Polyhydroxyalkanoates Production by Mixed Microbial Culture under High Salinity

The fishing industry produces vast amounts of saline organic side streams that require adequate treatment and disposal. bioconversion resources into value-added products, such as biodegradable polyhydroxyalkanoates (PHAs), has not yet been fully explored. This study investigated PHA production by mixed microbial cultures under 30 gNaCl/L, the highest NaCl concentration reported for acclimatization a PHA-accumulating culture (MMC). operational conditions used during culture-selection stage resulted in an enriched dominated Rhodobacteraceae family (95.2%) capable storing PHAs up to 84.1% wt. (volatile suspended solids (VSS) basis) loading rate (OLR) applied (120 Cmmol/(L.d)). presented higher preference consumption valeric acid (0.23 ± 0.03 CmolHVal/(CmolX.h)), 3HV monomer polymerization (0.33 0.04 CmmolHV/(CmmolX.h) was well. As result, P(3HB-co-3HV)) with high HV content (63% wt.) produced accumulation tests conducted at OLRs gNaCl/L. A global volumetric productivity 0.77 gPHA/(L.h) specific 0.21 gPHA/(gX.h) were achieved. These results suggested significant potential PHAs.