A review on rotary generators of hydrodynamic cavitation for wastewater treatment and enhancement of anaerobic digestion process

Blagojevič, Marko (author), Rak, Gašper (author), Bizjan, Benjamin (author), Kolbl Repinc, Sabina (author)

The issue of ever-increasing amounts of waste activated sludge (WAS) produced from biological wastewater treatment plants (WWTPs) is pointed out. WAS can be effectively reduced in the anaerobic digestion (AD) process, where methanogens break down organic matter and simultaneously produce biogas in the absence of oxygen, mainly methane and CO2 . Biomethane can then be effectively used in gas turbines to produce electricity and power a part of WWTPs. Hydrodynamic cavitation (HC) has been identified as a potential technique that can improve the AD process and enhance biogas yield. Rotary generators of hydrodynamic cavitation (RGHCs) that have gained considerable popularity due to their promising results and scalability are presented. Operation, their underlying mechanisms, parameters for performance evaluation, and their division based on geometry of cavitation generation units (CGUs) are presented. Their current use in the field of wastewater treatment is presented, with the focus on WAS pre/treatment. In addition, comparison of achieved results with RGHCs relevant to the enhancement of AD process is presented.

• Language: English
• Keywords: wastewater treatment, waste activated sludge, anaerobic digestion, biomethane, rotary generator of hydrodynamic cavitation
• Work type: Article
• Typology: 1.02 - Review Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 27 str.
• Numbering: Vol. 11, iss. 2, art. 514
• PID: 20.500.12556/RUL-146365
• UDC: 628.3
• ISSN on article: 2227-9717
• DOI: 10.3390/pr11020514
• COBISS.SI-ID: 141131011
• Publication date in RUL: 25.05.2023

Record is a part of a journal

• Title: Processes
• Shortened title: Processes
• Publisher: MDPI
• ISSN: 2227-9717
• COBISS.SI-ID: 523353113

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 25.05.2023

Secondary language

• Language: Slovenian
• Title: Pregled rotacijskih generatorjev hidrodinamične kavitacije za čiščenje odpadne vode in izboljšanje procesa anaerobne presnove
• Keywords: hidrodinamska kavitacija, odpadna voda, aktivno blato, anaerobna presnova, biometan, rotacijski generator hidrodinamske kavitacije

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0180
• Name: Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij