RT info:eu-repo/semantics/article
T1 Enrichment of a mixed syngas-converting culture for volatile fatty acids and methane production
A1 García Casado, Silvia María
A1 Muñoz Torre, Raúl
A1 Lebrero Fernández, Raquel
K1 Carbon monoxide
K1 Carboxylic acids
K1 Kinetics
K1 Open-mixed cultures
K1 Synthesis gas
AB The present study evaluated the production potential of CH4, carboxylic acids and alcohols from a mixed culture enriched using synthetic syngas. The influence of syngas concentration on the microbial community and products productivity and selectivity was investigated. The results demonstrated the enrichment of a mesophilic mixed culture capable of converting CO and H2 mainly to CH4 and acetate, along with butyrate. The selectivity values showed that acetate production was enhanced during the first cycle in all conditions tested (up to 20 %), while CH4 was the main product generated during following cycles. Concretely, CH4 selectivity remained unaffected by syngas concentration, reaching a stable value of 41.6 ± 2.0 %. On the other hand, butyrate selectivity was only representative at the highest syngas concentration and lower pH values (26.1 ± 5.8 %), where the H2 consumption was completely inhibited. Thus, pH was identified as a key parameter for both butyrate synthesis and the development of hydrogenotrophic activity.
PB Elsevier
SN 0960-8524
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/72948
UL https://uvadoc.uva.es/handle/10324/72948
LA eng
NO Bioresource Technology, 2024, vol. 400, 130646
NO Producción Científica
DS UVaDOC
RD 23-dic-2024