RT Journal Article
T1 Recovery of polyhydroxyalkanoates from cooked mussel processing wastewater at high salinity and acidic conditions
A1 Pedrouso Fuentes, Alba
A1 Fra Vázquez, Andrea
A1 Val del Río, Ángeles
A1 Mosquera Corral, Anuska
K1 Fish-canning industry
K1 Industrial wastewater valorization
K1 Low PH
K1 Mixed microbial culture
K1 PHA
AB Polyhydroxyalkanoates (PHA) are biodegradable polymers that can be intracellularly produced by microorganisms valorizing organic-rich wastes. In the present study, a PHA production system was fed with mussel cooker wastewater after acidogenic fermentation. Besides low pH (4.0 ± 0.3) and high salt (21.7 ± 2.9 g NaCl/L) concentrations, this wastewater also contained nitrogen concentrations (0.8 ± 0.1 g N/L), which were previously reported to be a challenge to the PHA accumulating bacteria enrichment. Bacteria with a PHA storage capacity were selected in an enrichment sequencing batch reactor (SBR) after 60 days of operation. The enriched mixed microbial culture (MMC) was mainly formed by microorganisms from phylum Bacteroidetes, and genera Azoarcus, Comamonas and Thauera from phylum Proteobacteria. The MMC was able to accumulate up to 25 wt% of PHA that was mainly limited by the wastewater nitrogen content, which promoted biomass growth instead of PHA accumulation. Indeed, when the presence of nutrient was limited, PHA stored in the accumulation reactor increased to up to 40.9 wt%. This work demonstrated the feasibility of the enrichment of a MMC with a PHA storage ability valorizing the fish-canning industrial wastewater at low pH, which is generally difficult to treat in wastewater treatment plants
PB MDPI
YR 2020
FD 2020
LK http://hdl.handle.net/10347/27660
UL http://hdl.handle.net/10347/27660
LA eng
NO Sustainability  12 (2020) 10386. https://doi.org/10.3390/su122410386
NO This research was funded by the Spanish Government (AEI) through the FISHPOL (CTQ2014-55021-R) and TREASURE (CTQ2017-83225-C2-1-R) projects. The authors belong to the Galician Competitive Research Group GRC ED431C 2017/29 and to the CRETUS Strategic Partnership (ED431E 2018/01). All these programs are co-funded by the FEDER (EU)
DS Minerva
RD 24 abr 2026