Spirulina cultivation with a CO2 absorbent: Influence on growth parameters and macromolecule production

Abstract

The objective of this study was to select a concentration of CO2 absorbents to supplement Spirulina sp. LEB 18 cultivation and to evaluate the effect of these compounds on the growth and production of macromolecules. Three initial biomass concentrations (X0), eight concentrations of monoethanolamine (MEA), and three NaOH concentrations were tested. The selected MEA concentrations did not inhibit the growth of Spirulina and doubled the dissolved inorganic carbon concentration in the assay medium in relation to the concentration of NaOH. The protein concentration in the biomass grown with MEA was, on average, 17% higher than that obtained with NaOH. Thus, it was found that MEA did not reduce the productivity of Spirulina sp. LEB 18, and its use can be further explored as a means for converting the carbon dissolved in the medium to biomolecules.

The use of monoethanolamine and potassium glycinate solvents for CO 2 delivery to microalgae through a polymeric membrane system

“…Some studies have shown that low concentrations (up to 300 ppm) of MEA can be used as a CO2 absorbent in the medium to enhance CO2 solubility and improve the growth of various microalgae (Scenedesmus sp., Spirulina sp.) [43,44]. However, MEA is a toxic chemical.…”

Large-Scale Cultivation of Spirulina for Biological CO2 Mitigation in Open Raceway Ponds Using Purified CO2 From a Coal Chemical Flue Gas

“…It is reported that up to 7% of global CO 2 emissions can be attributed to the anthropogenic emission of CO 2 from coal-fired thermoelectric plants (Morais and Costa, 2007). With respect to CO 2 sequestration, different technologies have been investigated, such as using amines or solid adsorbents (da Rosa et al, 2016;Sepulveda et al, 2019). Cardias et al (2018) reported that the growth of Spirulina sp.…”

Trends, application and future prospectives of microbial carbonic anhydrase mediated carbonation process for CCUS

“…In the presence of MEA (0.13 g MEA g biomass −1 ), an increase in protein concentration by 17% was reported (Rosa et al . ). On the contrary, the growth in biomass depends on the types of solvent and microalgae employed (Kim et al .…”

“…Various bacteria, algae and their CAs have been reported as having a positive effect on the process parameters of post-combustion CO 2 capture (Vinoba et al 2013;Ye and Lu 2014;Salmon and House 2015). In the presence of MEA (0.13 g MEA g biomass À1 ), an increase in protein concentration by 17% was reported (Rosa et al 2016). On the contrary, the growth in biomass depends on the types of solvent and microalgae employed Sun et al 2015).…”