Možnost uporabe odpadnega jedilnega olja za pridobivanje bioplina

Abstract

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.

Keywords

odpadno jedilno olje;bioplin;anaerobna presnova;čistilna naprava;odvečno blato;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	662.767.2:628.16(078.7)
COBISS:	101746179
ISSN:	1581-0267
Views:	197
Downloads:	30
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Possibility of using waste edible oil for biogas production
Secondary 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.
Secondary keywords:	waste edible oil;biogas;anaerobic digestion;wastewater treatment plant;wastewater sludge;
Type (COBISS):	Article
Pages:	str. 139-156
Volume:	ǂLetn. ǂ34
Issue:	ǂšt. ǂ61
Chronology:	2021
DOI:	10.15292/acta.hydro.2021.10
ID:	14843851