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Investigation into cavitational intensity and COD reduction performance of the pinned disc reactor with various rotor-stator arrangements
Gostiša, Jurij (Avtor), Zupanc, Mojca (Avtor), Dular, Matevž (Avtor), Širok, Brane (Avtor), Levstek, Meta (Avtor), Bizjan, Benjamin (Avtor)

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:hydrodynamic cavitation, wastewater treatment, pinned disc reactors, flow visualization, performance evaluation
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2021
Št. strani:Str. 1-11
Številčenje:Vol. 77
UDK:532.528
ISSN pri članku:1350-4177
DOI:10.1016/j.ultsonch.2021.105669 Povezava se odpre v novem oknu
COBISS.SI-ID:70807811 Povezava se odpre v novem oknu
Število ogledov:73
Število prenosov:38
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Ultrasonics Sonochemistry
Skrajšan naslov:Ultrason. sonochem.
Založnik:Butterworth-Heinemann, Elsevier Science
ISSN:1350-4177
COBISS.SI-ID:707668 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0401
Naslov:Energetsko strojništvo

Financer:Drugi - Drug financer ali več financerjev
Program financ.:UL inovacijski sklad
Številka projekta:820-1/2020-35

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:hidrodinamska kavitacija, odpadne vode, kavitacijski reaktorji, turbostroji, vizualizacija, učinkovitost razgradnje KPK

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