Spirulina sp. LEB 18 cultivation in a raceway-type bioreactor using wastewater from desalination process: Production of carbohydrate-rich biomass. (September 2020)

• Record Type: Journal Article
• Authors: Mata, Saulo Nascimento; de Souza Santos, Thaís; Cardoso, Lucas Guimarães; Andrade, Bianca Bomfim; Duarte, Jessica Hartwig; Costa, Jorge Alberto Vieira; Oliveira de Souza, Carolina; Druzian, Janice Izabel
• Is Part Of: Bioresource technology. Volume 311(2020)
• Publication Date: 2020-09
• Subjects: Biomass composition -- Bioremediation -- Desalination process -- Microalgae -- Wastewater; 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.2020.123495
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Biomass production (1.14 g L -1 ) in wastewater from the desalination process; Removal: 83.11% of Phosphate; 96.43% Zinc and 96.99% Nitrogen nitrate; High carbohydrate (52.29%) and lipids (12.79%) content in Spirulina sp. LEB18; Higher theoretical bioethanol production (27.71 mL/100 g biomass); Major fatty acids: C15:1 (41.83%) and C18:2n6t (24.55%). Abstract: This study aimed to evaluate the biomass production of Spirulina sp. LEB 18 cultivated in wastewater from the desalination process. The outdoor cultivations (210 L) were performed using as culture medium 100% wastewater supplemented with 25% of Zarrouk constituents (Tcs). In parallel, it was performed a control assay using 100% Zarrouk constituents. The biomass production in Tcs assay (1.14 g L -1 ) was only 9% lower than the control assay (1.25 g L -1 ). The Tcs assay showed a higher content of carbohydrates (52.29%), lipids (12.79%) and ash (2.69%) compared to the control assay (47.91; 7.59 and 1.29%, respectively). The biomass from the control and Tcs assays had mostly monounsaturated fatty acids C15:1 and C18:2n6t. The Spirulina sp. LEB 18 could use efficiently the nutrients from the wastewater, showing high removal efficiency of NO3– (96.99%), PO4 (83.11%) and Z (96.43%). At the same time, high added value biomolecules were produced for different purposes.