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Title (Primary) Biogas production from coumarin-rich plants—inhibition by coumarin and recovery by adaptation of the bacterial community
Author Popp, D.; Schrader, S.; Kleinsteuber, S.; Harms, H.; Sträuber, H.;
Journal FEMS Microbiology Ecology
Year 2015
Department UMB; ANA;
Volume 91
Issue 9
Language englisch;
POF III (all) R31; T15;
Supplements https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/femsec/91/9/10.1093_femsec_fiv103/4/fiv103_Supplementary_Data.zip?Expires=1586936070&Signature=WyQ0K5Osq80VZ07eRWpGSBkm0kvDM9Kr~S5vTI1oiJPIq8uaS9aqbxZ~1XgdgOMvezRtay9pCLphRtCuq5~0mYgc~xY~urUfrzePGT4kDuBON4lyBkywmw-prKtC6~lAReUAc5iO0hRyo2DSQDC~E2~cgEe2KHIAh-iykKLfPzjVJm1uyHtrQo6dIOGEUXb4jJ37iCLZ1ESxFNGCjwUlL5pp81ii0mkCtsHLiv6wtXBvE2ohJs9g-QbDq-rg9fsR2Njii6~o0ibyeLMYO-P2Xds3JVzQ40dfJLdT~mS395j2XszQF-hYI7Bltyry7ILXBVTT7-7T6Cm3S2kTnEK7BQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA
Keywords anaerobic digestion; plant secondary metabolites; t-rflp fingerprinting; continuous stirred tank reactor (cstr); energy crops; mcra gene
UFZ wide themes RU4;
Abstract Plants like sweet clover (Melilotus spp.) are not suitable as fodder for cattle because of harmful effects of the plant secondary metabolite coumarin. As an alternative usage, the applicability of coumarin-rich plants as substrates for biogas production was investigated. When coumarin was added to continuous fermentation processes codigesting grass silage and cow manure, it caused a strong inhibition noticeable as decrease of biogas production by 19% and increase of metabolite concentrations to an organic acids/alkalinity ratio higher than 0.3 gorganic acids gCaCO3−1. Microbial communities of methanogenic archaea were dominated by the genera Methanosarcina (77%) and Methanoculleus (11%). This community composition was not influenced by coumarin addition. The bacterial community analysis unraveled a divergence caused by coumarin addition correlating with the anaerobic degradation of coumarin and the recovery of the biogas process. As a consequence, biogas production resumed similar to the coumarin-free control with a biogas yield of 0.34 LN gvolatile solids−1 and at initial metabolite concentrations (∼ 0.2 gorganic acids gCaCO3−1). Coumarin acts as inhibitor and as substrate during anaerobic digestion. Hence, coumarin-rich plants might be suitable for biogas production, but should only be used after adaptation of the microbial community to coumarin.
ID 16770
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16770
Popp, D., Schrader, S., Kleinsteuber, S., Harms, H., Sträuber, H. (2015):
Biogas production from coumarin-rich plants—inhibition by coumarin and recovery by adaptation of the bacterial community
FEMS Microbiol. Ecol. 91 (9), fiv103