Cell wall breaking of Haematococcus pluvialis biomass facilitated by Baijiu jiuqu fermentation with simultaneously production of beverages. (July 2023)

• Record Type: Journal Article
• Authors: Zhang, Peng; Lu, Lan-Yi; Liao, Shuang-Yan; Xu, Gui-Ting; Liu, Xin-Yi; Hu, Zhang-Li; Xu, Ying; Wang, Li-Yan
• Is Part Of: Bioresource technology. Volume 379(2023)
• Publication Date: 2023-07
• Subjects: Microalgae -- Fermenting starter -- Hydrolyzing microorganisms -- Metabolomics; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2023.129041
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Baijiu jiuqu and Gutian hongqu are potential for cell wall-breaking application. Glucose supplement is vital for cell wall-breaking and improving flavor. The fermentation method yields a sweet fragrance without H. pluvialis sterilization. Fermentation slightly affects astaxanthin related molecules with fold change < 2. Abstract: The microalgae Haematococcus pluvialis is a commercial source of natural astaxanthin. However, mature cells develop rigid three-layer wall structures and a repulsive odor. This study applied a liquid static fermentation system to screen hydrolyzing microorganisms for cell wall hydrolysis. Baijiu jiuqu and Gutian hongqu were found to have promising potential for application. The fermentation using 2% baijiu jiuqu and 2% glucose for pre-activation achieved comparable recovery of carotenoids to homogenizer disruption methods and produced stable fragrance which may be attributed to ethyl octanoate, hexyl formate, and phenethyl butyrate, as revealed by gas chromatography-mass spectrometry analysis. The abundance of astaxanthin molecules was slightly affected by fermentation with fold change < 2, while molecules with higher fold change (>10) were mainly carbohydrates, lipids, and steroids proving the safety of the fermentation. This study provides a new scheme for the biorefining of Haematococcus. pluvialis, potentially contributing to the industrial production of natural astaxanthin.