Coupled Biogas and Fiber Production from Agricultural Residues and Energy Crops with Steam Explosion Treatment
Abstract
:1. Introduction
2. Materials and Methods
2.1. Substrates and Sampling
2.2. Steam Explosion (SE)
2.3. Solid–Liquid Separation
2.4. Biogas Potential Determination
2.5. Analytic Parameters Determined for Solid and Liquid Fractions
2.6. Characterization of Solid-Phase Specific Properties
3. Results and Discussion
3.1. Mass Balance
3.2. Energy Balance
3.3. Characterization of Solid Fraction
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Sample | Substrate: Water Ratio Substrate: Fresh Water | Water Content % |
---|---|---|
Sylvatic silpiha silage | 3:2 | 85.8 |
Nettle silage | 2:1 | 79.7 |
Hop grubbing chaff | 3:2 | 84.9 |
Miscanthus whole plant | 3:2 | 74.5 |
Miscanthus straw | 1:2 | 75.1 |
Apple pomace | 3:1 | 85.3 |
Alfalfa stalks | 2:1 | 65.8 |
Flax shives | 1:2 | 71.1 |
Substrate | Phase | Distribution of ODM after Phase Separation | DM | ODM |
---|---|---|---|---|
% | % | %DM | ||
Sylvatic silphia silage | Substrate | 23.7 ± 0.1 | 88.4 ± 0.1 | |
Solid | 86.2 | 47.1 ± 0.9 | 92.4 ±0.0 | |
Liquid | 13.8 | 6.0 ± 0.1 | 58.9 ± 0.1 | |
Settle silage | Substrate | 30.5 ± 0.2 | 79.2 ± 0.0 | |
Solid | 86.9 | 46.6 ± 1.2 | 90.3 ±0.4 | |
Liquid | 13.1 | 7.4 ± 0.5 | 74.2 ± 0.5 | |
Hop grubbing chaff | Substrate | 25.2 ± 1.1 | 80.1 ± 5.5 | |
Solid | 82.7 | 48.0 ± 2.6 | 89.8 ± 1.3 | |
Liquid | 17.3 | 10.1 ± 0.5 | 81.8 ± 0.2 | |
Miscanthus whole plant | Substrate | 42.6 ± 0.1 | 96.3 ± 0.1 | |
Solid | 93.9 | 42.6 ± 1.6 | 96.1 ± 0.2 | |
Liquid | 6.1 | 4.5 ± 0.3 | 77.6 ± 1.3 | |
Miscanthus straw | Substrate | 74.6 ± 0.4 | 96.1 ± 0.1 | |
Solid | 97.3 | 47.6 ± 0.0 | 97.1 ± 0.1 | |
Liquid | 2.7 | 3.5 ± 0.0 | 77.7 ± 0.5 | |
Apple pomace | Substrate | 19.6 ± 0.1 | 97.8 ± 0.0 | |
Solid | 92.1 | 37.1 ± 0.4 | 99.1 ± 0.1 | |
Liquid | 7.9 | 7.7 ± 0.0 | 87.9 ± 1.1 | |
aAfalfa stalk | Substrate | 51.3 ± 0.8 | 92.5 ± 0.7 | |
Solid | 88.8 | 49.8 ± 1.0 | 95.0 ± 0.2 | |
Liquid | 11.2 | 11.0 ± 0.1 | 76.8 ± 0.4 | |
Flax shives | Substrate | 86.8 ± 0.7 | 84.5 ± 1.9 | |
Solid | 95.3 | 50.0 ± 2.8 | 96.7 ± 0.9 | |
Liquid | 4.7 | 5.4 ± 0.0 | 90.0 ± 0.4 |
Substrate | Phase | SMY | Methane Yield | Proportion of Methane Yield |
---|---|---|---|---|
LCH4 kgODM−1 | LCH4 kgFM−1 | % | ||
Sylvatic silphia silage | Solid | 208 ± 6 | 91 ± 3 | 78.6 |
Liquid | 340 ± 10 | 12 ± 0 | 21.4 | |
Nettle silage | Solid | 217 ± 20 | 91 ± 8 | 79.7 |
Liquid | 334 ± 70 | 18 ± 4 | 20.3 | |
Hop grubbing chaff | Solid | 179 ± 24 | 77 ± 10 | 73.8 |
Liquid | 336 ± 2 | 28 ± 0 | 26.2 | |
Miscanthus whole plant | Solid | 280 ± 25 | 115 ± 10 | 90.0 |
Liquid | 391 ± 64 | 14 ± 2 | 10.0 | |
Miscanthus straw | Solid | 192 ± 10 | 89 ± 5 | 95.5 |
Liquid | 354 ± 4 | 10 ± 0 | 4.5 | |
Apple pomace | Solid | 287 ± 17 | 106 ± 6 | 87.3 |
Liquid | 486 ± 53 | 33 ± 4 | 12.7 | |
Alfalfa stalk | Solid | 184 ± 3 | 85 ± 1 | 82.3 |
Liquid | 344 ± 23 | 28 ± 2 | 17.7 | |
Flax shives | Solid | 100 ± 8 | 48 ± 4 | 92.3 |
Liquid | 297 ± 5 | 14 ± 0 | 7.7 |
Substrate | Phase | pH | SUM-VFA | Acetic Acid | Butyric Acid |
---|---|---|---|---|---|
g kgFM−1 | g kgFM−1 | g kgFM−1 | |||
Sylvatic silphia silage | solid | 5.7 | 10.6 | 5.4 | 0.2 |
liquid | 5.3 | 25.0 | 13.9 | 0.5 | |
Nettle silage | solid | 5.2 | 7.7 | 5.7 | 2.1 |
liquid | 5.0 | 16.0 | 12.2 | 4.1 | |
Hop grubbing chaff | solid | 5.2 | 16.4 | 8.6 | 3.0 |
liquid | 5.2 | 29.9 | 17.4 | 5.0 | |
Miscanthus whole plant | solid | 4.8 | 1.1 | 1.0 | 0.1 |
liquid | 4.3 | 4.8 | 4.8 | 0.1 | |
Miscanthus straw | solid | 6.0 | 0.4 | 0.4 | 0.0 |
liquid | 5.2 | 3.2 | 3.1 | 0.1 | |
Apple pomace | solid | 3.7 | 1.2 | 1.1 | 0.2 |
liquid | 3.5 | 1.8 | 1.6 | 0.2 | |
Alfalfa stalk | solid | 6.0 | 1.6 | 1.3 | 0.3 |
liquid | 5.0 | 6.2 | 5.8 | 0.4 | |
Flax shives | solid | 4.3 | 3.1 | 2.9 | 0.2 |
liquid | 4.2 | 7.7 | 7.4 | 0.4 |
Substrate | Water Absorption Capacity | Average Particle Size |
---|---|---|
%FM | µm | |
Sylvatic silphia silage | 340 | 1575 |
Nettle silage | 440 | 1857 |
Hop grubbing chaff | 409 | 1540 |
Miscanthus whole plant | 401 | 748 |
Miscanthus straw | 417 | 756 |
Apple pomace | 216 | 388 |
Alfalfa stalk | 318 | 1207 |
Flax shives | 504 | 520 |
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Hülsemann, B.; Baumgart, M.; Lenz, L.; Elviliana; Föllmer, M.; Sailer, G.; Dinkler, K.; Oechsner, H. Coupled Biogas and Fiber Production from Agricultural Residues and Energy Crops with Steam Explosion Treatment. Appl. Biosci. 2023, 2, 278-291. https://doi.org/10.3390/applbiosci2020019
Hülsemann B, Baumgart M, Lenz L, Elviliana, Föllmer M, Sailer G, Dinkler K, Oechsner H. Coupled Biogas and Fiber Production from Agricultural Residues and Energy Crops with Steam Explosion Treatment. Applied Biosciences. 2023; 2(2):278-291. https://doi.org/10.3390/applbiosci2020019
Chicago/Turabian StyleHülsemann, Benedikt, Marian Baumgart, Leonhard Lenz, Elviliana, Marie Föllmer, Gregor Sailer, Konstantin Dinkler, and Hans Oechsner. 2023. "Coupled Biogas and Fiber Production from Agricultural Residues and Energy Crops with Steam Explosion Treatment" Applied Biosciences 2, no. 2: 278-291. https://doi.org/10.3390/applbiosci2020019