RT info:eu-repo/semantics/article
T1 Valorization of aromatic hydrocarbons into polyhydroxyalkanoates: advances towards sustainable waste gas treatment
A1 Díaz Moreno, Nicolás
A1 Lobos, Cecilia
A1 Carvajal, Andrea
A1 Poblete, Ignacio
A1 Cantera Ruiz De Pellon, Sara
A1 Lebrero Fernández, Raquel
K1 Bioconversion
K1 BTEXS
K1 Ethylbenzene
K1 Metagenomics
K1 PHBV
K1 Toluene
K1 Volatile organic compounds
AB Benzene, toluene, ethylbenzene, xylene and styrene (BTEXS) are priority gaseous pollutants due to their wide-spread release and health risks. This study demonstrates an efficient BTEXS bioconversion process into poly-hydroxyalkanoates (PHA) using a specialized mixed microbial culture dominated by Pseudonocardia andRhodococcus. The consortium achieved simultaneous degradation rates of 15.1 ± 3.9 g m 3h 1 for toluene and17.6 ± 5.7 g m 3h 1 for ethylbenzene, with removal efficiencies over 90 %. The operating strategy promotedPHA accumulation up to 21.4 % gPHA gDCW 1 . A two-step process was successfully implemented consisting of aninitial reactor for biomass growth followed by a second reactor under nitrogen deprivation. PHA analysisrevealed the synthesis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer with a dynamic increase in 3-hydroxyvalerate content under prolonged nitrogen starvation. Metagenomics provided insights into the micro-bial networks and metabolic pathways involved in the process. This research offers a sustainable solution formitigating BTEXS pollution while producing valuable bioplastics.
PB Elsevier
SN 0960-8524
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/78516
UL https://uvadoc.uva.es/handle/10324/78516
LA eng
NO Bioresource Technology, 2025, vol. 436, p. 132991
NO Producción Científica
DS UVaDOC
RD 10-oct-2025