Development of Aurantiochytrium limacinum SR21 cultivation using salt-rich waste feedstock for docosahexaenoic acid production and application of natural colourant in food product. (January 2019)

• Record Type: Journal Article
• Authors: Leong, Hui Yi; Su, Chien-An; Lee, Bo-Sheng; Lan, John Chi-Wei; Law, Chung Lim; Chang, Jo-Shu; Show, Pau Loke
• Is Part Of: Bioresource technology. Volume 271(2019)
• Page Start: 30
• Page End: 36
• Publication Date: 2019-01
• Subjects: Aurantiochytrium limacinum SR21 -- Microalgae biorefinery -- Docosahexaenoic acid -- Natural colourant -- Salt-rich waste feedstock; 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.2018.09.093
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: K2 HPO4 -waste feedstock is a potential replacement for KH2 PO4 in the cultivation. The waste feedstock with working concentration of 0.005% (w/v) showed optimal results. Higher productions of lipid (8.29%) and DHA (128.81 mg.L −1 ) content were noted. Reduction in the cost of microalgal cultivation. Utilisation of natural colouring agents for hard candy production. Abstract: Microalgae biorefinery is presently receiving a lot of attention as driven by its production of high value-added products. In this study, an oleaginous microalga Aurantiochytrium limacinum SR21 was cultured for docosahexaenoic acid (DHA) production using 20% (w/v) of K2 HPO4 -waste feedstock to replace 0.005% (w/v) of KH2 PO4 in the flask culture. DHA is an essential nutrient for human's brain functionalities. Collectively, the K2 HPO4 -waste feedstock with working concentration of 0.005% (w/v) in the cultivation prompted a higher lipid content (8.29%) and DHA production (128.81 mg.L −1 ). Moreover, natural plant pigment products containing stabilised betacyanins were utilised as natural red colourants for hard candy production. This study develops microalgal cultivation using salt-rich waste feedstock for a higher lipid and DHA content as well as application of natural colouring agents in food products.