Review on swirl-type microbubble generator: Concept, technology, and applications
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Dec 31, 2023
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Abstract
The Microbubble Generator (MBG) is an aeration technology capable of producing micron-sized bubbles. Several researchers have conducted previous studies and developed various types related to the microbubble generator. The swirl-type microbubble generator has demonstrated advantages over other types. It has been widely explored recently due to its simple structure, efficiency in producing micron-sized bubbles, and potential applications across various fields. Therefore, this article reviews recent developments in swirl-type bubble generator research, encompassing the definition of microbubbles, methods for generating microbubbles through experimental and numerical approaches, the performance of microbubble generators, and their applications. Based on optimized geometric parameters combined with appropriate flow conditions, the swirl-type bubble generator is predicted to produce bubbles with controlled sizes and concentrations that meet specific requirements. However, further studies are needed to delineate the fluid-gas interactions comprehensively.
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References
[1] G. P. Galdi, Particles in Flows, 1st ed. Birkhäuser Cham, 2014.
[2] F. T. Katsuine Tabei, Shuka Haruyama, Shuichi Yamaguchi, Hiroyuki Shirai, “Study of Micro Bubble Generation by a Swirl Jet (Measurement of Bubble Distribution by Light Transmission and Characteristics of Generation Bubbles),” Journal of Environment and Engineering, vol. 2, no. 1, pp. 172–182, 2007, doi: 10.1299/jee.2.172.
[3] M. Sadatomi, A. Kawahara, H. Matsuura, and S. Shikatani, “Micro-bubble generation rate and bubble dissolution rate into water by a simple multi-fluid mixer with orifice and porous tube,” Experimental Thermal and Fluid Science, vol. 41, pp. 23–30, 2012, doi: 10.1016/j.expthermflusci.2012.03.002.
[4] W. Liu and B. Bai, “Two-phase flow patterns and pressure drop inside a vertical pipe containing a short helical tape insert,” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, vol. 1D, pp. 1–9, 2014, doi: 10.1115/FEDSM2014-21144.
[5] T. Temesgen, T. T. Bui, M. Han, T. il Kim, and H. Park, “Micro and nanobubble technologies as a new horizon for water-treatment techniques: A review,” Advances in Colloid and Interface Science, vol. 246, pp. 40–51, 2017, doi: 10.1016/j.cis.2017.06.011.
[6] W. E. Juwana, A. Widyatama, O. Dinaryanto, W. Budhijanto, Indarto, and Deendarlianto, “Hydrodynamic characteristics of the microbubble dissolution in liquid using orifice type microbubble generator,” Chemical Engineering Research and Design, vol. 141, pp. 436–448, 2019, doi: 10.1016/j.cherd.2018.11.017.
[7] A. Agarwal, W. J. Ng, and Y. Liu, “Principle and applications of microbubble and nanobubble technology for water treatment,” Chemosphere, vol. 84, no. 9, pp. 1175–1180, 2011, doi: 10.1016/j.chemosphere.2011.05.054.
[8] W. Zhang, M. Rezaee, A. Bhagavatula, Y. Li, J. Groppo, and R. Honaker, “A review of the occurrence and promising recovery methods of rare earth elements from coal and coal by-products,” International Journal of Coal Preparation and Utilization, vol. 35, no. 6, pp. 295–330, 2015, doi: 10.1080/19392699.2015.1033097.
[9] J. Cheng et al., “Bioresource Technology A novel jet-aerated tangential swirling-flow plate photobioreactor generates microbubbles that enhance mass transfer and improve microalgal growth,” Bioresource Technology, vol. 288, no. May, p. 121531, 2019, doi: 10.1016/j.biortech.2019.121531.
[10] A. Yoshida, O. Takahashi, Y. Ishii, Y. Sekimoto, and Y. Kurata, “Water purification using the adsorption characteristics of microbubbles,” Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 47, no. 8 PART 1, pp. 6574–6577, 2008, doi: 10.1143/JJAP.47.6574.
[11] F. Rehman, G. J. D. Medley, H. Bandulasena, and W. B. J. Zimmerman, “Fluidic oscillator-mediated microbubble generation to provide cost effective mass transfer and mixing efficiency to the wastewater treatment plants,” Environmental Research, vol. 137, pp. 32–39, 2015, doi: 10.1016/j.envres.2014.11.017.
[12] L. Marbelia et al., “A Comparative Study of Conventional Aerator and Microbubble Generator in Aerobic Reactors for Wastewater Treatment,” IOP Conference Series: Materials Science and Engineering, vol. 778, no. 1, 2020, doi: 10.1088/1757-899X/778/1/012132.
[13] K. Terasaka, A. Hirabayashi, T. Nishino, S. Fujioka, and D. Kobayashi, “Development of microbubble aerator for waste water treatment using aerobic activated sludge,” Chemical Engineering Science, vol. 66, no. 14, pp. 3172–3179, 2011, doi: 10.1016/j.ces.2011.02.043.
[14] H. Zhou and D. W. Smith, “Ozone mass transfer in water and wastewater treatment: Experimental observations using a 2D laser particle dynamics analyzer,” Water Research, vol. 34, no. 3, pp. 909–921, 2000, doi: 10.1016/S0043-1354(99)00196-7.
[15] J. Zhu et al., “Cleaning with Bulk Nanobubbles,” Langmuir, vol. 32, no. 43, pp. 11203–11211, 2016, doi: 10.1021/acs.langmuir.6b01004.
[16] S. Liu, Q. Wang, H. Ma, P. Huang, J. Li, and T. Kikuchi, “Effect of micro-bubbles on coagulation flotation process of dyeing wastewater,” Separation and Purification Technology, vol. 71, no. 3, pp. 337–346, 2010, doi: 10.1016/j.seppur.2009.12.021.
[17] P. E. Poh, W. Y. J. Ong, E. V. Lau, and M. N. Chong, “Investigation on micro-bubble flotation and coagulation for the treatment of anaerobically treated palm oil mill effluent (POME),” Journal of Environmental Chemical Engineering, vol. 2, no. 2, pp. 1174–1181, 2014, doi: 10.1016/j.jece.2014.04.018.
[18] M. Ishikawa, K. Irabu, I. Teruya, and M. Nitta, “PIV measurement of a contraction flow using micro-bubble tracer,” Journal of Physics: Conference Series, vol. 147, pp. 0–5, 2009, doi: 10.1088/1742-6596/147/1/012010.
[19] M. Kogawa, H., Naoe, T., Kyotoh, H., Haga, K., Kinoshita, H., Futakawa., “Development of Microbubble Generator for Suppression of Pressure Wave in Mercury Target of Spallation Source,” Journal of Nuclear Science and Technology, vol. 52, no. 12, 2015.
[20] C. Barbier, E. Dominguez-Ontiveros, and R. Sangrey, “Small bubbles generation with swirl bubblers for SNS target,” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, vol. 3, 2018, doi: 10.1115/FEDSM2018-83077.
[21] I Ketut Daging, Pungkas Prayitno, Iwan G. Wardana, Akhmad Syarifudin, Hendro Sukismo, and Sugianto, “Rancang Bangun Alat Aerasi Mikro Bubblepada Budidaya Air Tawar,” Journal of Innovation Research and Knowledge, vol. 2, no. 1, pp. 239–244, 2022.
[22] S. Fujikawa, R. Zhang, S. Hayama, and G. Peng, “The control of micro-air-bubble generation by a rotational porous plate,” International Journal of Multiphase Flow, vol. 29, no. 8, pp. 1221–1236, 2003, doi: 10.1016/S0301-9322(03)00106-X.
[23] A. Gordiychuk, M. Svanera, S. Benini, and P. Poesio, “Size distribution and Sauter mean diameter of micro bubbles for a Venturi type bubble generator,” Experimental Thermal and Fluid Science, vol. 70, pp. 51–60, 2016, doi: 10.1016/j.expthermflusci.2015.08.014.
[24] D. I. Mawarni, W. E. Juwana, K. A. Yuana, W. Budhijanto, Deendarlianto, and Indarto, “Hydrodynamic characteristics of the microbubble dissolution in liquid using the swirl flow type of microbubble generator,” Journal of Water Process Engineering, vol. 48, no. 2, p. 102846, 2022, doi: 10.1016/j.jwpe.2022.102846.
[25] X. Wang et al., “Bubble breakup in a swirl-venturi microbubble generator,” Chemical Engineering Journal, vol. 401, no. January, 2021, doi: 10.1016/j.cej.2020.126397.
[26] H. S. Alam, Bahrudin, A. T. Sugiarto, and G. G. Redhyka, “Unsteady numerical simulation of gas-liquid flow in dual chamber microbubble generator,” in Proceedings of the 2nd International Conference on Automation, Cognitive Science, Optics, Micro Electro-Mechanical System, and Information Technology, ICACOMIT 2017, 2017, vol. 2018-Janua, no. 1, pp. 133–137, doi: 10.1109/ICACOMIT.2017.8253401.
[27] M. L. Jackson, “Aeration in Bernoulli types of devices,” AIChE Journal, vol. 10, no. 6, pp. 836–842, 1964, doi: 10.1002/aic.690100612.
[28] H. Ohnari, “Swirling Fine-Bubble Generator,” US638260B1, 2002.
[29] X. Xu, X. Ge, Y. Qian, B. Zhang, H. Wang, and Q. Yang, “Effect of nozzle diameter on bubble generation with gas self-suction through swirling flow,” Chemical Engineering Research and Design, vol. 138, pp. 13–20, 2018, doi: 10.1016/j.cherd.2018.04.027.
[30] I. Levitsky, V. Gitis, and D. Tavor, “Generation of Coarse Bubbles and Flow Instability Control by Means of a Bubble Generator,” Chemical Engineering and Technology, vol. 42, no. 5, pp. 1127–1134, 2019, doi: 10.1002/ceat.201800158.
[31] G. Amini, “Liquid flow in a simplex swirl nozzle,” International Journal of Multiphase Flow, vol. 79, pp. 225–235, 2016, doi: 10.1016/j.ijmultiphaseflow.2015.09.004.
[32] H. I. M. K. Dhiputra and S. Wijayanta, “Discharge coefficient of swirling nozzle with swirling chamber volume variation for liquefied petroleum gas,” World Applied Sciences Journal, vol. 25, no. 3, pp. 369–376, 2013, doi: 10.5829/idosi.wasj.2013.25.03.2691.
[33] H. J. Sheen, W. J. Chen, S. Y. Jeng, and T. L. Huang, “Correlation of Swirl Number for a Radial-Type Swirl Generator,” Experimental Thermal and Fluid Science, vol. 12, no. 4, pp. 444–451, 1996, doi: 10.1016/0894-1777(95)00135-2.
[34] A. J. Fitzgerald, K. Hourigan, and M. C. Thompson, “Vortex breakdown state selection as a meta-stable process,” ANZIAM Journal, vol. 46, p. 351, 2005, doi: 10.21914/anziamj.v46i0.964.
[35] G. F. Carnevale, R. C. Kloosterziel, P. Orlandi, and D. D. J. A. Van Sommeren, “Predicting the aftermath of vortex breakup in rotating flow,” Journal of Fluid Mechanics, vol. 669, no. May 2014, pp. 90–119, 2011, doi: 10.1017/S0022112010004945.
[36] R. Parmar and S. K. Majumder, “Microbubble generation and microbubble-aided transport process intensification-A state-of-the-art report,” Chemical Engineering and Processing: Process Intensification, vol. 64, pp. 79–97, 2013, doi: 10.1016/j.cep.2012.12.002.
[37] Y. Liao and D. Lucas, “A literature review of theoretical models for drop and bubble breakup in turbulent dispersions,” Chemical Engineering Science, vol. 64, no. 15, pp. 3389–3406, 2009, doi: 10.1016/j.ces.2009.04.026.
[38] A. Sadatomi, M., Kawahara, A., Kano, K., and Ohtomo, “Performance of New Micro-Bubble Generator With A Sperical Body in Flowing Water Tube,” Experimental Thermal and Fluid Science, vol. 29, pp. 615–623, 2005.
[39] M. Kukizaki and M. Goto, “Size control of nanobubbles generated from Shirasu-porous-glass (SPG) membranes,” Journal of Membrane Science, vol. 281, no. 1–2, pp. 386–396, 2006, doi: 10.1016/j.memsci.2006.04.007.
[40] M. Kukizaki and M. Goto, “Spontaneous formation behavior of uniform-sized microbubbles from Shirasu porous glass (SPG) membranes in the absence of water-phase flow,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 296, no. 1–3, pp. 174–181, 2007, doi: 10.1016/j.colsurfa.2006.09.042.
[41] X. Luo, L. Yang, H. Yin, L. He, and Y. Lü, “A review of vortex tools toward liquid unloading for the oil and gas industry,” Chemical Engineering and Processing - Process Intensification, vol. 145, no. October, p. 107679, 2019, doi: 10.1016/j.cep.2019.107679.
[42] A. Islek, “The Impact of Swirl in Turbulent Pipe Flow,” Georgia Institute of Technology, 2004.
[43] N. Sinaga, “Kaji Numerik Aliran Jet-Swirling Pada Saluran Annulus Menggunakan Metode Volume Hingga,” Rotasi, vol. 19, no. 2, p. 52, 2017, doi: 10.14710/rotasi.19.2.52-60.
[44] C. H. Lee, H. Choi, D. W. Jerng, D. E. Kim, S. Wongwises, and H. S. Ahn, “Experimental investigation of microbubble generation in the venturi nozzle,” International Journal of Heat and Mass Transfer, vol. 136, pp. 1127–1138, 2019, doi: 10.1016/j.ijheatmasstransfer.2019.03.040.
[45] F. T. Kanizawa and G. Ribatski, “Two-phase flow patterns and pressure drop inside horizontal tubes containing twisted-tape inserts,” International Journal of Multiphase Flow, vol. 47, pp. 50–65, 2012, doi: 10.1016/j.ijmultiphaseflow.2012.07.003.
[46] Z. Qiao, Z. Wang, C. Zhang, S. Yuan, Y. Zhu, and J. Wang, “PVAm–PIP/PS composite membrane with high performance for CO2/N2 separation,” AIChE Journal, vol. 59, no. 4, pp. 215–228, 2012, doi: 10.1002/aic.13781.
[47] H. Funahashi, K. Hayashi, S. Hosokawa, and A. Tomiyama, “Two-phase swirling flow in a gas-liquid separator,” Transactions of the American Nuclear Society, vol. 113, no. 4, pp. 1454–1455, 2015, doi: 10.1299/jpes.2.1120.
[48] F. Liang, J. Chen, J. Wang, H. Yu, and X. Cao, “Gas-liquid two-phase flow equal division using a swirling flow distributor,” Experimental Thermal and Fluid Science, vol. 59, pp. 43–50, 2014, doi: 10.1016/j.expthermflusci.2014.07.013.
[49] L. Liu and B. Bai, “Flow regime identification of swirling gas-liquid flow with image processing technique and neural networks,” Chemical Engineering Science, vol. 199, pp. 588–601, 2019, doi: 10.1016/j.ces.2019.01.037.
[50] Y. Yang, D. Wang, P. Niu, M. Liu, and S. Wang, “Gas-liquid two-phase flow measurements by the electromagnetic flowmeter combined with a phase-isolation method,” Flow Measurement and Instrumentation, vol. 60, pp. 78–87, 2018, doi: 10.1016/j.flowmeasinst.2018.02.002.
[51] S. Imao, M. Itoh, and T. Harada, “Turbulent characteristics of the flow in an axially rotating pipe,” International Journal of Heat and Fluid Flow, vol. 17, no. 5, pp. 444–451, 1996, doi: 10.1016/0142-727X(96)00057-4.
[52] H. Yamaguchi, D. Matsubara, and S. Shuchi, “Flow characteristics and micro-bubble behaviour in a rotating pipe section with an abrupt enlargement,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 215, no. 12, pp. 1447–1457, 2001, doi: 10.1243/0954406011524801.
[53] P. Srinoi and K. Sato, “Controllable Air-bubbles Size Generator Performance with Swirl Flow,” KMUTNB International Journal of Applied Science and Technology, vol. 8, no. 4, pp. 1–5, 2015, doi: 10.14416/j.ijast.2015.08.002.
[54] L. Gomez, R. Mohan, and O. Shoham, “Swirling gas-liquid two-phase flow - Experiment and modeling part II: Turbulent quantities and core stability,” Journal of Fluids Engineering, Transactions of the ASME, vol. 126, no. 6, pp. 943–959, 2004, doi: 10.1115/1.1849254.
[55] R. Hreiz, R. Lainé, J. Wu, C. Lemaitre, C. Gentric, and D. Fünfschilling, “On the effect of the nozzle design on the performances of gas-liquid cylindrical cyclone separators,” International Journal of Multiphase Flow, vol. 58, pp. 15–26, 2014, doi: 10.1016/j.ijmultiphaseflow.2013.08.006.
[56] Y. Hato, “Micro-bubble generator and micro-bubble generation device,” US008991796B2, 2015.
[57] J. Huang et al., “A review on bubble generation and transportation in Venturi-type bubble generators,” Experimental and Computational Multiphase Flow, vol. 2, no. 3, pp. 123–134, 2020, doi: 10.1007/s42757-019-0049-3.
[58] L. Zhao et al., “Effects of the divergent angle on bubble transportation in a rectangular Venturi channel and its performance in producing fine bubbles,” International Journal of Multiphase Flow, vol. 114, pp. 192–206, 2019, doi: 10.1016/j.ijmultiphaseflow.2019.02.003.
[59] S. I. Uesawa, A. Kaneko, Y. Nomura, and Y. Abe, “Fluctuation of void fraction in the microbubble generator with a venturi tube,” ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011, vol. 1, no. PARTS A, B, C, D, pp. 2483–2492, 2011, doi: 10.1115/AJK2011-10014.
[60] R. Etchepare, H. Oliveira, M. Nicknig, A. Azevedo, and J. Rubio, “Nanobubbles: Generation using a multiphase pump, properties and features in flotation,” Minerals Engineering, vol. 112, no. March, pp. 19–26, 2017, doi: 10.1016/j.mineng.2017.06.020.
[61] D. Sharma, A. Patwardhan, and V. Ranade, “Effect of turbulent dispersion on hydrodynamic characteristics in a liquid jet ejector,” Energy, vol. 164, pp. 10–20, 2018, doi: 10.1016/j.energy.2018.08.171.
[62] J. Zahradník, M. Fialová, V. Linek, J. Sinkule, J. Řezníčková, and F. Kaštánek, “Dispersion efficiency of ejector-type gas distributors in different operating modes,” Chemical Engineering Science, vol. 52, no. 24, pp. 4499–4510, 1997, doi: 10.1016/S0009-2509(97)00294-7.
[63] Y. Shuai et al., “Bubble Size Distribution and Rise Velocity in a Jet Bubbling Reactor,” Industrial and Engineering Chemistry Research, vol. 58, no. 41, pp. 19271–19279, 2019, doi: 10.1021/acs.iecr.9b03880.
[64] S. K. Pallapothu and A. M. Al Taweel, “Effect of contaminants on the gas holdup and mixing in internal airlift reactors equipped with microbubble generator,” International Journal of Chemical Engineering, vol. 2012, 2012, doi: 10.1155/2012/569463.
[65] X. Tao, Y. Liu, H. Jiang, and R. Chen, “Microbubble generation with shear flow on large-area membrane for fine particle flotation,” Chemical Engineering and Processing - Process Intensification, vol. 145, no. June, p. 107671, 2019, doi: 10.1016/j.cep.2019.107671.
[66] Q. Xu, M. Nakajima, S. Ichikawa, N. Nakamura, and T. Shiina, “A comparative study of microbubble generation by mechanical agitation and sonication,” Innovative Food Science and Emerging Technologies, vol. 9, no. 4, pp. 489–494, 2008, doi: 10.1016/j.ifset.2008.03.003.
[67] Y. Lecoffre and J. Marcoz, “Micro-bubble Injector,” US4556523, 1985.
[68] R.-H. Yoon, G. T. Adel, and G. H. Luttrell, “Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles,” US4981582A, 1991.
[69] P. Gordiychuk, A., Svanera, M., Benini, S., Poesio, “Size Distribution and Sauter Mean Diameter of Microbubble for a Venturi Type Bubble Generator,” Experimental Thermal and Fluid Science, vol. 70, no. January, pp. 51–60, 2016, doi: 10.1016/j.expthermflusci.2015.08.014.
[70] G. Khirani, S., Kunwapanitchakul, P., Augir, F., Guigui, C., Guiraud, P., Hebrard, “Microbubble generation Through Porous membrane Under Aqueous or Organic Liquid Shear Flow,” Industrial & Engneering Chemistry Research, vol. 51, no. 4, pp. 1997–2009, 2012, doi: 10.1021/ie200604g.
[71] N. Suwartha, D. Syamzida, C. R. Priadi, S. S. Moersidik, and F. Ali, “Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes,” Heliyon, vol. 6, no. 4, p. e03748, 2020, doi: 10.1016/j.heliyon.2020.e03748.
[72] B. Swart et al., “In situ characterisation of size distribution and rise velocity of microbubbles by high-speed photography,” Chemical Engineering Science, vol. 225, p. 115836, 2020, doi: 10.1016/j.ces.2020.115836.
[73] Y. Bao, S. Tong, J. Zhang, Z. Cai, and Z. Gao, “Reactive mass transfer of single bubbles in a turbulent flow chamber: Discussion on the effects of slippage a
[2] F. T. Katsuine Tabei, Shuka Haruyama, Shuichi Yamaguchi, Hiroyuki Shirai, “Study of Micro Bubble Generation by a Swirl Jet (Measurement of Bubble Distribution by Light Transmission and Characteristics of Generation Bubbles),” Journal of Environment and Engineering, vol. 2, no. 1, pp. 172–182, 2007, doi: 10.1299/jee.2.172.
[3] M. Sadatomi, A. Kawahara, H. Matsuura, and S. Shikatani, “Micro-bubble generation rate and bubble dissolution rate into water by a simple multi-fluid mixer with orifice and porous tube,” Experimental Thermal and Fluid Science, vol. 41, pp. 23–30, 2012, doi: 10.1016/j.expthermflusci.2012.03.002.
[4] W. Liu and B. Bai, “Two-phase flow patterns and pressure drop inside a vertical pipe containing a short helical tape insert,” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, vol. 1D, pp. 1–9, 2014, doi: 10.1115/FEDSM2014-21144.
[5] T. Temesgen, T. T. Bui, M. Han, T. il Kim, and H. Park, “Micro and nanobubble technologies as a new horizon for water-treatment techniques: A review,” Advances in Colloid and Interface Science, vol. 246, pp. 40–51, 2017, doi: 10.1016/j.cis.2017.06.011.
[6] W. E. Juwana, A. Widyatama, O. Dinaryanto, W. Budhijanto, Indarto, and Deendarlianto, “Hydrodynamic characteristics of the microbubble dissolution in liquid using orifice type microbubble generator,” Chemical Engineering Research and Design, vol. 141, pp. 436–448, 2019, doi: 10.1016/j.cherd.2018.11.017.
[7] A. Agarwal, W. J. Ng, and Y. Liu, “Principle and applications of microbubble and nanobubble technology for water treatment,” Chemosphere, vol. 84, no. 9, pp. 1175–1180, 2011, doi: 10.1016/j.chemosphere.2011.05.054.
[8] W. Zhang, M. Rezaee, A. Bhagavatula, Y. Li, J. Groppo, and R. Honaker, “A review of the occurrence and promising recovery methods of rare earth elements from coal and coal by-products,” International Journal of Coal Preparation and Utilization, vol. 35, no. 6, pp. 295–330, 2015, doi: 10.1080/19392699.2015.1033097.
[9] J. Cheng et al., “Bioresource Technology A novel jet-aerated tangential swirling-flow plate photobioreactor generates microbubbles that enhance mass transfer and improve microalgal growth,” Bioresource Technology, vol. 288, no. May, p. 121531, 2019, doi: 10.1016/j.biortech.2019.121531.
[10] A. Yoshida, O. Takahashi, Y. Ishii, Y. Sekimoto, and Y. Kurata, “Water purification using the adsorption characteristics of microbubbles,” Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 47, no. 8 PART 1, pp. 6574–6577, 2008, doi: 10.1143/JJAP.47.6574.
[11] F. Rehman, G. J. D. Medley, H. Bandulasena, and W. B. J. Zimmerman, “Fluidic oscillator-mediated microbubble generation to provide cost effective mass transfer and mixing efficiency to the wastewater treatment plants,” Environmental Research, vol. 137, pp. 32–39, 2015, doi: 10.1016/j.envres.2014.11.017.
[12] L. Marbelia et al., “A Comparative Study of Conventional Aerator and Microbubble Generator in Aerobic Reactors for Wastewater Treatment,” IOP Conference Series: Materials Science and Engineering, vol. 778, no. 1, 2020, doi: 10.1088/1757-899X/778/1/012132.
[13] K. Terasaka, A. Hirabayashi, T. Nishino, S. Fujioka, and D. Kobayashi, “Development of microbubble aerator for waste water treatment using aerobic activated sludge,” Chemical Engineering Science, vol. 66, no. 14, pp. 3172–3179, 2011, doi: 10.1016/j.ces.2011.02.043.
[14] H. Zhou and D. W. Smith, “Ozone mass transfer in water and wastewater treatment: Experimental observations using a 2D laser particle dynamics analyzer,” Water Research, vol. 34, no. 3, pp. 909–921, 2000, doi: 10.1016/S0043-1354(99)00196-7.
[15] J. Zhu et al., “Cleaning with Bulk Nanobubbles,” Langmuir, vol. 32, no. 43, pp. 11203–11211, 2016, doi: 10.1021/acs.langmuir.6b01004.
[16] S. Liu, Q. Wang, H. Ma, P. Huang, J. Li, and T. Kikuchi, “Effect of micro-bubbles on coagulation flotation process of dyeing wastewater,” Separation and Purification Technology, vol. 71, no. 3, pp. 337–346, 2010, doi: 10.1016/j.seppur.2009.12.021.
[17] P. E. Poh, W. Y. J. Ong, E. V. Lau, and M. N. Chong, “Investigation on micro-bubble flotation and coagulation for the treatment of anaerobically treated palm oil mill effluent (POME),” Journal of Environmental Chemical Engineering, vol. 2, no. 2, pp. 1174–1181, 2014, doi: 10.1016/j.jece.2014.04.018.
[18] M. Ishikawa, K. Irabu, I. Teruya, and M. Nitta, “PIV measurement of a contraction flow using micro-bubble tracer,” Journal of Physics: Conference Series, vol. 147, pp. 0–5, 2009, doi: 10.1088/1742-6596/147/1/012010.
[19] M. Kogawa, H., Naoe, T., Kyotoh, H., Haga, K., Kinoshita, H., Futakawa., “Development of Microbubble Generator for Suppression of Pressure Wave in Mercury Target of Spallation Source,” Journal of Nuclear Science and Technology, vol. 52, no. 12, 2015.
[20] C. Barbier, E. Dominguez-Ontiveros, and R. Sangrey, “Small bubbles generation with swirl bubblers for SNS target,” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, vol. 3, 2018, doi: 10.1115/FEDSM2018-83077.
[21] I Ketut Daging, Pungkas Prayitno, Iwan G. Wardana, Akhmad Syarifudin, Hendro Sukismo, and Sugianto, “Rancang Bangun Alat Aerasi Mikro Bubblepada Budidaya Air Tawar,” Journal of Innovation Research and Knowledge, vol. 2, no. 1, pp. 239–244, 2022.
[22] S. Fujikawa, R. Zhang, S. Hayama, and G. Peng, “The control of micro-air-bubble generation by a rotational porous plate,” International Journal of Multiphase Flow, vol. 29, no. 8, pp. 1221–1236, 2003, doi: 10.1016/S0301-9322(03)00106-X.
[23] A. Gordiychuk, M. Svanera, S. Benini, and P. Poesio, “Size distribution and Sauter mean diameter of micro bubbles for a Venturi type bubble generator,” Experimental Thermal and Fluid Science, vol. 70, pp. 51–60, 2016, doi: 10.1016/j.expthermflusci.2015.08.014.
[24] D. I. Mawarni, W. E. Juwana, K. A. Yuana, W. Budhijanto, Deendarlianto, and Indarto, “Hydrodynamic characteristics of the microbubble dissolution in liquid using the swirl flow type of microbubble generator,” Journal of Water Process Engineering, vol. 48, no. 2, p. 102846, 2022, doi: 10.1016/j.jwpe.2022.102846.
[25] X. Wang et al., “Bubble breakup in a swirl-venturi microbubble generator,” Chemical Engineering Journal, vol. 401, no. January, 2021, doi: 10.1016/j.cej.2020.126397.
[26] H. S. Alam, Bahrudin, A. T. Sugiarto, and G. G. Redhyka, “Unsteady numerical simulation of gas-liquid flow in dual chamber microbubble generator,” in Proceedings of the 2nd International Conference on Automation, Cognitive Science, Optics, Micro Electro-Mechanical System, and Information Technology, ICACOMIT 2017, 2017, vol. 2018-Janua, no. 1, pp. 133–137, doi: 10.1109/ICACOMIT.2017.8253401.
[27] M. L. Jackson, “Aeration in Bernoulli types of devices,” AIChE Journal, vol. 10, no. 6, pp. 836–842, 1964, doi: 10.1002/aic.690100612.
[28] H. Ohnari, “Swirling Fine-Bubble Generator,” US638260B1, 2002.
[29] X. Xu, X. Ge, Y. Qian, B. Zhang, H. Wang, and Q. Yang, “Effect of nozzle diameter on bubble generation with gas self-suction through swirling flow,” Chemical Engineering Research and Design, vol. 138, pp. 13–20, 2018, doi: 10.1016/j.cherd.2018.04.027.
[30] I. Levitsky, V. Gitis, and D. Tavor, “Generation of Coarse Bubbles and Flow Instability Control by Means of a Bubble Generator,” Chemical Engineering and Technology, vol. 42, no. 5, pp. 1127–1134, 2019, doi: 10.1002/ceat.201800158.
[31] G. Amini, “Liquid flow in a simplex swirl nozzle,” International Journal of Multiphase Flow, vol. 79, pp. 225–235, 2016, doi: 10.1016/j.ijmultiphaseflow.2015.09.004.
[32] H. I. M. K. Dhiputra and S. Wijayanta, “Discharge coefficient of swirling nozzle with swirling chamber volume variation for liquefied petroleum gas,” World Applied Sciences Journal, vol. 25, no. 3, pp. 369–376, 2013, doi: 10.5829/idosi.wasj.2013.25.03.2691.
[33] H. J. Sheen, W. J. Chen, S. Y. Jeng, and T. L. Huang, “Correlation of Swirl Number for a Radial-Type Swirl Generator,” Experimental Thermal and Fluid Science, vol. 12, no. 4, pp. 444–451, 1996, doi: 10.1016/0894-1777(95)00135-2.
[34] A. J. Fitzgerald, K. Hourigan, and M. C. Thompson, “Vortex breakdown state selection as a meta-stable process,” ANZIAM Journal, vol. 46, p. 351, 2005, doi: 10.21914/anziamj.v46i0.964.
[35] G. F. Carnevale, R. C. Kloosterziel, P. Orlandi, and D. D. J. A. Van Sommeren, “Predicting the aftermath of vortex breakup in rotating flow,” Journal of Fluid Mechanics, vol. 669, no. May 2014, pp. 90–119, 2011, doi: 10.1017/S0022112010004945.
[36] R. Parmar and S. K. Majumder, “Microbubble generation and microbubble-aided transport process intensification-A state-of-the-art report,” Chemical Engineering and Processing: Process Intensification, vol. 64, pp. 79–97, 2013, doi: 10.1016/j.cep.2012.12.002.
[37] Y. Liao and D. Lucas, “A literature review of theoretical models for drop and bubble breakup in turbulent dispersions,” Chemical Engineering Science, vol. 64, no. 15, pp. 3389–3406, 2009, doi: 10.1016/j.ces.2009.04.026.
[38] A. Sadatomi, M., Kawahara, A., Kano, K., and Ohtomo, “Performance of New Micro-Bubble Generator With A Sperical Body in Flowing Water Tube,” Experimental Thermal and Fluid Science, vol. 29, pp. 615–623, 2005.
[39] M. Kukizaki and M. Goto, “Size control of nanobubbles generated from Shirasu-porous-glass (SPG) membranes,” Journal of Membrane Science, vol. 281, no. 1–2, pp. 386–396, 2006, doi: 10.1016/j.memsci.2006.04.007.
[40] M. Kukizaki and M. Goto, “Spontaneous formation behavior of uniform-sized microbubbles from Shirasu porous glass (SPG) membranes in the absence of water-phase flow,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 296, no. 1–3, pp. 174–181, 2007, doi: 10.1016/j.colsurfa.2006.09.042.
[41] X. Luo, L. Yang, H. Yin, L. He, and Y. Lü, “A review of vortex tools toward liquid unloading for the oil and gas industry,” Chemical Engineering and Processing - Process Intensification, vol. 145, no. October, p. 107679, 2019, doi: 10.1016/j.cep.2019.107679.
[42] A. Islek, “The Impact of Swirl in Turbulent Pipe Flow,” Georgia Institute of Technology, 2004.
[43] N. Sinaga, “Kaji Numerik Aliran Jet-Swirling Pada Saluran Annulus Menggunakan Metode Volume Hingga,” Rotasi, vol. 19, no. 2, p. 52, 2017, doi: 10.14710/rotasi.19.2.52-60.
[44] C. H. Lee, H. Choi, D. W. Jerng, D. E. Kim, S. Wongwises, and H. S. Ahn, “Experimental investigation of microbubble generation in the venturi nozzle,” International Journal of Heat and Mass Transfer, vol. 136, pp. 1127–1138, 2019, doi: 10.1016/j.ijheatmasstransfer.2019.03.040.
[45] F. T. Kanizawa and G. Ribatski, “Two-phase flow patterns and pressure drop inside horizontal tubes containing twisted-tape inserts,” International Journal of Multiphase Flow, vol. 47, pp. 50–65, 2012, doi: 10.1016/j.ijmultiphaseflow.2012.07.003.
[46] Z. Qiao, Z. Wang, C. Zhang, S. Yuan, Y. Zhu, and J. Wang, “PVAm–PIP/PS composite membrane with high performance for CO2/N2 separation,” AIChE Journal, vol. 59, no. 4, pp. 215–228, 2012, doi: 10.1002/aic.13781.
[47] H. Funahashi, K. Hayashi, S. Hosokawa, and A. Tomiyama, “Two-phase swirling flow in a gas-liquid separator,” Transactions of the American Nuclear Society, vol. 113, no. 4, pp. 1454–1455, 2015, doi: 10.1299/jpes.2.1120.
[48] F. Liang, J. Chen, J. Wang, H. Yu, and X. Cao, “Gas-liquid two-phase flow equal division using a swirling flow distributor,” Experimental Thermal and Fluid Science, vol. 59, pp. 43–50, 2014, doi: 10.1016/j.expthermflusci.2014.07.013.
[49] L. Liu and B. Bai, “Flow regime identification of swirling gas-liquid flow with image processing technique and neural networks,” Chemical Engineering Science, vol. 199, pp. 588–601, 2019, doi: 10.1016/j.ces.2019.01.037.
[50] Y. Yang, D. Wang, P. Niu, M. Liu, and S. Wang, “Gas-liquid two-phase flow measurements by the electromagnetic flowmeter combined with a phase-isolation method,” Flow Measurement and Instrumentation, vol. 60, pp. 78–87, 2018, doi: 10.1016/j.flowmeasinst.2018.02.002.
[51] S. Imao, M. Itoh, and T. Harada, “Turbulent characteristics of the flow in an axially rotating pipe,” International Journal of Heat and Fluid Flow, vol. 17, no. 5, pp. 444–451, 1996, doi: 10.1016/0142-727X(96)00057-4.
[52] H. Yamaguchi, D. Matsubara, and S. Shuchi, “Flow characteristics and micro-bubble behaviour in a rotating pipe section with an abrupt enlargement,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 215, no. 12, pp. 1447–1457, 2001, doi: 10.1243/0954406011524801.
[53] P. Srinoi and K. Sato, “Controllable Air-bubbles Size Generator Performance with Swirl Flow,” KMUTNB International Journal of Applied Science and Technology, vol. 8, no. 4, pp. 1–5, 2015, doi: 10.14416/j.ijast.2015.08.002.
[54] L. Gomez, R. Mohan, and O. Shoham, “Swirling gas-liquid two-phase flow - Experiment and modeling part II: Turbulent quantities and core stability,” Journal of Fluids Engineering, Transactions of the ASME, vol. 126, no. 6, pp. 943–959, 2004, doi: 10.1115/1.1849254.
[55] R. Hreiz, R. Lainé, J. Wu, C. Lemaitre, C. Gentric, and D. Fünfschilling, “On the effect of the nozzle design on the performances of gas-liquid cylindrical cyclone separators,” International Journal of Multiphase Flow, vol. 58, pp. 15–26, 2014, doi: 10.1016/j.ijmultiphaseflow.2013.08.006.
[56] Y. Hato, “Micro-bubble generator and micro-bubble generation device,” US008991796B2, 2015.
[57] J. Huang et al., “A review on bubble generation and transportation in Venturi-type bubble generators,” Experimental and Computational Multiphase Flow, vol. 2, no. 3, pp. 123–134, 2020, doi: 10.1007/s42757-019-0049-3.
[58] L. Zhao et al., “Effects of the divergent angle on bubble transportation in a rectangular Venturi channel and its performance in producing fine bubbles,” International Journal of Multiphase Flow, vol. 114, pp. 192–206, 2019, doi: 10.1016/j.ijmultiphaseflow.2019.02.003.
[59] S. I. Uesawa, A. Kaneko, Y. Nomura, and Y. Abe, “Fluctuation of void fraction in the microbubble generator with a venturi tube,” ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011, vol. 1, no. PARTS A, B, C, D, pp. 2483–2492, 2011, doi: 10.1115/AJK2011-10014.
[60] R. Etchepare, H. Oliveira, M. Nicknig, A. Azevedo, and J. Rubio, “Nanobubbles: Generation using a multiphase pump, properties and features in flotation,” Minerals Engineering, vol. 112, no. March, pp. 19–26, 2017, doi: 10.1016/j.mineng.2017.06.020.
[61] D. Sharma, A. Patwardhan, and V. Ranade, “Effect of turbulent dispersion on hydrodynamic characteristics in a liquid jet ejector,” Energy, vol. 164, pp. 10–20, 2018, doi: 10.1016/j.energy.2018.08.171.
[62] J. Zahradník, M. Fialová, V. Linek, J. Sinkule, J. Řezníčková, and F. Kaštánek, “Dispersion efficiency of ejector-type gas distributors in different operating modes,” Chemical Engineering Science, vol. 52, no. 24, pp. 4499–4510, 1997, doi: 10.1016/S0009-2509(97)00294-7.
[63] Y. Shuai et al., “Bubble Size Distribution and Rise Velocity in a Jet Bubbling Reactor,” Industrial and Engineering Chemistry Research, vol. 58, no. 41, pp. 19271–19279, 2019, doi: 10.1021/acs.iecr.9b03880.
[64] S. K. Pallapothu and A. M. Al Taweel, “Effect of contaminants on the gas holdup and mixing in internal airlift reactors equipped with microbubble generator,” International Journal of Chemical Engineering, vol. 2012, 2012, doi: 10.1155/2012/569463.
[65] X. Tao, Y. Liu, H. Jiang, and R. Chen, “Microbubble generation with shear flow on large-area membrane for fine particle flotation,” Chemical Engineering and Processing - Process Intensification, vol. 145, no. June, p. 107671, 2019, doi: 10.1016/j.cep.2019.107671.
[66] Q. Xu, M. Nakajima, S. Ichikawa, N. Nakamura, and T. Shiina, “A comparative study of microbubble generation by mechanical agitation and sonication,” Innovative Food Science and Emerging Technologies, vol. 9, no. 4, pp. 489–494, 2008, doi: 10.1016/j.ifset.2008.03.003.
[67] Y. Lecoffre and J. Marcoz, “Micro-bubble Injector,” US4556523, 1985.
[68] R.-H. Yoon, G. T. Adel, and G. H. Luttrell, “Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles,” US4981582A, 1991.
[69] P. Gordiychuk, A., Svanera, M., Benini, S., Poesio, “Size Distribution and Sauter Mean Diameter of Microbubble for a Venturi Type Bubble Generator,” Experimental Thermal and Fluid Science, vol. 70, no. January, pp. 51–60, 2016, doi: 10.1016/j.expthermflusci.2015.08.014.
[70] G. Khirani, S., Kunwapanitchakul, P., Augir, F., Guigui, C., Guiraud, P., Hebrard, “Microbubble generation Through Porous membrane Under Aqueous or Organic Liquid Shear Flow,” Industrial & Engneering Chemistry Research, vol. 51, no. 4, pp. 1997–2009, 2012, doi: 10.1021/ie200604g.
[71] N. Suwartha, D. Syamzida, C. R. Priadi, S. S. Moersidik, and F. Ali, “Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes,” Heliyon, vol. 6, no. 4, p. e03748, 2020, doi: 10.1016/j.heliyon.2020.e03748.
[72] B. Swart et al., “In situ characterisation of size distribution and rise velocity of microbubbles by high-speed photography,” Chemical Engineering Science, vol. 225, p. 115836, 2020, doi: 10.1016/j.ces.2020.115836.
[73] Y. Bao, S. Tong, J. Zhang, Z. Cai, and Z. Gao, “Reactive mass transfer of single bubbles in a turbulent flow chamber: Discussion on the effects of slippage a