Contemporary application of microbubble technology in water treatment

Sarita S. Nair, Ruben Pinedo-Cuenca, Tony Stubbs, Seth J. Davis, Poo Balan Ganesan, Faik Hamad

Research output: Contribution to journalReview articlepeer-review

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Microbubble (MB) technology constitutes a suite of promising low-cost technologies with potential applications in various sectors. Microbubbles (MBs) are tiny gas bubbles with diameters in the micrometre range of 10–100 μm. Along with their small size, they share special characteristics like slow buoyancy, large gas–liquid interfacial area and high mass-transfer efficiency. Initially, the review examines the key dissimilarities among the different types of microbubble generators (MBG) towards economic large-scale production of MBs. The applications of MBs to explore their effectiveness at different stages of wastewater treatment extending from aeration, separation/ flotation, ozonation, disinfection and other processes are investigated. A summary of the recent advances of MBs in real and synthetic wastewater treatment, existing research gaps, and limitations in upscaling of the technology, conclusion and future recommendations is detailed. A critical analysis of the energetics and treatment cost of combined approaches of MB technology with other advanced oxidation processes (AOPs) is carried out highlighting the potential applicability of hybrid technology in large-scale wastewater treatment.

Original languageEnglish
Pages (from-to)2138-2156
Number of pages19
JournalWater Science and Technology
Issue number9
Publication statusPublished - 1 Nov 2022


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