A novel membrane-based bubble generator for oxygen dissolution in water

•A novel membrane-based bubble generator (MBG) is proposed.•The MBG system could suck air at the rates of up to 5.46 L/min.•The oxygen dissolution efficiency was up to 1.48 kgO2/kWh.•The energy efficiency of the MBG system was comparable with commercial oxygenators. Dissolved oxygen is one of the le...

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Bibliographic Details
Published in:Chemical engineering and processing 2022-05, Vol.175, p.108938, Article 108938
Main Authors: Mohd Rasdi, Wan Noor Athina, Bilad, Muhammad Roil, Shamsuddin, Norazanita, Wirzal, Mohd Dzul Hakim, Nordin, Nik Abdul Hadi Md, Budhijanto, Wiratni, Biyanto, Totok Ruki, Khan, Asim Laeeq
Format: Article
Language:English
Subjects:
Dissolved oxygen
Microbubbles
Oxygen dissolution
Specific energy consumption
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Summary:•A novel membrane-based bubble generator (MBG) is proposed.•The MBG system could suck air at the rates of up to 5.46 L/min.•The oxygen dissolution efficiency was up to 1.48 kgO2/kWh.•The energy efficiency of the MBG system was comparable with commercial oxygenators. Dissolved oxygen is one of the leading indicators of aquatic quality. This study explored a membrane-based bubble generator (MBG) for oxygen dissolution in water. It is achieved by creating negative pressures to suck the air through a thin, porous film and forming bubbles in liquid water. Both airflow and liquid flow rates played essential roles in forming the bubbles. The highest oxygen dissolution energy efficiency of 1.48 kgO2/kWh was achieved under free-flowing air at corresponding air and liquid velocities of 4.87 L/min and 2.46 m/s, respectively. The obtained oxygen dissolution energy efficiencies were comparable with established commercial oxygenators. The results revealed a promising application of porous membranes in MBG as a potential energy-efficient oxygen dissolution technology. [Display omitted]
ISSN:0255-2701
1873-3204
DOI:10.1016/j.cep.2022.108938