Journal article
Making lignin accessible for anaerobic digestion by wet-explosion pretreatment
Bioresource technology, Vol.175, pp.182-188
01/2015
Handle:
https://hdl.handle.net/2376/104475
PMID: 25459820
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 10L reactor at 170°C for 25min using 4bars 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±36L/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.
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Details
- Title
- Making lignin accessible for anaerobic digestion by wet-explosion pretreatment
- Creators
- Birgitte K Ahring - Bioproducts, Sciences & Engineering Laboratory (BSEL), Washington State University, USA. Electronic address: bka@wsu.eduRajib Biswas - Bioproducts, Sciences & Engineering Laboratory (BSEL), Washington State University, USAAftab Ahamed - Bioproducts, Sciences & Engineering Laboratory (BSEL), Washington State University, USAPhilip J Teller - Bioproducts, Sciences & Engineering Laboratory (BSEL), Washington State University, USAHinrich Uellendahl - Section for Sustainable Biotechnology, Aalborg University Copenhagen, Denmark
- Publication Details
- Bioresource technology, Vol.175, pp.182-188
- Academic Unit
- Biological Systems Engineering, Department of; Chemical Engineering and Bioengineering, School of
- Publisher
- England
- Identifiers
- 99900547083901842
- Language
- English
- Resource Type
- Journal article