Basic oxygen furnace slag as a support material for the cultivation of indigenous marine microalgae. (December 2021)

• Record Type: Journal Article
• Authors: Chen, Chun-Yen; Zhuang, Kai-Wei; Chang, Yu-Han; Nagarajan, Dillirani; Huang, Chieh-Chen; Chang, Jo-Shu
• Is Part Of: Bioresource technology. Volume 342(2021)
• Publication Date: 2021-12
• Subjects: Artificial reef -- Attached growth -- Basic Oxygen Furnace Slag (BOFS) -- Microalgae -- Tetraselmis suecica; 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.2021.125968
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Basic Oxygen Furnace Slag (BOFS) as a novel attachment substrate for microalgae. Attached cultivation of Tetraselmis suecica on BOFS yielded 2.52 mg/g slag. Process parameter optimization increased the yield to 6.38 mg/g slag. Slag with attached microalgae can be further used as seeds for regrowth. BOFS slag with attached Tetraselmis biomass could be a potential artificial reef. Abstract: Attached cultivation of microalgae is a suitable strategy for attaining high biomass productivity with effortless harvesting. This study evaluates the feasibility of using Basic Oxygen Furnace Slag (BOFS) as a carrier for microalgae cultivation. Among the three indigenous microalgae (namely, Chlorella sorokiniana PTC13, Tetraselmis suecica SC5, and Nannochloropsis oceanica DG), which were examined for their capability of attached growth on BOFS, T. suecica SC5 showed the best attached-growth performance (2.52 mg/g slag). Optimizing the cultivation parameters (agitation rate, 200 rpm; added sodium acetate, 1 g/L; light intensity, 300 µmol/m 2 /s) further enhanced the attached biomass yield to 6.38 mg/g slag. The microalgae-attached slag can be used as the seed for re-growth for three additional cycles and the biomass yield and productivity both enhanced from 6.00 to 11.58 mg/g slag and 497 to 760 mg/L/d, respectively. This study demonstrated the potential of using T. suecica SC5-attached BOFS to construct artificial reefs.