RT Journal Article
T1 Optimizing volatile fatty acids production from fsh canning wastewater: the role of feeding strategies and retention time
A1 Casero-Díaz, Tamara
A1 Castro‑Barros, Celia
A1 Carballa Arcos, Marta
A1 Mauricio Iglesias, Miguel
A1 Duarte, Maria Salomé Lira
K1 Anaerobic fermentation
K1 Carboxylate platform
K1 Industrial wastewater
K1 Resource recovery
AB The transition to a circular economy requires innovative strategies for wastewater valorization, particularly in water-intensive sectors, such as fsh canning. Anaerobic fermentation of fsh canning wastewater to produce volatile fatty acids (VFAs) is a promising alternative to reach this goal. This study evaluated the impact of two bioreactor feeding strategies (continuous (UASB) and sequential batch (SBR)) and two hydraulic retention times (HRT) (6 and 3 days) on VFA yield and product spectrum. The results showed that both feeding modes resulted in high VFA production, exceeding 30 g VFA-COD/L. It can be concluded that the feeding mode has no impact on VFA yield. However, it does exert a signifcant infuence on the product spectrum. Sequential feeding was found to favor butyric acid production, with a 15% higher yield compared to continuous feeding. In contrast, continuous feeding promoted the formation of propionic and valeric acids, with yields 5% and 4% higher, respectively, than those observed under sequential feeding. In contrast, variations in HRT demonstrated no signifcant impact on either yield or product spectrum. These fndings suggest that, for the scaling up of this valorization, the selection of feeding mode should be tailored to the desired objective. Furthermore, a lower HRT (3 days) may lead to financial savings and enhanced productivity without any detrimental impact on yield or product spectrum.
PB Springer
SN 2190-6815
YR 2025
FD 2025-04-08
LK https://hdl.handle.net/10347/42443
UL https://hdl.handle.net/10347/42443
LA eng
NO Casero-Díaz, T., Castro-Barros, C., Carballa, M. et al. Optimizing volatile fatty acids production from fish canning wastewater: the role of feeding strategies and retention time. Biomass Conv. Bioref. (2025). https://doi.org/10.1007/s13399-025-06841-w
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This research was funded by Unidad Mixta CIGAT CIRCULAR (IN853 C2022/03) from Axencia Galega de Innovación (GAIN) (Xunta de Galicia). Special thanks to IACOBUS stay program (GNP-AECT) for their support through the grant (104). The authors also thank the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit. MSD acknowledges FCT for the Junior Research contract obtained under the scope of the Scientifc Stimulus Employment 2022 (ref: 2022.06569.CEECIND/CP1718/CT0004; doi:https://doi.org/https://doi.org/10.54499/2022.06569.CEECIND/ CP1718/CT0004). MMI and MC belong to a Galician Competitive Research Group (ED431 C- 2021/37).
DS Minerva
RD 22 abr 2026