US 11,807,555 B2
Method and device for disinfection of liquid
Gregor Primc, Ljubljana (SI); Rok Zaplotnik, Ljubljana (SI); Miran Mozetic, Ljubljana (SI); Arijana Filipic, Ljubljana (SI); Ion Gutierrez Aguirre, Ljubljana (SI); David Dobnik, Ljubljana (SI); Matevz Dular, Ljubljana (SI); and Martin Petkovsek, Ljubljana (SI)
Assigned to Jozef Stefan Institute, Ljubljana (SI); National Institute of Biology, Ljubljana (SI); and University of Ljubljana, Ljubljana (SI)
Filed by Jozef Stefan Institute, Ljubljana (SI); National Institute of Biology, Ljubljana (SI); and University of Ljubljana, Ljubljana (SI)
Filed on Oct. 6, 2021, as Appl. No. 17/494,991.
Claims priority of application No. 20200482 (EP), filed on Oct. 7, 2020.
Prior Publication US 2022/0106206 A1, Apr. 7, 2022
Int. Cl. C02F 1/34 (2023.01); C02F 1/30 (2023.01); C02F 1/46 (2023.01)
CPC C02F 1/34 (2013.01) [C02F 1/30 (2013.01); C02F 1/4608 (2013.01); C02F 2303/04 (2013.01); C02F 2305/023 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A liquid treatment device comprising:
(a) a wedge-shaped nozzle with a two-part divergent portion positioned downstream of a narrowest portion of the nozzle, wherein a divergent angle of a first part of the two-part divergent portion closer to the narrowest portion of the nozzle is in the range 3° to 20°, and a divergent angle of a second part of the two-part divergent portion further from the narrowest portion of the nozzle is in the range 10° to 40°, and a speed of liquid is between 50 and 500 m/s, to sustain a single, stable cavitation bubble due to vaporisation phenomena caused by a 4- to 50-times reduction in static pressure in the liquid after the liquid passes the narrowest portion of the nozzle; and
(b) one or more electrodes configured to penetrate the single, stable cavitation bubble so that there is no direct electrical contact between the one or more electrodes and the liquid, the one ore more electrodes being configured to generate a continuous gaseous discharge within the single, stable cavitation bubble.