Res. Agr. Eng., 2014, 60(2):60-67 | DOI: 10.17221/72/2012-RAE

Evaluation of the influence of fermentation input substrates preparation on biogas production intensityOriginal Paper

D. Sochr¹, R. Adamovský², J. Kára³, I. Hanzlíková³

¹ Blue Power - Energetické systémy s.r.o., Nenačovice, Czech Republic

² Department of Mechanical Engineering, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic

³ Research Institute of Agricultural Engineering, Prague, Czech Republic

The article is aimed at verification of the effect of chaff length of fermented material and duration time of the contact of material with oxygen before dosing into the fermenter, on production and energy content of biogas. The results of the verification showed an effect of chaff length in the fermented material on production and energy content of the biogas at processing grass silage with high content of dry-matter and especially maize silage. When processing maize silage, optimal length of chaff in terms of production and energy content of biogas was 13 mm, with grass silage it was from 69 to 112 mm. Verification of the influence of time of grass silage and maize silage contact with air oxygen before dosing into the fermenter did not confirm our hypothesis. It was demonstrated that production and energy content of the biogas increase together with the length of duration of 7 days compared to fermentation of material after max. 3 h of contact with air oxygen.

Keywords: biogas plant; energy crop; grass silage; maize silage; energy content

Published: June 30, 2014  Show citation