Anaerobna digestija lignoceluloznih materialov s predobdelavo z glivami lesne trohnobe

diplomsko delo univerzitetnega študijskega programa 1. bolonj. st.

Jernej Rotar (Avtor), Zdravko Kravanja (Mentor), Lidija Čuček (Komentor)

Povzetek

Lignocelulozni materiali (les, slama, stebla alternativnih rastlin, različni agroživilski ostanki) lahko vsebujejo velik delež lignina, ki ga bakterije težko predelujejo v bioplin. Zato ostane lignin neizkoriščen pri anaerobni razgradnji materiala. S predobdelavo z različnimi glivami ga je mogoče pretvoriti v obliko, ki je primernejša za bakterije. Tako predobdelan lignin bakterije bolje izkoristijo in ga lažje predelajo v bioplin. V laboratorijskem merilu smo želeli izboljšati učinkovitost proizvodnje bioplina iz lignoceluloznih materialov. Kot substrat smo uporabili les, ki smo ga predhodno predobdelali z glivama Trametes versicolor in Hypoxylon fragiforme. Naredili smo tudi nekaj mešanic substrata s piščančjim gnojem ter proučili vpliv na proizvodnjo bioplina. Za primerjavo smo uporabili rezultate, dobljene z uporabo neobdelanih substratov ter čiste celuloze in inokuluma. Proučevali smo vpliv deleža lignina v lignoceluloznih materialih na količino nastalega bioplina v procesu anaerobne digestije. Poleg tega smo spremljali potek anaerobne digestije in nastajanja bioplina ter časovno spremembo vsebnosti lignina v lignoceluloznih materialih obdelanih z glivo in med procesom anaerobne digestije. Ugotovili smo, da je pri anaerobni digestiji obdelanega lesa nastalo nekoliko več bioplina kot pri neobdelanem. Če primerjamo predobdelavo z glivama, je proizvodnja bioplina iz predobdelanega materiala z glivo Hypoxylon fragiforme višja, kot iz predobdelanega materiala z glivo Trametes versicolor. Dodatek piščančjega gnoja k lesu pa ima učinkovit vpliv na donos bioplina.

Ključne besede

lignocelulozni materiali;lignin;bioplin;predobdelava z glivami;anaerobna digestija;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2014
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik:	[J. Rotar]
UDK:	628.336.6:678.034(043.2)
COBISS:	18239510
Št. ogledov:	1634
Št. prenosov:	217
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	ANAEROBIC DIGESTION OF LIGNOCELLULOSIC MATERIALS BY FUNGI PRE-TREATMENT
Sekundarni povzetek:	Lignocellulosic materials (wood, straw, stalks of alternative crops, various agri-residues) may contain large proportions of lignin that are difficult for bacteria to convert into biogas. Therefore, lignin remains non-utilised during the anaerobic decompositions of material. However, following pre-treatment with different fungi lignin it could be converted into a form which is more suitable for the bacteria. Pre-treated lignocellulosic material is easier to be used by bacteria and the material could be more easily converted into biogas. On the laboratory scale the efficiencies of biogas from lignocellulosic materials were attempted at being improved. Wood was used as a substrate, which was pre-treated with the fungi Trametes Versicolor and Hypoxylon fragiforme. Also several mixtures of a substrate with chicken manure were analysed, and the impacts were studied of those mixtures on biogas production. The results obtained by using untreated substrates, pure cellulose and inoculum were used for comparison. The influences of lignin proportions within the lignocellulosic material were studied in regard to the quantities of biogas produced during the anaerobic digestion process. The progress of anaerobic digestion and biogas formation were monitored as well as temporal variations of the lignin content in those lignocellulosic materials pre-treated by fungi and during the anaerobic digestion process. It was discovered that slightly more biogas was produced during the anaerobic digestion of pre-treated wood tham during that of non pre-treated wood. Biogas production from the pre-treated material with fungus Hypoxylon fragiforme was higher than that pre-treated with a fungus Trametes versicolor. The addition of chicken manure to the wood had an effective impact on biogas yield.
Sekundarne ključne besede:	lignocellulosic materials;lignin;biogas;fungi pre-treatment;anaerobic digestion;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Diplomsko delo/naloga
Komentar na gradivo:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Strani:	XII, 52 str.
ID:	8729976