Aarhus University Seal / Aarhus Universitets segl

René Gislum

The effect of harvest time, dry matter content and mechanical pretreatments on anaerobic digestion and enzymatic hydrolysis of miscanthus

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Miscanthus x giganteus was harvested as both green and mature biomass and the dry matter content of the driest harvest was artificially decreased by adding water in two subsamples, giving a total of five dry matter contents. All five biomass types were mechanically pretreated by roller-milling, extrusion or grinding and accumulated methane production and enzymatically-accessible sugars were measured. Accumulated methane production was studied using sigmoid curves that allowed comparison among the treatments of the rate of the methane production and ultimate methane yield.

The green biomass gave the highest methane yield and highest levels of enzymatically-accessible cellulose. The driest biomass gave the best effect from extrusion but with the highest energy consumption, whereas roller-milling was most efficient on wet biomass. The addition of water to the last harvest improved the effect of roller-milling and equalled extrusion of the samples in efficiency.
Original languageEnglish
JournalBioresource Technology
Volume218
Pages (from-to)1008-1015
Number of pages8
ISSN0960-8524
DOIs
Publication statusPublished - 2016

    Research areas

  • Extrusion, Roller-milling, Methane, Energy crop, Sigmoid growth curves, klim

See relations at Aarhus University Citationformats

ID: 101573945