Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(6), 89-96 | DOI: 10.11118/actaun201260060089

Use of G-phase for biogas production

Martina Haitl¹, Tomáš Vítěz¹, Tomáš Koutný¹, Radovan Kukla¹, Tomáš Lošák², Ján Gaduš³

¹ Ústav zemědělské, potravinářské a environmentální techniky, Mendelova univerzita v Brně Zemědělská 1, 613 00, Brno, Česká republika

² Ústav agrochemie, půdoznalství, mikrobiologie a výživy rostlin, Mendelova univerzita v Brně Zemědělská 1, 613 00, Brno, Česká republika

³ Slovenská poľnohospodárska univerzita v Nitre, Katedra konštruovania strojov, Trieda A. Hlinku 2, 949 76 Nitra, Slovensko

Biogas is very promising renewable energy resource. The number of biogas plants increase every year. Currently there is a demand for new ways of organic waste treatment from production of different commodities. One of the technologies which produce waste is biodiesel production. One of the wastes from the biodiesel production is G-phase which is mainly consisted from glycerol and methanol. The aim of work was to find the effect of G-phase addition, to fermented material, on biogas resp. methane production. Two lab-scale batch anaerobic fermentation tests (hydraulic retention time 14 and 22 days) under mesophilic temperature conditions 38.5 °C have been performed. The positive effect of G-phase addition to methane production has been found. G-phase was added in three different amounts of inoculums volume 0.5 %, 1% and 1.5 %. The highest absolute methane production has been achieved by 1.5 % addition of G-phase. However it was also found difference in specific methane production due to use of different inoculum consisted of swine or cow manure. The specific methane production in hydraulic retention time of 14 days has been for the same G-phase dose 1.5 % higher for swine manure, 0.547 m³∙kg^-1 of organics solids compare with cow liquid manure 0.474 m³∙kg^-1 of organics solids.

Keywords: biogas, biodiesel, waste, G-phase, fermentation

Grants and funding:

This study was financed by the Internal Grant Agency of the Faculty of Agronomy MENDELU in Brno No. TP 9/2011, by the Research plan No. MSM6215648905 'Biological and technological aspects of sustainability of controlled ecosystems and their adaptability to climate change', which is finance by the Ministry of Education, Youth and Sports of the Czech Republic and by the Sixth Framework Programme of the European Community for research, technological development and demonstration activities (2007-2017), No. 7AMB12SK076 Production of biogas from non-traditional biodegradable materials.

Received: July 19, 2012; Prepublished online: July 19, 2013; Published: July 20, 2013  Show citation