Jurij Gostiša (Avtor), Mojca Zupanc (Avtor), Matevž Dular (Avtor), Brane Širok (Avtor), Meta Levstek (Avtor), Benjamin Bizjan (Avtor)

Povzetek

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.

Ključne besede

hydrodynamic cavitation;wastewater treatment;pinned disc reactors;flow visualization;performance evaluation;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 532.528
COBISS: 70807811 Povezava se bo odprla v novem oknu
ISSN: 1350-4177
Št. ogledov: 446
Št. prenosov: 159
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: hidrodinamska kavitacija;odpadne vode;kavitacijski reaktorji;turbostroji;vizualizacija;učinkovitost razgradnje KPK;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-11
Zvezek: ǂVol. ǂ77
Čas izdaje: Sept. 2021
DOI: 10.1016/j.ultsonch.2021.105669
ID: 13163783