Balázs KAKUK, Orsolya STRANG, Norbert ÁCS, Etelka KOVÁCS, Gábor RÁKHELY, Kornél L. KOVÁCS, Zoltán BAGI (Ungaria)
Rezumat
Porumbul este cultivat in cantitati semnificative cu scop nutritiv; produsele intermediare rezultate sunt
planta de porumb ce este de obicei nefolosita. Datorita cantitatilor mari existente si a continutului ridicat de celuloza
acesta reprezinta un potential substrat pentru producerea de biogaz. In orice caz, aceasta biomasa bogata in
celuloza nu este utilizata in fermentatoarele anaerobe datorita insolubilitatii sale ridicate. Ea forme4aza o crusta la
suprafata fazei lichide in reactoare ce are ca rezultat inhibarea procesului de producere a biogazului. Deoarece
continutul ridicat de materii solide inhiba procesul formare a biogazului la scara industriala este necesara realizarea
unui pretratament. Astfel, digestia anaeroba a plantei de porumb poate un mod eficient, economic si cu impact
pozitiv asupra mediului de valorificare a deseurilor agricole pe langa producerea unui biocombustibil regenerabil
valoros. In studiul nostru, o bacterie celulozica a fost utilizata pentru pretratarea biomasei bogata in celuloza si a
fost masurat impactul pe care il are acest proces asupra fermentatiei anaerobe a substratului.
Cuvinte cheie: pretratamentplanta de porumbcelulozadigestie anaerobabiogaz.
Abstract
Keywords: Maize is grown in large quantities for nutritional purposeits agricultural by-product is the corn stoverwhich is usually unused. Because of its high abundance and high cellulose contentit is a promising substrate for biogas production. Howeverthis cellulose-rich biomass is not used in anaerobic fermentors todaydue to its insolubility. It forms a solid crust at the top of the liquid phase in the reactorswhich results in the inhibition of biogas formation. Since the high solid-content inhibits the industrial-scale fermentation of corn stoversome kind of pretreatment is considered necessary. Therefore the anaerobic digestion of the corn stover could be an effectiveeconomically profitable and environmentally friendly way of disposing agricultural wastes - besides producing a valuable renewable biofuels. In our studya cellulolytic bacterium has been used for the pretreatment of the cellulose-rich biomass and the impact on the anaerobic fermentation of the substrate was measured.
Résumé
Pretreatment; Corn stover; Cellulose; Anaerobic Digestion, Biogas
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