The potential of ozonation to reduce impact of waste sludge-entrapped microplastics to biogas production

Lekše, Nina (avtor), Griessler Bulc, Tjaša (avtor), Žgajnar Gotvajn, Andreja (avtor)

Due to low degradability of plastic materials, high usage, and low cost, microplastics (MPs) is becoming ubiquitous environmental pollutant. Wastewater treatment plants (WWTP) are one of main sources, where most of the MPs from wastewaters ends in waste sludge. Anaerobic digestion is one of most promised techniques of waste sludge management. The aim of this paper was to evaluate the impact of polyethylene terephthalate (PET) and polypropylene (PP) microplastics in the waste sludge with and without ozonation as possible pretreatment, on biogas and methane production with OxiTop® method. In the first set of experiments, PET inhibited (up to 6% at 0.1 g $L^{−1}$) or promoted (up to 3% at 1 g $L^{−1}$) methane production but increased cumulative biogas production (up to 38% at 0.5 g $L^{−1}$). PP inhibited methane production (up to 5% at 0.5 g $L^{−1}$) but its impact on biogas production was dependent upon concentration of MPs added. In the second set of experiments, pretreatment of non-contaminated waste sludge by ozonation (3.54 $g_{ozone}$ $h^{−1}$) inhibited methane yield. Longer time of ozonation of PP-contaminated waste sludge reduced inhibition of methane yield, while in the case of PET-contaminated waste sludge, it was increased.

• Jezik: Angleški jezik
• Ključne besede: biogas production, methane yield, ozonation, polyethylene terewphthalate, polypropylene, waste sludge
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 1-12
• Številčenje: Vol. , iss.
• PID: 20.500.12556/RUL-155486
• UDK: 66.094.3-926.214
• ISSN pri članku: 0191-9512
• DOI: 10.1080/01919512.2024.2332286
• COBISS.SI-ID: 191347203
• Datum objave v RUL: 04.04.2024

Gradivo je del revije

• Naslov: Ozone: science & engineering
• Skrajšan naslov: Ozone: sci. eng.
• Založnik: Taylor & Francis
• ISSN: 0191-9512
• COBISS.SI-ID: 2223382

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: proizvodnja bioplina, donos metana, ozonacija, polietilenteraftalat, polipropilen, odpadno blato