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Magnetic Iron Oxide Nanoparticle Enhanced Microwave Pretreatment for Anaerobic Digestion of Meat Industry Sludge

Jákói, Zoltán Péter and Hodúr, Cecília and Beszédes, Sándor (2024) Magnetic Iron Oxide Nanoparticle Enhanced Microwave Pretreatment for Anaerobic Digestion of Meat Industry Sludge. SCIENTIFIC REPORTS, 14. No.-10723. ISSN 2045-2322

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Abstract

Our study investigates the effects of iron oxide (Fe3O4) nanoparticles combined microwave pretreatment on the anaerobic digestibility and soluble chemical oxygen demand (SCOD) of meat industry sludge. One of our main objectives was to see whether the different microwave-based pretreatment procedures can enhance biogas production by improving the biological availability of organic compounds. Results demonstrated that combining microwave irradiation with magnetic iron oxide nanoparticles considerably increased SCOD (enhancement ratio was above 1.5), the rate of specific biogas production, and the total cumulative specific biogas volume (more than a threefold increment), while having no negative effect on the biomethane content. Furthermore, the assessment of the sludge samples’ dielectric properties (dielectric constant and loss factor measured at the frequency of 500 MHz) showed a strong correlation with SCOD changes (r = 0.9942, R 2 = 0.99), offering a novel method to evaluate pretreatment efficiency.

Item Type: Article
Uncontrolled Keywords: Meat industry sludge, Anaerobic digestion, Microwave pretreatment, Iron oxide nanoparticles, Dielectric assessment
Subjects: T Technology / alkalmazott, műszaki tudományok > TD Environmental technology. Sanitary engineering / környezetvédelem, hulladékkezelés, egészségügyi mérnöki technika (ivóvízellátási és szennyvízkezelési technika)
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 30 May 2024 06:59
Last Modified: 30 May 2024 06:59
URI: https://real.mtak.hu/id/eprint/196130

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