RT Conference_Proceedings
T1 Evaluation of protein composition influence on yields and selectivity of volatile fatty acids production
A1 Bevilacqua, Riccardo
A1 Regueira López, Alberte
A1 Mauricio Iglesias, Miguel
A1 Lema Rodicio, Juan Manuel
A1 Carballa Arcos, Marta
K1 Mixed culture fermentation
K1 Substrate influence
K1 VFA production
AB The influence of protein composition on volatile fatty acids (VFA) production is notclear and need to be further studied to valorise protein residual streams. For this purpose, twocontinuous stirred tank reactors were inoculated with acidogenic biomass and fed with two proteins(casein and gelatin) having different amino acids compositions. Casein showed a higheracidification degree and double the VFA productivity of gelatin, despite its imbalance betweenelectron acceptor amino acids and donors. Experimental VFA spectra highlighted n-butyric acid asa major product for casein and propionic acid for gelatin. Finally, we hypothesised preferentialconsumption for some amino acids (AA), with the experimental results confirming it. For thisreason, previous models based on fixed Stickland stoichiometry could be inaccurate at describingproteins degradation. This knowledge helps to better predict the outcome of the process whenfermenting protein rich substrates
YR 2019
FD 2019
LK http://hdl.handle.net/10347/23091
UL http://hdl.handle.net/10347/23091
LA eng
NO 16th IWA World Conference on Anaerobic Digestion Conference. 23-27 June 2019, Delft,The Netherlands
DS Minerva
RD 24 abr 2026