| Title | Fermentative production of astaxanthin from sorghum distillery residue by an indigenous Aurantiochytrium sp. CJ6 strain using a continuous-feeding fed-batch process |
|---|---|
| ID_Doc | 29365 |
| Authors | Yen, SW; Nagarajan, D; Chen, WH; Lee, DJ; Chang, JS |
| Title | Fermentative production of astaxanthin from sorghum distillery residue by an indigenous Aurantiochytrium sp. CJ6 strain using a continuous-feeding fed-batch process |
| Year | 2023 |
| Published | |
| Abstract | In this study, Aurantiochytrium sp. CJ6 was cultivated heterotrophically on a waste resource, sorghum distillery residue (SDR) hydrolysate without adding any nitrogen sources. Mild sulfuric acid treatment released sugars that supported the growth of CJ6. Optimal operating parameters (salinity, 2.5%; pH, 7.5; with light exposure) determined using batch cultivation attained biomass concentration and astaxanthin content of 3.72 g/L and 69.32 mu g/g dry cell weight (DCW), respectively. Using continuous-feeding fed-batch (CF-FB) fermentation, the biomass concentration of CJ6 increased to 6.3 g/L with biomass productivity and sugar utilization rate of 0.286 mg/L/d and 1.26 g/L/d, respectively. Meanwhile, CJ6 obtained maximum astaxanthin content (93.9 mu g/g DCW) and astaxanthin concentration (0.565 mg/L) after 20-day cultivation. Thus, the CF-FB fermentation strategy seems to have a high potential for the cultivation of thraustochytrids to produce the high-value product (astaxanthin) using SDR as the feedstock to achieve circular economy. |
No similar articles found.