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Copyright of Acta Scientiarum Polonorum: Biotechnologia is the property of Wroclaw University of Environmental & Life Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The study evaluated possibilities of using sorghum biomass as a substrate for production of methane in agricultural biogas plants. Five different sorghum varieties, cultivated at two different localisations: Straszków and Śmiłów were analysed. The analysis of biochemical methane potential (BMP) indicated that in both localisations the best results were achieved in the case of Sucrosorgo variety of sorghum. Yield of methane from hectare was 8586 m3 ha-1 year-1 in location Straszków, and 7859 m3 ha-1 year-1 in location Śmiłów. The lowest yield from hectare and the lowest efficiency of methane from hectare in both locations were registered for the Akklimat variety (2320 m3 ha-1 year-1) and Nutri Honey (2762 m3 ha-1 year-1). The comparative analysis of the ERoEI index proved that the Sucrosorgo variety is definitely the most effective (8.71 at the Straszków location and 7.97 at the Śmiłów location) from the others in terms of energy efficiency. The energy efficiency of this variety is nearly four times higher than the least effective (Akklimat - 2.34). [ABSTRACT FROM AUTHOR]