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- W2904295170 abstract "Abstract The 8,000 biogas plants currently in operation in Germany are mainly fed with biomass from annual crops. However, feedstock from perennial crops such as miscanthus is expected to be more environmentally benign. If miscanthus is to be used in greater amounts as a substrate for anaerobic digestion, storage will become a relevant topic, as a continuous supply of biomass throughout the year is necessary. The objective of this study was to identify the miscanthus harvest time that best balances the simultaneous achievement of high silage quality, high digestibility and high methane hectare yields. For this purpose, biomass from four miscanthus genotypes with varying senescence characteristics was harvested on three different dates in autumn 2017. Part of the biomass was ensiled, and the methane yield of both ensiled and non‐ensiled biomass was analysed in a biogas batch test to assess the effect of ensiling on the methane hectare yield and digestion velocity. The ensiled biomass was found to have an up to 7% higher substrate‐specific methane yield and also showed a higher digestion velocity than the non‐ensiled biomass. The silage quality was best when miscanthus was harvested in mid‐October, due to highest lactic acid content (average: 3.0% of DM) and lowest pH (average: 4.39) compared to the harvests in mid‐September and beginning of October. Mass losses during ensiling (as high as 7.6% of fresh matter for the M. sinensis genotype Sin55 ) were compensated for by a higher substrate‐specific methane yield (up to 353 Nml CH 4 (g oDM) −1 ) in ensiled miscanthus. This resulted in non‐significantly different methane hectare yields for non‐ensiled (average: 4.635 Nm 3 CH 4 /ha) and ensiled miscanthus biomass (4.803 Nm 3 CH 4 /ha). A comparison of the four genotypes suggests that Miscanthus x giganteus is the most suitable genotype for ensiling as it had the best silage quality." @default.
- W2904295170 created "2018-12-22" @default.
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- W2904295170 date "2019-01-01" @default.
- W2904295170 modified "2023-09-30" @default.
- W2904295170 title "Miscanthus for biogas production: Influence of harvest date and ensiling on digestibility and methane hectare yield" @default.
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- W2904295170 doi "https://doi.org/10.1111/gcbb.12584" @default.
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