• Drajat Indah Mawarni Sekolah Tinggi Teknologi Ronggolawe Cepu
  • Indarto Indarto Universitas Gadjah Mada
  • Deendarlianto Deendarlianto Universitas Gadjah Mada
  • Wiratni Budhijanto Universitas Gadjah Mada



MBG, Bubble, Swirl, Hydraulic Power, Pressure Drop


This research uses a swirl type MBG (MBG) with the gap variation between the air nozzle and the outlet of 1, 5 and10 mm. In this experiment, we used a tangential inlet of 25 mm and an outlet of 20 mm with a water flow rate of 20 – 70 l/min and an air flow rate range of 0.1 – 0.8 l/min, to determine the characteristics of MBG which include bubble distribution, pressure drop, hydraulic power, and efficiency. The probability of the diameter of the microbubble formed was in the range of 90 – 150 µm for all variations of the air nozzle gap. The larger the incoming water flow rate, the smaller the diameter of the bubbles formed, whereas if the water flow rate decreases, the diameter of the bubbles formed will increase. In contrast to the water flow rate, if the air flow rate increases, the diameter of the bubbles formed will increase, whereas if it decreases, the diameter of the bubbles will decrease. From the signal processing data, information was obtained about the comparison of the pressure drop of the three variations of the air nozzle gap, as follows: The higher the water flow rate, the pressure drop and hydraulic values increase significantly, while for air flow rate, the higher the air flow rate, the pressure drop and hydraulic power values will increase albeit not significantly. As for MBG efficiency, it will decrease significantly with increasing water flow rate and will increase insignificantly with decreasing water flow rate.


ASTYANTO, A.H, MEDA, A.Y.M, DEENDARLIANTO, INDARTO., “Pengaruh Rasio I/D terhadap Permulaan Flooding dan Fluktuasi Voltase Sinyal Tekanan Rezim Flooding pada Geometri Kom-pleks”, Rekayasa Mesin, v. 12, n. 2, pp. 447 – 457, Agustus. 2021.

AKHTAR, M. S., RAJESH, M., CIJI, A., SHARMA, P., KAMALAM, B. S., PATIYAL, R. S., SINGH, A. K., SARMA, D., “Photo-thermal manipulations induce captive maturation and spawning in endangered golden mahseer (Tor putitora): A silver-lining in the strangled conservation efforts of decades”, Aqua-culture, v. 497, pp. 336–347, Desember, 2018.

BASSO, A., HAMAD, F. A., GANESAN, P., “Effects of the geometrical configuration of air–water mix-er on the size and distribution of microbubbles in aeration systems”, Asia-Pac J Chem Eng, pp. 1-11, September, 2018.

BODNAR, T., GALDI, G.P., NECASOVA, S., Particles in Flows, 1 ed., Birkhäuser, Cham, Springer, 2017.

BUDHIJANTO, W., DARLIANTO, D., PRADANA, Y.S. & HARTONO, “M., Application of Micro Bub-ble Generator as Low Cost and Highly Efficient Aerator for Sustainable Fresh Water Fish Farming”, In: AIP Conference Proceedings, pp. 1-8, Indonesia, November. 2016.

CENGEL, YUNUS A., CIMBALA, J.M., Fluid Mechanics Fundamentals and Applications, 4 ed., New York, McGraw-Hill Education, 2017.

DAHRAZMA, B., NAGHEDINIA, A., GORJI, H. G., SAGHRAVANI, S. F., “Morphological and physiological responses of Cucumis sativus water with micro-nanobubbles”., Journal of Agricultural Science and Technology, v. 21, n. 1, pp. 181–192, Desember. 2019.

G. AMINI., “Liquid flow in a simplex swirl nozzle”, International Journal of Multiphase Flow, v. 79, pp. 225-35, Maret.2016.

GORDIYCHUK, A., SVANERA, M., BENINI, S., POESIO, P., “Size Distribution and Sauter Mean Diameter of Microbubble for a Venturi Type Bubble Generator”, Experimental Thermal and Fluid Science, v.70, pp. 51-60, Januari. 2016.

I. LEVITSKY, D. TAVOR, V. GITIS., “The Generation of Coarse Bubbles and Flow Instability Control by Means of a Novel Bubble Generator”, Chemical Engineering & Technology, v. 42, n. 1, pp. 1537-44, Maret. 2019.

JUWANA .W.E., INDARTO., DEENDARLIANTO., BUDHIJANTO. W., WIDYATAMA. A., “Hydrodinamic characteristics of the microbubble dissolution in liquid using orifice type MBG”, Journal of Chemical Engineering Research and Design , v. 41, pp. 436-448, November. 2018.

KAYAALP, N., OZTURKMEN, G., “A Venturi device reduces membrane fouling in a submerged membrane bioreactor”, Water Sci Technol, v. 74, n. 1, pp. 147–156, Maret. 2016.

KAYA, Y., BACAKSIZ, A. M., BAYRAK, H., GÖNDER, Z. B., VERGILI, I., HASAR, H., YILMAZ, G. “Treatment of chemical synthesis-based pharmaceutical wastewater in an ozonation-anaerobic membrane bioreactor (AnMBR) system”. Chem Eng J, v.322, pp. 293–301, Maret. 2017.

M. ANSARI, H. BOKHARI, D.E. TURNEY., “Energy efficiency and performance of bubble generating systems Chemical Engineering and Processing”, Process Intensification, v. 125, p. 44-55, Maret. 2018.

MAWARNI D.I., JUWANA. W.E., INDARTO., DARLIANTO, D., ABDAT A., “Experimental Study of the Effect of the Swirl Flow on the Characteristics of MBG Orifice Type”, In: AIP Conference Proceedings, pp. 1-8, Indonesia, Juli. 2020.

MILLS, C. S. L., SCHLEGEL, J. P., “Interfacial area measurement with new algorithm for grouping bubbles by diameter”, Exp Comput Multiph Flow, v. 1, n. 1, pp. 61–72, Desember. 2019.

MITRA, S., DALTROPHE, N. C., GILRON, J., “A novel eductor-based MBR for the treatment of domestic wastewater”, Water Res, v. 100, p. 65–79, April. 2016.

REIS, A. S., BARROZO, M. A. S., “A study on bubble formation and its relation with the performance of apatite flotation”. Sep Purif Technol, v. 161, p. 112–120, Januari. 2016.

TEMESGEN, T., “Micro and nanobubble technologies as a new horizon for water-treatment”, Advances in Colloid and Interface Science, v.246, p. 40-51, Agustus. 2017.

XU X., YANG Q., GE X., QIAN Y., ZHANG B., WANG H., “Effect of nozzle diameter on bubble generation with gas self-suction through swirling flow”, Chemical Engineering Research and Design, v. 138, p. 13-20, Oktober. 2018.