Co-ensiling of cover crops and barley straw for biogas production

Lu Feng, Yolanda Maria Lemes Perschke, Doline Fontaine, Alastair James Ward, Jørgen Eriksen, Peter Sørensen and Henrik Bjarne Møller

Renewable Energy, 2019, vol. 142, issue C, 677-683

Abstract: The study investigated the effect of co-ensiling of cover crops (CC) and barley straw (BS) on biogas production. Blends containing chopped CC and BS (mix ratios of 1:0, 2:1, 3:1, 6:1; 10:1 and 19:1 (w:w)) were prepared and stored for 4 months prior to the biogas batch assay. Results show that CC is feasible for producing biogas with reasonable CH4 yield (330 mL CH4 gVS−1) and has good storability. Using of co-ensiling blends showed advantages over CC as it elevated the hydrolysis rate (k) from 0.024 to 0.061 d−1 and decreased the lag phase (from 5 to 0.8 days) during the thermophilic (51 °C) batch test. Synergistic effects were observed from both CH4 yield and hemi-cellulose removal. The finding provided an alternative strategy for integrated straw management and CC utilization for improved biogas production.

Keywords: Agricultural residue; Anaerobic digestion; Methane; Biomass; Silage (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:142:y:2019:i:c:p:677-683

DOI: 10.1016/j.renene.2019.04.138

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