The Feasibility of Using Inland Desalination Concentrate (DC) as an Alternative Substrate for Spirulina platensis Mass Cultivation

Matos, Ângelo Paggi; Silva, Tiago da; Sant’Anna, Ernani Sebastião

doi:10.1007/s12649-020-01233-9

Cited by 9 publications

(8 citation statements)

References 49 publications

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“…This further indicates that N. gaditana fatty acid metabolism, exposed to suboptimal salinity, tends to synthesize higher saturated fatty acids and lower polyunsaturated fatty acids with increasing DC concentration in the culture medium 28 . Similar observations were reported for C. vulgaris and A. platensis fatty acid metabolism, that is, the proportion of unsaturated fatty acids (monounsaturated + polyunsaturated fatty acids) decreased, and the saturated fatty acids increased with increasing DC concentrations in the culture medium 17,51,56 . Functionally, increased synthesis of saturated fatty acids in algal cells can be explained by an adaptive osmoregulatory mechanism to cope with gradual or rapid changes in DC salinity combining with algal cell membrane permeability 40,65 …”

Section: Desalination Productionsupporting

confidence: 77%

“…For example, the specific growth rate, biomass productivity and protein composition of C. vulgaris significantly declined when inland DC concentration increased from 25% (2.0 mS cm −1 ) to 55% (3.1 mS cm −1 ), while lipid content increased sharply 17 . A similar pattern was reported in the cyanobacterium A. platensis when cultured in inland DC concentration ranging from 20 to 100% DC (EC values between 1.0 and 4.5 mS cm −1 ), associated with a decreased synthesis of phycocyanin 51 . The reduced protein and phycocyanin production in A. platensis cultured in high DC concentration is most likely due to a redirection of available energy towards processes for osmoregulation 65,66 .…”

Section: Desalination Productionsupporting

confidence: 69%

“…The halophilic microalga D. salina has been narrowed down to be an excellent candidate to be cultured in DC produced during the seawater desalination process due to its ability to tolerate high mineral salts strengths, with electrical conductivity (EC) ranging from 60.0 to 90.0 mS cm −1 46 . D. salina and the marine N. gaditana microalgae have been successfully cultured in inland DC with moderate EC (8.0 to 45.0 mS cm −1 ), 47,48 while freshwater species A. platensis , C. vulgaris and S. quadricauda were cultivated in inland brackish water DC that had low EC of 1.0–3.0 mS cm −1 17,51,57 . In general, the influence of DC‐salinity conductivity on growth rate of the algal species decreased in the order of D. salina > N. gaditana > A. platensis > C. vulgaris = S. quadricauda 17,18,33,51 .…”

Section: Desalination Productionmentioning

confidence: 99%

“…D. salina and the marine N. gaditana microalgae have been successfully cultured in inland DC with moderate EC (8.0 to 45.0 mS cm −1 ), 47,48 while freshwater species A. platensis , C. vulgaris and S. quadricauda were cultivated in inland brackish water DC that had low EC of 1.0–3.0 mS cm −1 17,51,57 . In general, the influence of DC‐salinity conductivity on growth rate of the algal species decreased in the order of D. salina > N. gaditana > A. platensis > C. vulgaris = S. quadricauda 17,18,33,51 . In addition, microscopic observations of most microalgal cells, especially those that have spherical shape such as N. gaditana and C. vulgaris , illustrated a decrease in size and volume of the cells as a visible response to the increased DC concentration in the culture medium 18,39 …”

Section: Desalination Productionmentioning

confidence: 99%

“…17 A similar pattern was reported in the cyanobacterium A. platensis when cultured in inland DC concentration ranging from 20 to 100% DC (EC values between 1.0 and 4.5 mS cm −1 ), associated with a decreased synthesis of phycocyanin. 51 The reduced protein and phycocyanin production in A. platensis cultured in high DC concentration is most likely due to a redirection of available energy towards processes for osmoregulation. 65,66 Still, the contents of all essential and nonessential amino acids detected in A. platensis cultured in 60% DC (3.0 mS cm −1 ) were lower than that found in A. platensis biomass cultivated in Zarrouk medium, 51 illustrating that DC medium not only affects the phycocyanin content but also diminishes protein and amino acid levels.…”

Section: Biomass Production and Intracellular Compounds Of Microalgae...mentioning

confidence: 99%

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Influence of desalination concentrate medium on microalgal metabolism, biomass production and biochemical composition

Matos,

Saldanha‐Corrêa,

Hurtado

et al. 2023

J of Chemical Tech & Biotech

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Reverse osmosis is currently the most promising method for addressing freshwater scarcity in numerous nations, enabling the production of drinkable water for human consumption. This process, however, generates a byproduct stream, known as desalination concentrate (DC), that is enriched with high concentrations of salts such as Na+ and Cl−, moderate levels of SO42−, Mg2+, Ca2+ and K+ and trace levels of Si, Fe3+, NO3− and PO43−, which can be suitable and valuable for microalgal metabolism and growth. Salt concentration in DC can significantly influence microalgal growth via effects through osmotic shock, salt stress and cellular ionic ratios. Under certain conditions, these salinity changes can have a positive impact on microalgal metabolism, such as the synthesis of lipophilic compounds that include lipids, fatty acids and carotenoids. This mini‐review aims to provide up‐to‐date information of recent studies conducted towards the use of DC as a potential substrate for microalgal cultivation as well as to summarize the response mechanism of microalgae when cultured in DC. Several laboratory‐based studies have examined the effect of different DC concentrations on the biochemical composition of microalgae grown either in photobioreactors or in raceway ponds. These studies have uncovered significant effects of DC on the synthesis of proteins, amino acids and phycocyanin in freshwater species like Chlorella vulgaris and Arthrospira platensis, where DC tends to hinder these processes. Conversely, experiments with halophilic Dunaliella salina and marine Nannochloropsis gaditana have demonstrated that increasing DC concentration can positively influence the production of β‐carotene, lipids and specific saturated fatty acids (C16:0 and C18:0), suggesting that these species can adapt to a broader range of DC salinities. Cultivating salinity‐tolerant microalgae in DC would greatly reduce the production cost of algal‐based products, offering a promising approach to enhance the profitability of desalination and microalgal industries. © 2023 Society of Chemical Industry (SCI).

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Section: Desalination Productionsupporting

confidence: 77%

Section: Desalination Productionsupporting

confidence: 69%

Section: Desalination Productionmentioning

confidence: 99%

Section: Desalination Productionmentioning

confidence: 99%

Section: Biomass Production and Intracellular Compounds Of Microalgae...mentioning

confidence: 99%

See 3 more Smart Citations

Influence of desalination concentrate medium on microalgal metabolism, biomass production and biochemical composition

Matos,

Saldanha‐Corrêa,

Hurtado

et al. 2023

J of Chemical Tech & Biotech

Self Cite

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Enhanced Arthrospira platensis Biomass Production Combined with Anaerobic Cattle Wastewater Bioremediation

et al. 2021

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Microalgae biomasses offer important benefits regarding macromolecules that serve as promising raw materials for sustainable production. In the present study, the microalgae Arthrospira platensis DHR 20 was cultivated in horizontal photobioreactors (HPBR), with and without temperature control, in batch mode (6 to 7 days), with anaerobically digested cattle wastewater (ACWW) as substrate. High dry biomass concentrations were observed (6.3–7.15 g L −1 ). Volumetric protein, carbohydrate, and lipid productivities were 0.299, 0.135, and 0.108 g L −1 day −1 , respectively. Promising lipid productivities per area were estimated between 22.257 and 39.446 L ha −1 year −1 . High CO 2 bio-fixation rates were recorded (875.6–1051 mg L −1 day −1 ), indicating the relevant potential of the studied microalgae to mitigate atmospheric pollution. Carbon concentrations in biomass ranged between 41.8 and 43.6%. ACWW bioremediation was satisfactory, with BOD 5 and COD removal efficiencies of 72.2–82.6% and 63.3–73.6%. Maximum values of 100, 95.5, 92.4, 80, 98, and 94% were achieved concerning the removal of NH 4 + , NO 3 − , P t , SO 4 2− , Zn, and Cu, respectively. Total and thermotolerant coliform removals reached 99–99.7% and 99.7–99.9%. This microalgae-mediated process is, thus, promising for ACWW bioremediation and valuation, producing a microalgae biomass rich in macromolecules that can be used to obtain friendly bio-based products and bioenergy. Supplementary Information The online version contains supplementary material available at 10.1007/s12155-021-10258-4.

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Use of Microalgae for the Development of Biofertilizers and Biostimulants

Braun

Colla

2022

Bioenerg. Res.

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The Feasibility of Using Inland Desalination Concentrate (DC) as an Alternative Substrate for Spirulina platensis Mass Cultivation

Cited by 9 publications

References 49 publications

Influence of desalination concentrate medium on microalgal metabolism, biomass production and biochemical composition

Influence of desalination concentrate medium on microalgal metabolism, biomass production and biochemical composition

Enhanced Arthrospira platensis Biomass Production Combined with Anaerobic Cattle Wastewater Bioremediation

Use of Microalgae for the Development of Biofertilizers and Biostimulants

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