Synergistic bioconversion of lipids and carotenoids from food waste by Dunaliella salina with fulvic acid via a two-stage cultivation strategy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiang Wang
  • Si-Fen Liu
  • Rui-Lan Xu
  • Zhi-Gang Zhou
  • Hong-Ye Li
  • Zheng Sun

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number113908
Journal / PublicationEnergy Conversion and Management
Volume234
Online published27 Feb 2021
Publication statusPublished - 15 Apr 2021

Abstract

Dunaliella salina is a promising microbial host for the sustainable production of bioenergy and valuable compounds. D. salina can be mixotrophically cultivated using a pure organic carbon source. However, pure organic carbon sources remarkably enhance the cost of cultivation and constrain the development of upscale microalgal cultivation. This study examined the feasibility of using low-value food waste supplemented with fulvic acid in D. salina mixotrophic cultivation for lipid and carotenoid accumulation. The glucose-rich hydrolysate was first obtained via enzymatic hydrolysis from selected food waste. This hydrolysate was an appropriate source of organic carbon for microalgal mixotrophy based on a two-stage cultivation strategy for investigating the biomass and accumulation of valuable products. In addition, fulvic acid, which contains oxygen-rich and carbon-poor functional groups, was used in the second stage to maximise the production of biomass (3.1 ± 0.2 g/L), lipids (0.75 ± 0.03 g/L) and carotenoids (0.52 ± 0.03 g/L). The biodiesel quality of the lipid derived from D. salina biomass based on food waste hydrolysate met the previously approved standards. These data illustrate a sustainable and efficient algal-based food waste biorefinery strategy for the co-production of bioenergy and bioactive compounds, and offer key insights to address the issues of global food waste and algal-based resource utilisation.

Research Area(s)

  • Carotenoid, Dunaliella salina, Food waste hydrolysate, Fulvic acid, Lipid

Citation Format(s)

Synergistic bioconversion of lipids and carotenoids from food waste by Dunaliella salina with fulvic acid via a two-stage cultivation strategy. / Wang, Xiang; Zhang, Man-Man; Liu, Si-Fen; Xu, Rui-Lan; Mou, Jin-Hua; Qin, Zi-Hao; Zhou, Zhi-Gang; Li, Hong-Ye; Lin, Carol Sze Ki; Sun, Zheng.

In: Energy Conversion and Management, Vol. 234, 113908, 15.04.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review