Inhibitory effect of hardwood lignin on acetate-utilizing methanogens in anaerobic digester sludge

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Hardwood lignin (lignosulfonate) at 1.3, 2.6, and 3.9% (w/w) inhibited the acetate-utilizing methanogens of anaerobic digester sludge by 14.5, 18 and 21 days (in non-inhibitory conditions it took 10 days) to produce the same amount of methane. Methanogenesis under thermophilic (50 degrees C) conditions was completely inhibited by 2.6% hardwood lignin for 8 days regardless of the substrate (acetic acid) concentration. After that, at higher acetic acid concentration, more methane was produced. Increasing in the sludge concentration decreased the inhibitory effect of the lignin.
Publisher
Springer Netherlands
Issue Date
2000-01
Language
English
Article Type
Article
Keywords

MODEL COMPOUNDS; DEGRADATION; BIODEGRADATION; BACTERIA; TOXICITY

Citation

BIOTECHNOLOGY LETTERS, v.22, no.19, pp.1531 - 1535

ISSN
0141-5492
URI
http://hdl.handle.net/10203/70076
Appears in Collection
BS-Journal Papers(저널논문)
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