Enzymatic and catalytic enhancement of methane production from corn silage and grain residues
2017
Dubrovskis, V., Latvia Univ. of Agriculture, Jelgava (Latvia) | Plume, I., Latvia Univ. of Agriculture, Jelgava (Latvia)
Many biogas plants used corn silage and grain processing (dryers) residues as a raw material. Hydraulic retention time working with such raw materials is relatively long and requires large volumes of bioreactors. Variety of additives can be used to improve the anaerobic digestion process. This article shows the results of the study where the enzyme mixture and catalyst Metaferm are used for the digestion process enhancement. Corn silage and grain processing residues were digested in 0.72 l bioreactors at temperature 38 o C in the batch mode process. 2 bioreactors were for control purposes and contained inoculums only. The other 14 bioreactors contain biomass substrates without/with added enzyme mixture or catalyst Metaferm. Addition of enzyme mixture (0.5 g) in bioreactors with corn silage or grain processing residues increases the average methane yield by 7.76 % or 4.48 % respectively. Addition of catalyst Metaferm (1 ml) into bioreactors with corn silage or grain processing residues increases the average methane yield by 1.79 % or 6.72 % respectively.
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