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Title:Vpliv dodatka kovinskih nanodelcev na potek anaerobne digestije : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Menciger Kocbek, Neja (Author)
ID Goršek, Andreja (Mentor) More about this mentor... New window
ID Pečar, Darja (Comentor)
Files:.pdf UN_Menciger_Kocbek_Neja_2023.pdf (2,01 MB)
MD5: 0148848FE029E1850C1D6B6754106389
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Piščančji gnoj, ki mu je običajno dodana žagovina, je zelo pogost živalski odpadek, katerega uporabljajo kot vhodno surovino pri anaerobni digestiji. Dodana žagovina ima lignocelulozno strukturo, ki zavira proizvodnjo bioplina pri procesu anaerobne digestije. Mikroorganizmi namreč ne morejo razgraditi lignina, zato jim je onemogočen dostop do celuloze in hemiceluloze, ki ju med procesom pretvorijo v bioplin oziroma biometan. Ta predstavlja obnovljiv vir energije, ki ga lahko preoblikujemo v toplotno ali električno energijo. Pri anaerobni digestiji gre za transformacijo organskih trdnih odpadkov v energijo. V okviru diplomskega dela smo raziskovali vpliv dodatka Fe2O3 nanodelcev k mešanici surovin za anaerobno digestijo na proizvodnjo bioplina. Po podatkih iz literature dodatek kovinskih nanodelcev poveča proizvodnjo bioplina, saj vzpodbudi rast bakterij, njihovo aktivnost in sintezo ključnih encimov. Med dvajset-dnevnim procesom smo z metodo izpodrivanja vode spremljali proizvodnjo plina in nastali bioplin analizirali s plinsko kromatografijo. Določali smo volumski delež metana v bioplinu. Anaerobno digestijo smo izvedli pri 35 °C in 40 °C in tako preverili tudi vpliv temperature na proizvodnjo bioplina. Ugotovili smo, da dodatek Fe2O3 nanodelcev poveča proizvodnjo bioplina le v zgodnji fazi procesa, nato jo zavira. V reaktorju z dodanimi kovinskimi nanodelci smo pri obeh temperaturah zabeležili manjši volumen bioplina, kot v reaktorju brez nanodelcev. Pri 40 °C je v reaktorju brez nanodelcev nastalo več bioplina kot pri nižji temperaturi, medtem ko je v reaktorju z nanodelci pri 35 °C nastalo več bioplina kot pri 40 °C. Iz rezultatov meritev koncentracij metana v nastalem bioplinu vidimo, da je dodatek Fe2O3 nanodelcev pripomogel k povečanju deleža metana. Pri obeh nastavitvah eksperimenta je koncentracija metana v bioplinu iz reaktorja z dodanimi nanodelci bila precej višja.
Keywords:anaerobna digestija, kovinski nanodelci, bioplin, piščančji gnoj, Fe2O3 nanodelci
Place of publishing:Maribor
Place of performance:Maribor
Publisher:N. Menciger Kocbek]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (VIII, 28 f.))
PID:20.500.12556/DKUM-85134 New window
UDC:66.098.4:631.861(043.2)
COBISS.SI-ID:166231299 New window
Publication date in DKUM:06.09.2023
Views:366
Downloads:43
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:20.08.2023

Secondary language

Language:English
Title:The influence of metallic nanoparticles addition on the anaerobic digestion process
Abstract:Chicken manure, usually with sawdust added, is a very common animal waste used as a feedstock for anaerobic digestion. The added sawdust has a lignocellulosic structure, which inhibits biogas production in anaerobic digestion. Micro-organisms cannot break down the lignin, so they are denied access to the cellulose and hemicellulose, which are converted into biogas and biomethane during the process. This is a renewable source of energy that can be reconfigured into thermal or electrical energy. Anaerobic digestion is the transformation of organic solid waste into energy. In this thesis, the influence of the addition of Fe2O3 nanoparticles to the anaerobic digestion feedstock mixture on biogas production was investigated. According to literature data, the addition of metallic nanoparticles enhances biogas production by stimulating bacterial growth, activity and the synthesis of key enzymes. During the 20-day process, gas production was monitored using the water displacement method and the biogas produced was analysed by gas chromatography. The volume fraction of methane in the biogas was determined. Anaerobic digestion was carried out at 35 °C and 40 °C, to determine the effect of temperature on biogas production. We found that the addition of Fe2O3 nanoparticles increases biogas production only in the early phase of the process and then inhibits it. In the reactor with added metal nanoparticles, a lower biogas volume was observed at both temperatures than in the reactor without nanoparticles. At 40 °C, the reactor without nanoparticles produced a higher volume of biogas than at the lower temperature, while the reactor with nanoparticles produced more biogas at 35 °C than at 40 °C. The results of the measurements of the methane concentrations in the biogas produced showed that the addition of Fe2O3 nanoparticles helped to increase the methane fraction. In both experimental set-ups, the methane concentration in the biogas from the reactor with the added nanoparticles was significantly higher.
Keywords:anaerobic digestion, metallic nanoparticles, biogas, chicken manure, Fe2O3 nanoparticles


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