Effects of CO2 enrichment on the anaerobic digestion of sewage sludge in continuously operated fermenters
The effect of CO2 enrichment in sewage sludge anaerobic digestion (AD) as a potential strategy to improve the biogas yield was assessed at increasing organic loading rates (OLR). Effects on process performance and resilience were evaluated in long-term continuous AD experiments at lab-scale. The spe...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 April 2021
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| In: |
Bioresource technology
Year: 2021, Jahrgang: 332, Pages: 1-10 |
| ISSN: | 1873-2976 |
| DOI: | 10.1016/j.biortech.2021.125147 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.biortech.2021.125147 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0960852421004867 
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| Verfasserangaben: | Meriam Muntau, Michael Lebuhn, Daniela Polag, Yadira Bajón-Fernández, Konrad Koch |
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| 520 | |a The effect of CO2 enrichment in sewage sludge anaerobic digestion (AD) as a potential strategy to improve the biogas yield was assessed at increasing organic loading rates (OLR). Effects on process performance and resilience were evaluated in long-term continuous AD experiments at lab-scale. The specific methane production (SMP) was sustainably enhanced in the test digester compared to a control at elevated OLRs, reaching an increase of 6 ± 12% on average at the highest OLR tested (4.0 kgVS/(m3·d)). The reduction of CO2 via homoacetogenesis, facilitating acetoclastic CH4 formation is proposed as the dominant conversion pathway. Results suggest that sufficient load of easily degradable substances is a prerequisite for intrinsic formation of the reduction equivalent H2 via acidogenesis. The enhanced resilience of the process under CO2-enriched conditions in response to acid accumulation further qualifies this approach as a viable option for improving AD performance by converting a waste stream into a valuable product. | ||
| 650 | 4 | |a Anaerobic digestion | |
| 650 | 4 | |a CO enrichment | |
| 650 | 4 | |a Process stability | |
| 650 | 4 | |a Sewage sludge treatment | |
| 650 | 4 | |a Specific methane production | |
| 700 | 1 | |a Lebuhn, Michael |e VerfasserIn |4 aut | |
| 700 | 1 | |a Polag, Daniela |e VerfasserIn |0 (DE-588)138286205 |0 (DE-627)601101391 |0 (DE-576)307056171 |4 aut | |
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| 700 | 1 | |a Koch, Konrad |e VerfasserIn |4 aut | |
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