This study investigated the efficiency of commercially available harvesting machines for mechanical pretreatment of meadow grass, in order to enhance the energy yield per hectare. Excoriator was shown to be the most efficient mechanical pretreatment increasing the biogas yield of grass by 16% compared to the untreated one. The digestion of meadow grass as an alternative co-substrate had positive impact on the energy yield of full-scale biogas reactors operating with cattle manure, pig manure or mixture of both. A preliminary analysis showed that the addition of meadow grass in a manure based biogas reactor was possible with biomass share of 10%, leading to energy production of 280 GJ/day. The digestion of pretreated meadow grass as alternative co-substrate had clearly positive impact in all the examined scenarios, leading to increased biogas production in the range of 10%-20%.
|Number of pages||4|
|Publication status||Published - 2015|
|Event||14th World Congress on Anaerobic Digestion - Viña del Mar, Chile|
Duration: 15 Nov 2015 → 18 Nov 2015
|Conference||14th World Congress on Anaerobic Digestion|
|City||Viña del Mar|
|Period||15/11/2015 → 18/11/2015|