RT Journal Article
T1 Understanding the effect of trace elements supplementation on volatile fatty acids production from proteins
A1 Bevilacqua, Riccardo
A1 Regueira López, Alberte
A1 Mauricio Iglesias, Miguel
A1 Lema Rodicio, Juan Manuel
A1 Carballa Arcos, Marta
K1 Amino acid degradation
K1 Biorefinery
K1 Carboxylate platform
K1 Micronutrients
K1 Mixed-culture fermentation
AB This investigation studies the impact of trace elements supplementation on protein anaerobic conversion into volatile fatty acids (VFAs). Two continuous reactors were operated with two model substrates, casein and gelatin, at acid (pH 5) and neutral (pH 7) conditions, with the addition of macro and micronutrients. Micronutrients increased the acidification degree of both proteins from 40% to 50% to more than 60% only at pH 7, which was consistent with a greater amino acid consumption at neutral conditions. Furthermore, trace elements modified the process selectivity, promoting valeric acids production and other variations dependant on protein composition. Isomerisation and chain elongation processes were identified as a consequence of the observed deviations between amino acid consumption and VFA production. Overall, this study demonstrated that the supplementation of micronutrients can be useful to enhance and steer the anaerobic fermentation of protein-rich streams
PB Elsevier
YR 2021
FD 2021
LK http://hdl.handle.net/10347/27647
UL http://hdl.handle.net/10347/27647
LA eng
NO Journal of Environmental Chemical Engineering 9 (2021) 105934. https://doi.org/10.1016/j.jece.2021.105934
NO This project has received funding from the Spanish Government through the European Union’s ERA-IB programme under grant agreement number PCIN-2016-102 and from the Spanish Ministry of Education (FPU14/05457). The authors belong to a Galician Competitive Research Group (ED431C2017/029; ED431E 2018/01), co-funded by Xunta de Galicia (Spain) and the European Regional Development Fund (ERDF-EU)
DS Minerva
RD 28 abr 2026