AI Article Synopsis
- A mutant strain of Halomonas bluephagenesis (TDH4A1B5P) was identified to produce polyhydroxyalkanoates (PHA) under low-salt, non-sterile conditions, albeit with low yield initially.
- To enhance PHA production, different nitrogen sources were tested, revealing urea as most effective during stable growth and ammonium sulfate during logarithmic growth, with sulfate ions significantly extending growth time and PHA content.
- Through an optimized feeding strategy using nitrogen sources and sulfate ions, the culture achieved a dry cell weight of 124 g/L and PHA content of 82.3%, resulting in a PHA yield of 101 g/L in a bioreactor
Article Abstract
The mutant strain Halomonas bluephagenesis (TDH4A1B5P) was found to produce PHA under low-salt, non-sterile conditions, but the yield was low. To improve the yield, different nitrogen sources were tested. It was discovered that urea was the most effective nitrogen source for promoting growth during the stable stage, while ammonium sulfate was used during the logarithmic stage. The growth time of H. bluephagenesis (TDH4A1B5P) and its PHA content were significantly prolonged by the presence of sulfate ions. After 64 hr in a 5-L bioreactor supplemented with sulfate ions, the dry cell weight (DCW) of H. bluephagenesis weighed 132 g/L and had a PHA content of 82%. To promote the growth and PHA accumulation of H. bluephagenesis (TDH4A1B5P), a feeding regimen supplemented with nitrogen sources and sulfate ions with ammonium sodium sulfate was established in this study. The DCW was 124 g/L, and the PHA content accounted for 82.3% (w/w) of the DCW, resulting in a PHA yield of 101 g/L in a 30-L bioreactor using the optimized culture strategy. In conclusion, stimulating H. bluephagenesis (TDH4A1B5P) to produce PHA is a feasible and suitable strategy for all H. bluephagenesis.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11074995 | PMC |
| http://dx.doi.org/10.1093/jimb/kuae013 | DOI Listing |
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