| Title | Screening of alternative nitrogen sources for sophorolipid production through submerged fermentation using Starmerella bombicola |
|---|---|
| ID_Doc | 23604 |
| Authors | Eras-Muñoz, E; Wongsirichot, P; Ingham, B; Winterburn, J; Gea, T; Font, X |
| Title | Screening of alternative nitrogen sources for sophorolipid production through submerged fermentation using Starmerella bombicola |
| Year | 2024 |
| Published | |
| Abstract | To explore a sustainable sophorolipid production, several hydrolysates from agricultural byproducts, such as wheat feed, rapeseed meal, coconut waste and palm waste were used as nitrogen sources. The four hydrolysates overperformed the controls after 168 h of fermentation using Starmerella bombicola ATCC 22214. Wheat feed and coconut waste hydrolysates were the most promising feedstocks presenting a linear relationship between yeast growth and diacetylated lactonic C18:1 production at total nitrogen concentrations below 1.5 g/L (R2 = 0.90 and 0.83, respectively). At 0.31 g/L total nitrogen, wheat feed hydrolysate achieved the highest production, yielding 72.20 +/- 1.53 g/L of sophorolipid crude extract and 60.05 +/- 0.56 g/L of diacetylated lactonic C18:1 at shake flask scale with productivities of 0.43 and 0.36 g/L/h, respectively. Results were confirmed in a 2-L bioreactor increasing 15 % diacetylated lactonic C18:1 production. Moreover, wheat feed hydrolysate supplemented only with a hydrophobic carbon source was able to produce mainly diacetylated lactonic C18:1 congener (88.5 % wt.), suggesting that the composition of the hydrolysate significantly influences the congeners profile. Overall, this study provides valuable insights into agricultural byproduct hydrolysates as potential nitrogen feedstocks for sophorolipid production and their further application on industrial biotechnology. |
| https://doi.org/10.1016/j.wasman.2024.05.048 |
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