tran Ying-Shr Chen Ruey-Shin Juang |
| author_facet | Mai Lien Tran Ying-Shr Chen Ruey-Shin Juang |
| author_sort | Mai Lien Tran |
| collection | DOAJ |
| description | Primary recovery of surfactin from precipitation-pretreated fermentation broths of <i>Bacillus subtilis</i> ATCC 21332 culture by one-stage dead-end and cross-flow ultrafiltration (UF) was studied. Dead-end experiments were first performed to select suitable conditions, including the amount of added ethanol—a micelle-destabilizing solvent (0–70 vol%), type (polyethersulfone, polyacrylonitrile, poly(vinylidene fluoride)) and molecular-weight cut-off (MWCO, 30–100 kDa) of the membrane in the surfactin concentration range of 0.25–1.23 g/L. Then, the cross-flow UF experiments were conducted to check the recovery performance in the ranges of feed surfactin concentration of 1.13–2.67 g/L, flow velocity of 0.025–0.05 m/s, and transmembrane pressure of 40–100 kPa. The Hermia model was also used to clarify membrane fouling mechanisms. Finally, three cleaning agents and two in situ cleaning ways (flush and back-flush) were selected to regain the permeate flux. As for the primary recovery of surfactin from the permeate in cross-flow UF, a polyethersulfone membrane with 100-kDa MWCO was suggested, and the NaOH solution at pH 11 was used for membrane flushing. |
| first_indexed | 2024-03-09T18:50:55Z |
| format | Article |
| id | doaj.art-772b03b8e1924760b9ae5752abdc8683 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T18:50:55Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-772b03b8e1924760b9ae5752abdc86832023-11-24T05:48:25ZengMDPI AGMembranes2077-03752022-10-011211105710.3390/membranes12111057Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant RecoveryMai Lien Tran0Ying-Shr Chen1Ruey-Shin Juang2Institute of Environmental Science, Engineering and Management, Industrial University of Ho Chi Minh City, Ho Chi Minh City 700000, VietnamDepartment of Chemical and Materials Engineering, Chang Gung University, Guishan, Taoyuan 33302, TaiwanDepartment of Chemical and Materials Engineering, Chang Gung University, Guishan, Taoyuan 33302, TaiwanPrimary recovery of surfactin from precipitation-pretreated fermentation broths of <i>Bacillus subtilis</i> ATCC 21332 culture by one-stage dead-end and cross-flow ultrafiltration (UF) was studied. Dead-end experiments were first performed to select suitable conditions, including the amount of added ethanol—a micelle-destabilizing solvent (0–70 vol%), type (polyethersulfone, polyacrylonitrile, poly(vinylidene fluoride)) and molecular-weight cut-off (MWCO, 30–100 kDa) of the membrane in the surfactin concentration range of 0.25–1.23 g/L. Then, the cross-flow UF experiments were conducted to check the recovery performance in the ranges of feed surfactin concentration of 1.13–2.67 g/L, flow velocity of 0.025–0.05 m/s, and transmembrane pressure of 40–100 kPa. The Hermia model was also used to clarify membrane fouling mechanisms. Finally, three cleaning agents and two in situ cleaning ways (flush and back-flush) were selected to regain the permeate flux. As for the primary recovery of surfactin from the permeate in cross-flow UF, a polyethersulfone membrane with 100-kDa MWCO was suggested, and the NaOH solution at pH 11 was used for membrane flushing.https://www.mdpi.com/2077-0375/12/11/1057fouling analysisone-stage ultrafiltrationprimary recoverysurfactinpretreated fermentation liquors |
| spellingShingle | Mai Lien Tran Ying-Shr Chen Ruey-Shin Juang Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery Membranes fouling analysis one-stage ultrafiltration primary recovery surfactin pretreated fermentation liquors |
| title | Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery |
| title_full | Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery |
| title_fullStr | Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery |
| title_full_unstemmed | Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery |
| title_short | Fouling Analysis in One-Stage Ultrafiltration of Precipitation-Treated <i>Bacillus subtilis</i> Fermentation Liquors for Biosurfactant Recovery |
| title_sort | fouling analysis in one stage ultrafiltration of precipitation treated i bacillus subtilis i fermentation liquors for biosurfactant recovery |
| topic | fouling analysis one-stage ultrafiltration primary recovery surfactin pretreated fermentation liquors |
| url | https://www.mdpi.com/2077-0375/12/11/1057 |
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