Lipid Induction in Dunaliella salina Culture Aerated with Various Levels CO2 and Its Biodiesel Production

Bouaid, Abderrahim

doi:10.4172/2155-9546.1000223

Cited by 8 publications

(3 citation statements)

References 42 publications

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“…It is thought that under high CO 2 concentration, biosynthesis of lipid compounds may be increased over other components, mainly proteins compounds, by fixing more carbon, as a reserve form of energy for the algal growth. This result is also confirmed by other reports that have correlated elevation of metabolic of CO 2 with increase in lipid biosynthesis in many microalgae (Tang et al, 2011;Abd El Baky et al, 2014). Similarly, it is also possible that the high lipid content found in many species of algae is a result of an adaptive strategy for mitigation of CO 2 in its natural environment.…”

Section: Resultssupporting

confidence: 89%

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Saifuddin¹,

Aisswarya²,

Juan³

et al. 2015

J. of Applied Sciences

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A B S T R A C T Microalgae can provide solutions to the twin challenges of energy security and environmental pollution. They can capture carbon dioxide in the flue gas thereby reducing greenhouse gas and also producing algal biomass, which can be converted into biofuel. The present study evaluated the effects on growth and lipid content of Nannochloropsis sp., under reduced nitrogen content and enrichment with sodium carbonate/bicarbonate derived from flue gas. Studies have been conducted to identify and develop efficient lipid induction techniques in microalgae, such as nutrients stress (e.g., nitrogen and/or phosphorus starvation), osmotic stress, radiation, pH, temperature, heavy metals and other chemicals. Our results showed that the total lipid productivity of Nannochloropsis sp. cultures aerated with five different CO 2 levels (1, 10, 15, 20 and 25% CO 2 ) had the highest lipid level of 18.93 mg LG 1 dayG 1 for the 15% CO 2 . The growth using soluble carbonates was slightly better than when using only CO 2 gas as carbon source. The 20% flue gas solution gave maximum yield of dry biomass of 0.55 g, while the maximum yield of dry biomass for 15% dissolved CO 2 gas was around 0.44 g. In terms of nitrogen level; the concentration of nitrogen at 0.882 mM gave the best growth and biomass amount. Those with lower nitrogen had their growth and biomass reduced by almost 5 times. Lipid productivity increased when exposing the culture to nitrogen starvation condition. The 100% N cultures (0.882 mM) yielded the lowest lipid productivity, while the 25% N cultures (0.353 mM) showed the highest productivity of lipid. The cells that grew in the lowest nitrogen content showed slightly more than twice the productivity of oil production compared with the one with 100% N cultures. This work has described the favorable conditions for lipid production by Nannochloropsis sp. in respect to CO 2 gas, soluble carbonates and different nitrogen concentrations.

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Section: Resultssupporting

confidence: 89%

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Saifuddin¹,

Aisswarya²,

Juan³

et al. 2015

J. of Applied Sciences

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“…El Baky et. al., [34] have also reported that the lipid content was increased from 2.33% to 40.65% by rising CO2 levels from 0.01% to 12.0%, respectively, during the cultivation of marine microalgae species Dunaliella salina [34]. At elevated CO2 concentrations, the microalgae may prioritize the synthesis of lipids over other components, specifically proteins.…”

Section: Resultsmentioning

confidence: 97%

Spirulina Cultivation Using Biogas CO₂ as the Carbon Source: Preliminary Study on Biomass Growth and Productivity

Kumar Oruganti,

Kumar Kumara,

Tejavath

et al. 2023

E3S Web Conf.

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Anthropogenic activities are causing a rapid increase in global carbon dioxide (CO2) emissions, which significantly contribute to global warming. Microalgae can be a sustainable solution for simultaneous wastewater treatment and sequestering CO2 through photosynthesis. The current study reports a comparative evaluation of Spirulina sp. microalgal biomass growth and lipid productivity during its cultivation supplied with air and biogas from an anaerobic digester. It was observed that there was a 4-fold increase in biomass productivity in the reactor sparged with biogas compared to air supply. The reactor sparged with biogas showed a significant increase in lipid content. This increase in biomass productivity could be attributed to the increased availability of CO2, favoring algal growth.

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“…27 In other studies, which microalgae were cultivated under different stress conditions, D. salina could reach up to 20%-51% lipids. 28,29 Almutari found values between 5.88 ± 0.85% and 24.86 ± 2.30% varying the concentrations of nitrogen and phosphorus in the culture medium, 30 ). At the optimum condition, lipid content of 50.89% was obtained.…”

Section: Lipid Content and Propertiesmentioning

confidence: 98%

Assessing the application of marine microalgae Dunaliella salina in a biorefinery context: production of value‐added biobased products

Félix,

Hidalgo,

de Carvalho

et al. 2024

Biofuels Bioprod Bioref

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Microalgae are a rich source of bioactive compounds such as pigments, carbohydrates, lipids, proteins, and other substances of interest. Thus, given the possible variety of products that can be obtained from them, it is important to determine their biochemical composition, taking into consideration the species and cultivation conditions, so that they can be used as feedstock in biorefineries, with the aim of using all the biomass in the biorefining processes and increasing its economic viability. This work aimed to characterize the biochemical composition of the microalgae Dunalliela salina in a multi‐product biorefinery context, focusing on the production of high value‐added compounds such as pigments and biofuels. The biomass concentration obtained was 1.15 g·L−1 and the volumetric productivity was 164.28 mg·L−1·day−1, providing fractions of 23.86 ± 0.24% of lipids, 10.80 ± 0.86% of carbohydrates, and 5.71 ± 0.50% of proteins. The microalgal biomass contained pigment concentrations of 0.896 and 0.5380 mg·g−1of chlorophylls a and b, and 0.2043 mg·g−1 of total carotenoids. Thus, the data suggest that D. salina has biotechnological potential for application in integrated multi‐product biorefineries, focused on obtaining energy and high added value products simultaneously.

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Lipid Induction in Dunaliella salina Culture Aerated with Various Levels CO2 and Its Biodiesel Production

Cited by 8 publications

References 42 publications

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Spirulina Cultivation Using Biogas CO₂ as the Carbon Source: Preliminary Study on Biomass Growth and Productivity

Assessing the application of marine microalgae Dunaliella salina in a biorefinery context: production of value‐added biobased products

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Lipid Induction in Dunaliella salina Culture Aerated with Various Levels CO2 and Its Biodiesel Production

Cited by 8 publications

References 42 publications

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Sequestration of High Carbon Dioxide Concentration for Induction of Lipids in Microalgae for Biodiesel Production

Spirulina Cultivation Using Biogas CO2 as the Carbon Source: Preliminary Study on Biomass Growth and Productivity

Assessing the application of marine microalgae Dunaliella salina in a biorefinery context: production of value‐added biobased products

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Spirulina Cultivation Using Biogas CO₂ as the Carbon Source: Preliminary Study on Biomass Growth and Productivity