CO2 conversion by the integration of biological and chemical methods: Spirulina sp. LEB 18 cultivation with diethanolamine and potassium carbonate addition. (November 2018)

• Record Type: Journal Article
• Authors: Cardias, Bruna Barcelos; Morais, Michele Greque de; Costa, Jorge Alberto Vieira
• Is Part Of: Bioresource technology. Volume 267(2018)
• Page Start: 77
• Page End: 83
• Publication Date: 2018-11
• Subjects: Biomass composition -- Chemical absorbents -- CO2 biofixation -- Cyanobacteria -- Microalgae; 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.2018.07.031
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The Spirulina growth is higher with chemical absorbents added in its cultivation. Microalgae cultivation with chemical absorbent mixtures increases CO2 biofixation. Spirulina shows an increase in the carbohydrate content with absorbent mixtures. Potassium carbonate in Spirulina cultivation increases the phycocyanin concentration. Abstract: The aim of this work was to evaluate if the addition of the chemical absorbents diethanolamine and potassium carbonate affects the CO2 biofixation, growth and biomass composition of Spirulina sp. LEB 18. The association of the diethanolamine (DEA) and potassium carbonate (K2 CO3 ) absorbents increased the dissolved inorganic carbon concentration in the cultivation medium, allowing greater CO2 biofixation by the Spirulina . Higher biomass concentration (2.1 g L −1 ) and maximum productivity (174.2 mg L −1 d −1 ) were observed with the mixture of 1.64 mmol L −1 of DEA and 0.41 mmol L −1 of K2 CO3 . In this cultivation condition, Spirulina sp. LEB 18 showed high protein content (58.8 w w −1 ) and an increased carbohydrate concentration (23.7% w w −1 ). The addition of these absorbent concentrations may be applied in the cultivation of Spirulina sp. LEB 18 to increase CO2 biofixation and cell growth.