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Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation

In this project, a commercial polytetrafluoroethylene (PTFE) membrane was coated with a thin layer of polyether block amide (PEBAX) via vacuum filtration to improve hydrophilicity and to study the bubble formation. Two parameters, namely PEBAX concentration (of 0–1.5 wt%) and air flow rate (of 0.1–5...

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Autores principales: Shafie, Siti Nur Alwani, Shen, Wong Yoong, Jaymon, Jc Jcy, Nordin, Nik Abdul Hadi Md, Mohamednour, Abdelslam Elsir Elsiddig, Bilad, Muhammad Roil, Kee, Lam Man, Matsuura, Takeshi, Othman, Mohd Hafiz Dzarfan, Jaafar, Juhana, Ismail, Ahmad Fauzi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027748/
https://www.ncbi.nlm.nih.gov/pubmed/35448384
http://dx.doi.org/10.3390/membranes12040414
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author Shafie, Siti Nur Alwani
Shen, Wong Yoong
Jaymon, Jc Jcy
Nordin, Nik Abdul Hadi Md
Mohamednour, Abdelslam Elsir Elsiddig
Bilad, Muhammad Roil
Kee, Lam Man
Matsuura, Takeshi
Othman, Mohd Hafiz Dzarfan
Jaafar, Juhana
Ismail, Ahmad Fauzi
author_facet Shafie, Siti Nur Alwani
Shen, Wong Yoong
Jaymon, Jc Jcy
Nordin, Nik Abdul Hadi Md
Mohamednour, Abdelslam Elsir Elsiddig
Bilad, Muhammad Roil
Kee, Lam Man
Matsuura, Takeshi
Othman, Mohd Hafiz Dzarfan
Jaafar, Juhana
Ismail, Ahmad Fauzi
author_sort Shafie, Siti Nur Alwani
collection PubMed
description In this project, a commercial polytetrafluoroethylene (PTFE) membrane was coated with a thin layer of polyether block amide (PEBAX) via vacuum filtration to improve hydrophilicity and to study the bubble formation. Two parameters, namely PEBAX concentration (of 0–1.5 wt%) and air flow rate (of 0.1–50 mL/s), were varied and their effects on the bubble size formation were investigated. The results show that the PEBAX coating reduced the minimum membrane pore size from 0.46 μm without coating (hereafter called PEBAX0) to 0.25 μm for the membrane coated with 1.5wt% of PEBAX (hereafter called PEBAX1.5). The presence of polar functional groups (N-H and C=O) in PEBAX greatly improved the membrane hydrophilicity from 118° for PEBAX0 to 43.66° for PEBAX1.5. At an air flow rate of 43 mL/s, the equivalent bubble diameter size decreased from 2.71 ± 0.14 cm for PEBAX0 to 1.51 ± 0.02 cm for PEBAX1.5. At the same air flow rate, the frequency of bubble formation increased six times while the effective gas–liquid contact area increased from 47.96 cm(2)/s to 85.6 cm(2)/s. The improved growth of C. vulgaris from 0.6 g/L to 1.3 g/L for PEBAX1.5 also shows the potential of the PEBAX surface coating porous membrane as an air sparger.
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spelling pubmed-90277482022-04-23 Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation Shafie, Siti Nur Alwani Shen, Wong Yoong Jaymon, Jc Jcy Nordin, Nik Abdul Hadi Md Mohamednour, Abdelslam Elsir Elsiddig Bilad, Muhammad Roil Kee, Lam Man Matsuura, Takeshi Othman, Mohd Hafiz Dzarfan Jaafar, Juhana Ismail, Ahmad Fauzi Membranes (Basel) Article In this project, a commercial polytetrafluoroethylene (PTFE) membrane was coated with a thin layer of polyether block amide (PEBAX) via vacuum filtration to improve hydrophilicity and to study the bubble formation. Two parameters, namely PEBAX concentration (of 0–1.5 wt%) and air flow rate (of 0.1–50 mL/s), were varied and their effects on the bubble size formation were investigated. The results show that the PEBAX coating reduced the minimum membrane pore size from 0.46 μm without coating (hereafter called PEBAX0) to 0.25 μm for the membrane coated with 1.5wt% of PEBAX (hereafter called PEBAX1.5). The presence of polar functional groups (N-H and C=O) in PEBAX greatly improved the membrane hydrophilicity from 118° for PEBAX0 to 43.66° for PEBAX1.5. At an air flow rate of 43 mL/s, the equivalent bubble diameter size decreased from 2.71 ± 0.14 cm for PEBAX0 to 1.51 ± 0.02 cm for PEBAX1.5. At the same air flow rate, the frequency of bubble formation increased six times while the effective gas–liquid contact area increased from 47.96 cm(2)/s to 85.6 cm(2)/s. The improved growth of C. vulgaris from 0.6 g/L to 1.3 g/L for PEBAX1.5 also shows the potential of the PEBAX surface coating porous membrane as an air sparger. MDPI 2022-04-11 /pmc/articles/PMC9027748/ /pubmed/35448384 http://dx.doi.org/10.3390/membranes12040414 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shafie, Siti Nur Alwani
Shen, Wong Yoong
Jaymon, Jc Jcy
Nordin, Nik Abdul Hadi Md
Mohamednour, Abdelslam Elsir Elsiddig
Bilad, Muhammad Roil
Kee, Lam Man
Matsuura, Takeshi
Othman, Mohd Hafiz Dzarfan
Jaafar, Juhana
Ismail, Ahmad Fauzi
Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title_full Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title_fullStr Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title_full_unstemmed Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title_short Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation
title_sort controlling air bubble formation using hydrophilic microfiltration diffuser for c. vulgaris cultivation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027748/
https://www.ncbi.nlm.nih.gov/pubmed/35448384
http://dx.doi.org/10.3390/membranes12040414
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