RT Conference_Proceedings
T1 Optimising butyrate and lactate yields fermenting xylose in a mixed culture system
A1 Iglesias Riobó, Juan
A1 Mauricio Iglesias, Miguel
A1 Carballa Arcos, Marta
K1 Butyrate
K1 Lactate
K1 Lignocellulosic biomass
K1 Mixed culture
K1 ph
AB Despite being the second most abundant monomer in the earth, xylose fermentation has not been studied as thoroughly as glucose fermentation. This work studies the pH effect in xylose fermentation, focusing on lactic and butyric acid production as medium chain fatty acids (MCFA) precursors. Continuous reactor operation showed that changes within a slightly acidic pH range (pH 4.5 to pH 6) affect to VFA production but not their distribution, being butyric and acetic acid the main products regardless the pH value, while lactic acid was only detected when xylose or butyric acid concentrations dropped. In contrast, xylose conversion was negatively affected by low pH values. The use of lactic acid as substrate was assessed in continuous and batch reactors, being consumed and mainly converted into butyric acid.
YR 2023
FD 2023-11-02
LK http://hdl.handle.net/10347/34747
UL http://hdl.handle.net/10347/34747
LA eng
NO 5th IWA Resource Recovery Conference, 1-3 november 2023, Shenzhen, China
NO This research was funded by Spanish Government through the CELL4CHEM project (PCI2021-121989, ERACoBioTech 3rd call). The authors belong to a Galician Competitive Research Group (ED431C-2021/37).
DS Minerva
RD 28 abr 2026