20.500.12556/RUL-128668 Investigation into cavitational intensity and COD reduction performance of the pinned disc reactor with various rotor-stator arrangements In this study, the hydrodynamic cavitation and wastewater treatment performance of a rotary generator with pin disk for hydrodynamic cavitation are investigated. Various geometrical features and arrangements of rotor and stator pins were evaluated to improve the configuration of the cavitation device. The pilot device used to perform the experiments was upgraded with a transparent cover that allows visualization of the hydrodynamic cavitation in the rotor-stator region with high-speed camera and simultaneous measurement of pressure fluctuations. Based on the hydrodynamic characteristics, three arrangements were selected and evaluated with respect to the chemical effects of cavitation on a 200-liter wastewater influent sample. The experimental results show that the rotational speed and the spacing of the rotor pins have the most significant effect on the cavitation intensity and effectiveness, while the pin diameter and the surface roughness are less significant design parameters. Cavitation intensity increases with pin velocity, but can be inhibited if the pins are arranged too close together. At best configuration, COD was reduced by 31% in 15 liquid passes, consuming 8.2 kWh/kg COD. The number of liquid passes also proved to be an important process parameter for improving the energy efficiency. hydrodynamic cavitation wastewater treatment pinned disc reactors flow visualization performance evaluation hidrodinamska kavitacija odpadne vode kavitacijski reaktorji turbostroji vizualizacija kemijska potreba po kisiku KPK učinkovitost razgradnje KPK true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-22 12:10:05 2021-07-22 12:10:08 2023-03-28 10:41:37 0000-00-00 00:00:00 2021 0 0 11 str. Vol. 77, art. 105669 Sep. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.528 1350-4177 10.1016/j.ultsonch.2021.105669 70807811 RAZ_Gostisa_Jurij_2021.pdf RAZ_Gostisa_Jurij_2021.pdf 1 5CE91A8881350D30CEF6080B82FC837A 7414aa6c0614913a40115e8d947d77a51deb9ad3b697f025f10a7336be7f1f66 2f946b5d-ead9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145480 https://www.sciencedirect.com/science/article/pii/S135041772100211X 0 d4ffb0da-ead4-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145478 Fakulteta za strojništvo 0 0 0