Mechanical Pretreatment to Increase the Bioenergy Yield for Full-scale Biogas Plants

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

311 Downloads (Pure)


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%.
Original languageEnglish
Publication date2015
Number of pages4
Publication statusPublished - 2015
Event14th World Congress on Anaerobic Digestion - Viña del Mar, Chile
Duration: 15 Nov 201518 Nov 2015


Conference14th World Congress on Anaerobic Digestion
City Viña del Mar

Fingerprint Dive into the research topics of 'Mechanical Pretreatment to Increase the Bioenergy Yield for Full-scale Biogas Plants'. Together they form a unique fingerprint.

Cite this