The effect of temperature on production of biogas from ensiled sugar beet noodles

Šećerna repa kao supstratna podloga za bioplinska postrojenja do sada je bila podcijenjena. Sve se više smatra supstratom za proizvodnju bioplina zbog prednosti visokog prinosa biomase, i dobre fermentiranosti. Kemijski sastav šećerne repe i njezino ponašanje pri raspadanju značajno se razlikuju od ostalih biljnih kultura. Cilj istraživanja je utvrditi utjecaj temperature na dinamiku proizvodnje bioplina iz siliranog repinog rezanca, utvrditi količine suhe tvari i pH u supstratu prije i nakon fermentacije pri mezofilnim i termofilnim uvjetima. Istraživanje je provedeno diskontinuiranim procesom pri mezofilnim (37°C) i termofilnim (55°C) uvjetima uz retencijsko vrijeme od 62 dan. Za istraživanje su se koristili goveđa gnojovka (475 g) i silirani repin rezanac (25g). Temeljem provedenog istraživanja, utvrđeno je da je dodavanjem siliranih repinih rezanaca došlo do porasta u proizvodnji bioplina. Proizvodnja bioplina odvijala se bolje u termofilnim nego u mezofilnim uvjetima. Ukupna prosječna vrijednost proizvedenog bioplina u kontrolnim skupinama pri termofilnim uvjetima iznosi (KT) 8421,75 ml/500 ml, dok u eksperimentalnim skupinama pri termofilnim uvjetima iznosi (SRRT) 11195 ml/500. Prinos bioplina u odnosu na kontrolnu grupu KT bolji su kod skupine sa dodatkom siliranog repinog rezanca..Sugar beet as a substrate for biogas plants has been so far underestimated. It is increasingly considered a substrate for biogas production due to its advantages of high biomass yield, and good fermentation properties. The chemical composition of sugar beet and its decomposition behavior differ significantly from other cultivated plants. The aim of the research is to determine the influence of temperature on the dynamics of biogas production from ensiled beet pulp, to determine the amounts of total solids and pH in the substrate before and after fermentation under mesophilic and thermophilic conditions. The study was done under discontinuous process under mesophilic (37 ° C) and thermophilic (55 ° C) conditions with a retention time of 62 days. Cattle manure (475 g) and ensiled beet pulp (25 g) were used for the study. Based on the conducted research it was determined that the addition of ensiled beet pulp increased the production of biogas. Biogas production was better under the thermophilic than the mesophilic conditions. The total average value of biogas produced in the control groups under thermophilic conditions waas (KT) 8421.75 ml / 500 ml, while in the experimental groups under thermophilic conditions was (SRRT) 11195 ml / 500. The biogas yield compared to the KT control group was better in the group with the addition of ensiled beet pulp