Transient concentrations of NaCl affect the PHA accumulation in mixed microbial culture

T. Palmeiro-Sánchez, A. Fra-Vázquez, N. Rey-Martínez, J. L. Campos, A. Mosquera-Corral

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

28 Citas (Scopus)


The present study explores the feasibility of the accumulation of polyhydroxyalkanoates (PHAs) under the presence of transient concentrations of added sodium chloride, by means of a mixed microbial culture (MMC). This culture was enriched on a mixture of volatile fatty acids (VFAs) containing 0.8g Na+/L as NaOH. This MMC presented a maximum PHA accumulation capacity of 53wt% with 27Cmol% HV. Accumulation experiments performed with added NaCl at concentrations of 7, 13 and 20g/L shown that this salt provoked a decrease of the biomass PHA production rate, with an IC50 value close to 7gNaCl/L. The accumulated PHA was lower than the corresponding value of the assay without the addition of salt. Furthermore, the composition of the biopolymer, in terms of HB:HV ratio, changed from 2.71 to 6.37Cmol/Cmol, which means a HV decrease between 27 and 14Cmol%. Summarizing, the PHA accumulation by a MMC non-adapted to saline conditions affected the polymer composition and lead to lower production yields and rates than in absence of added NaCl.

Idioma originalInglés
Páginas (desde-hasta)332-339
Número de páginas8
PublicaciónJournal of Hazardous Materials
EstadoPublicada - 5 abr. 2016
Publicado de forma externa


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