| Records |
| Author |
Palmeiro-Sanchez, T.; Fra-Vazquez, A.; Rey-Martinez, N.; Campos, J.L.; Mosquera-Corral, A. |
| Title |
Transient concentrations of NaCl affect the PHA accumulation in mixed microbial culture |
Type |
|
| Year |
2016 |
Publication |
Journal Of Hazardous Materials |
Abbreviated Journal |
J. Hazard. Mater. |
| Volume |
306 |
Issue |
|
Pages |
332-339 |
| Keywords |
Inhibition; Microbial mixed culture; Polyhydroxyalkanoates; Sodium chloride; Volatile fatty acids |
| Abstract |
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 0.8 g Na+/L, as NaOH. This MMC presented a maximum PHA accumulation capacity of 53 wt% with 27 Cmol% HV. Accumulation experiments performed with added NaCI at concentrations of 7, 13 and 20 g/L shown that this salt provoked a decrease of the biomass PHA production rate, with an IC50 value close to 7 g NaCl/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 6.37 Cmol/Cmol, which means a HV decrease between 27 and 14 Cmol%. 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. (C) 2015 Elsevier B.V. All rights reserved. |
| Address |
[Palmeiro-Sanchez, T.; Fra-Vazquez, A.; Rey-Martinez, N.; Mosquera-Corral, A.] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, Rua Lope Gomez de Marzoa S-N, E-15705 Santiago De Compostela, Spain, Email: tania.palmeiro@usc.es |
| Corporate Author |
|
Thesis |
|
| Publisher |
Elsevier Science Bv |
Place of Publication |
|
Editor |
|
| Language |
English |
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
ISSN  |
0304-3894 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:000374803400036 |
Approved |
|
| Call Number |
UAI @ eduardo.moreno @ |
Serial |
616 |
| Permanent link to this record |
| |
|
| |
| Author |
Palmeiro-Sanchez, T.; Campos, J.L.; Mosquera-Corral, A. |
| Title |
Bioconversion of Organic Pollutants in Fish-Canning Wastewater into Volatile Fatty Acids and Polyhydroxyalkanoate |
Type |
|
| Year |
2021 |
Publication |
International Journal of Environmental Research and Public Health |
Abbreviated Journal |
Int. J. Environ. Res. Public Health |
| Volume |
18 |
Issue |
19 |
Pages |
10176 |
| Keywords |
acidogenic fermentation; fish-canning wastewater; mixed culture; polyhydroxyalkanoates (PHAs); saline conditions; volatile fatty acids (VFAs) |
| Abstract |
The wastewater from the cookers of a tuna-canning plant was used as feedstock for the process. It was acidified in a continuous stirred tank reactor (CSTR) of 1.5 L to produce a mixture of volatile fatty acids (VFAs). The effluent contained 28.3 & PLUSMN; 8.7 g CODS/L and 25.0 & PLUSMN; 4.6 g CODVFA/L, 4.4 & PLUSMN; 1.6 g NH4+/L, and 10.9 & PLUSMN; 4.0 g Na+/L, which corresponds to about 28 g NaCl/L approximately. This was used to feed a PHA production system. The enriched MMC presented a capacity to accumulate PHAs from the fermented tuna wastewater. The maximum PHA content of the biomass in the fed-batch (8.35 wt% PHA) seemed very low, possibly due to the variable salinity (from 2.2 up to 12.3 g NaCl/L) and the presence of ammonium (which promoted the biomass growth). The batch assay showed a PHA accumulation of 5.70 wt% PHA, but this is a much better result if the productivity of the reactor is taken into account. The fed-batch reactor had a productivity of 10.3 mg PHA/(L h), while the batch value was about five times higher (55.4 mg PHA/(L h)). At the sight of the results, it can be seen that the acidification of fish-canning wastewater is possible even at high saline concentrations (27.7 g NaCl/L). On the other hand, the enrichment and accumulation results show us promising news and which direction has to be followed: PHAs can be obtained from challenging substrates, and the feeding mode during the accumulation stage has an important role to play when it comes to inhibition. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1660-4601 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:000709111100001 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1479 |
| Permanent link to this record |
