Možnost uporabe odpadnega jedilnega olja za pridobivanje bioplina

Kolbl Repinc, Sabina (author)

Anaerobna presnova je proces, s katerim lahko iz organsko razgradljivih odpadnih snovi ponovno pridobimo energijo v obliki bioplina. Nekontrolirano odlaganje biološko razgradljivih odpadkov je za okolje lahko zelo obremenjujoče. V Sloveniji letno proizvedemo večje količine odpadnega jedilnega olja, ki bi ga lahko izkoristili za proizvodnjo bioplina. V tej študiji smo izvedli meritve metanskega potenciala odpadnega jedilnega olja v šaržnem eksperimentu. V pilotnem semikontinuirnem eksperimentu smo ocenili primernost odpadnega jedilnega olja za uporabo v anaerobnih reaktorjih na čistilni napravi. Rezultati študije kažejo, da je količina jedilnega olja, ki ga dnevno lahko doziramo v anaerobne reaktorje, omejena, saj močno vpliva na stabilnost procesa anaerobne presnove in na proizvodnjo bioplina. Izkazalo se je, da je najbolj optimalna obremenitev anaerobnega reaktorja z jedilnim oljem znašala med 1,6 in 2,4 g OS/L inokuluma. Takrat je proces anaerobne presnove deloval stabilno, produkcija bioplina je bila največja. Pri večji obremenitvi je prišlo do velikih nihanj v sistemu, zmanjšanja pH, povečanja hlapnih maščobnih kislin, povišanih vrednosti KPK na iztoku iz reaktorja in bistveno zmanjšane proizvodnje bioplina.

• Language: Slovenian
• Keywords: odpadno jedilno olje, bioplin, anaerobna presnova, čistilna naprava, odvečno blato
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 17.03.2022
• Year: 2021
• Number of pages: Str. 139-156
• Numbering: Letn. 34, št. 61
• PID: 20.500.12556/RUL-135687
• UDC: 662.767.2:628.16(078.7)
• ISSN on article: 1581-0267
• DOI: 10.15292/acta.hydro.2021.10
• COBISS.SI-ID: 101746179
• Publication date in RUL: 25.03.2022

KOLBL REPINC, Sabina, 2021, Možnost uporabe odpadnega jedilnega olja za pridobivanje bioplina. Acta hydrotechnica [online]. 2021. Vol. 34, no. 61, p. 139–156. [Accessed 18 March 2025]. DOI 10.15292/acta.hydro.2021.10. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=135687

Record is a part of a journal

• Title: Acta hydrotechnica
• Shortened title: Acta hydrotech.
• Publisher: Fakulteta za gradbeništvo in geodezijo
• ISSN: 1581-0267
• COBISS.SI-ID: 1838689

Licences

• License: CC BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Description: A Creative Commons license that bans commercial use and requires the user to release any modified works under this license.
• Licensing start date: 17.03.2022

Secondary language

• Language: English
• Title: Possibility of using waste edible oil for biogas production

Abstract

Anaerobic digestion is a process by which energy from organically degradable waste can be recovered in the form of biogas. The uncontrolled disposal of such organic waste is very burdensome to the environment. In Slovenia, large quantities of waste edible oils are produced every year, which could be used for biogas production. In this study, we investigated the methane potential of waste edible oil in a batch reactor. Further in the pilot scale in a semi-continuous experiment we evaluated the use of waste edible oil in anaerobic digesters of wastewater treatment plant. The results show that the quantity of oil per day that is fed into the anaerobic reactor is limited due to the process's instability and lower biogas production. The optimal daily organic loading of waste edible oil was between 1.6 and 2.4 g VS/L inoculum. During these conditions, the process of anaerobic digestion was stable and methane production was highest. At higher organic loading, the process became unstable, pH was reduced, volatile fatty acids increased, COD at the outflow of reactor increased, and biogas production was significantly reduced.

• Keywords: waste edible oil, biogas, anaerobic digestion, wastewater treatment plant, wastewater sludge