Absence of microbial mineralization of lignin in anaerobic enrichment cultures
The existence of anaerobic biodegradation of lignin was examined in mixed microflora. Egyptian soil samples, in which rapid mineralization of organic matter takes place in the presence of an important anaerobic microflora, were used to obtain the anaerobic enrichment cultures for this study. Specifically, /sup 14/CO/sub 2/ or (/sup 14/C) lignin wood was used to investigate the release of labeled gaseous or soluble degradation products of lignin in microbial cultures. No conversion of /sup 14/C-labeled lignin to /sup 14/CO/sub 2/ or /sup 14/CH/sub 4/ was observed after 6 months of incubation at 30 degrees C in anaerobic conditions with or without NO/sub 3//sup -/. A small increase in soluble radioactivity was observed in certain cultures, but it could not be related to the release of catabolic products during the anaerobic biodegradation of lignin. 36 references.
- Research Organization:
- Institut National Agronomique Paris - Grignon, France
- OSTI ID:
- 6925142
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 46:3; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ANAEROBIC CONDITIONS
ANAEROBIC DIGESTION
BENCH-SCALE EXPERIMENTS
BIOCONVERSION
BIODEGRADATION
CARBOHYDRATES
CARBON 14 COMPOUNDS
CHEMICAL REACTIONS
DECOMPOSITION
DIGESTION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LIGNIN
MANAGEMENT
MICROORGANISMS
ORGANIC COMPOUNDS
POLYSACCHARIDES
PROCESSING
SACCHARIDES
TRACER TECHNIQUES
WASTE MANAGEMENT
WASTE PROCESSING