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Abstract
Lignin is a major part of the recalcitrant fraction of lignocellulose and in nature its degradation occurs through oxidative enzymes along with microbes mediated oxidative chemical actions. Oxygen assisted wet-explosion pretreatment promotes lignin solubility and leads to an increase biodegradation of lignin during anaerobic digestion processes. The pretreatment of feedlot manure was performed in a 10 L reactor at 170 C for 25 min using 4 bars oxygen and the material was fed to a continuous stirred tank reactor
operated at 55 C for anaerobic digestion. Methane yield of untreated and pretreated material was 70 ± 27 and 320 ± 36 L/kg-VS/day, respectively, or 4.5 times higher yield as a result of the pretreatment. Aliphatic acids formed during the pretreatment were utilized by microbes. 44.4% lignin in pretreated
material was actually converted in the anaerobic digestion process compared to 12.6% for untreated material indicating the oxygen assisted explosion promoted lignin degradation.
operated at 55 C for anaerobic digestion. Methane yield of untreated and pretreated material was 70 ± 27 and 320 ± 36 L/kg-VS/day, respectively, or 4.5 times higher yield as a result of the pretreatment. Aliphatic acids formed during the pretreatment were utilized by microbes. 44.4% lignin in pretreated
material was actually converted in the anaerobic digestion process compared to 12.6% for untreated material indicating the oxygen assisted explosion promoted lignin degradation.
Originalsprog | Engelsk |
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Tidsskrift | Bioresource Technology |
Vol/bind | 175 |
Sider (fra-til) | 182-188 |
Antal sider | 7 |
ISSN | 0960-8524 |
DOI | |
Status | Udgivet - 2015 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'Making lignin accessible for anaerobic digestion by wet-explosion pretreatment'. Sammen danner de et unikt fingeraftryk.Projekter
- 1 Afsluttet
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FiberMaxBiogas: Increasing the biogas yield of manure fibers by wet explosion – demo-scale
Uellendahl, H., Biswas, R., Ahring, B. K., Hilstrøm, T., Mattesen, M. R. & Munck, J.
01/06/2009 → 31/05/2012
Projekter: Projekt › Forskning