US 11,890,586 B2
Fine bubble generation device and method for generating fine bubbles
Tomohito Mizukami, Kakegawa (JP); Yusuke Saito, Kakegawa (JP); and Nobuyuki Mase, Hamamatsu (JP)
Assigned to CATALER CORPORATION, Kakegawa (JP); and NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY, Shizuoka (JP)
Appl. No. 17/272,549
Filed by CATALER CORPORATION, Kakegawa (JP); and NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY, Shizuoka (JP)
PCT Filed Sep. 9, 2019, PCT No. PCT/JP2019/035418
§ 371(c)(1), (2) Date Mar. 1, 2021,
PCT Pub. No. WO2020/054680, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 2018-169968 (JP), filed on Sep. 11, 2018.
Prior Publication US 2021/0322937 A1, Oct. 21, 2021
Int. Cl. B01F 25/452 (2022.01); B01F 23/232 (2022.01)
CPC B01F 25/45221 (2022.01) [B01F 23/232 (2022.01); B01F 2215/0431 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fine bubble generation method using a fine bubble generation device comprising a porous body having continuous pores, a liquid supply part which supplies a liquid to the porous body and causes the liquid to flow through the continuous pores, and a liquid discharge part which discharges the liquid caused to flow through the continuous pores, wherein
an average flow diameter of the porous body as measured with a palm porometer is 5 μm to 50 μm, and
the average flow diameter is an average of the pore diameters of a smallest part of the continuous pores in the porous body,
the method comprising the steps of:
supplying a liquid in which a gas is already dissolved to the porous body from the liquid supply part of the fine bubble generation device, and
causing the supplied liquid to flow through the continuous pores of the porous body to obtain a liquid containing fine bubbles from the liquid discharge part, wherein
the fine bubbles are derived from the gas during passage of the supplied liquid through the porous body, and
the fine bubbles emerge from the porous body with an average particle diameter of less than 1 μm.