Enhancement of Carbon Conversion and Value-Added Compound Production in Heterotrophic Chlorella vulgaris Using Sweet Sorghum Extract

Kangping Wu, Yilin Fang, Biyuan Hong, Yihui Cai, Honglei Xie, Yunpu Wang, Xian Cui, Zhigang Yu, Yuhuan Liu, Roger Ruan, Qi Zhang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

High-cost carbon sources are not economical or sustainable for the heterotrophic culture of Chlorella vulgaris. In order to reduce the cost, this study used sweet sorghum extract (SE) and its enzymatic hydrolysate (HSE) as alternative carbon sources for the heterotrophic culture of Chlorella vulgaris. Under the premise of the same total carbon concentration, the value-added product production performance of Chlorella vulgaris cultured in HSE (supplemented with nitrogen sources and minerals) was much better than that in the glucose medium. The conversion rate of the total organic carbon and the utilization rate of the total nitrogen were both improved in the HSE system. The biomass production and productivity using HSE reached 2.51 g/L and 0.42 g/L/d, respectively. The production of proteins and lipids using HSE reached 1.17 and 0.35 g/L, respectively, and the production of chlorophyll-a, carotenoid, and lutein using HSE reached 30.42, 10.99, and 0.88 mg/L, respectively. The medium cost using HSE decreased by 69.61% compared to glucose. This study proves the feasibility and practicability of using HSE as a carbon source for the low-cost heterotrophic culture of Chlorella vulgaris.

Original languageEnglish (US)
Article number2579
JournalFoods
Volume11
Issue number17
DOIs
StatePublished - Sep 2022

Bibliographical note

Funding Information:
This research was funded by the National Natural Science Foundation of China (Nos. 22106062, 21878139, 21878237, and 22166026), the Natural Science Foundation of Jiangxi Province (Nos. 20212BAB214063 and 20181BBF60026) and the Research Project of the State Key Laboratory of Food Science and Technology of Nanchang University (SKLF-ZZB-202122).

Publisher Copyright:
© 2022 by the authors.

Keywords

  • biomass production
  • carbon source
  • Chlorella vulgaris
  • nutrient utilization
  • sweet sorghum

PubMed: MeSH publication types

  • Journal Article

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