Digestate influence after biogas production on soil parameters

Energy demands of society pun pressure on the use of alternative ways of getting the energy. From this point of view, the controlled anaerobic fermentation seems to be the perspective biotechnology: The final product of this process is an energy valuable raw - biogas and bio sludge. There was experimentally tested an influence of bio sludge on hydrophysical characteristics at the field condition of site Barca (Slovak Republic) with clav-loam soil. Based on the obtained results from three-year field experiment can be concluded that the application of the bio sludge on the soil does not contribute to the deterioration of soil hydrophysical properties. There was observed a positive effect on these properties, with observed increase of average value of capillary suction capacity, field capacity, porosity, non-capillary porosity and hydraulic conductivity. There was also observed decrease of average values of ρs and ρd. (author)