A green decontamination technology through selective biomineralization of algicidal microorganisms for enhanced astaxanthin production from Haematococcus pluvialis at commercial scale. (July 2021)

• Record Type: Journal Article
• Authors: Yu, Byung Sun; Hong, Min Eui; Sung, Young Joon; Choi, Hong Il; Chang, Won Seok; Kwak, Ho Seok; Sim, Sang Jun
• Is Part Of: Bioresource technology. Volume 332(2021)
• Publication Date: 2021-07
• Subjects: Haematococcus pluvialis -- Astaxanthin -- Algicidal microorganism -- CaCO3 biomineralization-based decontamination strategy -- Mixotrophic culture mode; 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.2021.125121
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Green decontamination tool was created to eliminate predators cidal to H. pluvialis. CBDS was conducted at mild alkalinity and low CaCl2 for non-calcifying H. pluvialis. CBDS showed an efficient removal of algicidal bacteria and fungi during cultivation. Astaxanthin production using CBDS was significantly enhanced in H. pluvialis. Large-scale outdoor astaxanthin production in H. pluvialis was improved by CBDS. Abstract: Currently, there is a lack of an efficient, environmentally-benign and sustainable industrial decontamination strategy to steadily achieve improved astaxanthin production from Haematococcus pluvialis under large-scale outdoor conditions. Here, this study demonstrates for the first time that a CaCO3 biomineralization-based decontamination strategy (CBDS) is highly efficient in selectively eliminating algicidal microorganisms, such as bacteria and fungi, during large-scale H. pluvialis cultivation under autotrophic and mixotrophic conditions, thereby augmenting the astaxanthin productivity. Under outdoor AT and MT conditions, the average astaxanthin productivity of H. pluvialis using CBDS in a closed photobioreactor system was substantially increased by 14.85- (1.19 mg L −1 d −1 ) and 13.65-fold (2.43 mg L −1 d −1 ), respectively, compared to the contaminated H. pluvialis cultures . Given the exponentially increasing demand of astaxanthin, a natural anti-viral, anti-inflammatory, and antioxidant drug, CBDS will be a technology of interest in H. pluvialis -based commercial astaxanthin production which has been hindered by the serious biological contaminations.