Gas Balances and Growth in Algal Cultures

Morales, Marcia; Cabello, Juan J.; Revah, Sergio

doi:10.1007/978-3-319-20200-6_8

Cited by 5 publications

(3 citation statements)

References 109 publications

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“…Table 3 shows the results of the calculations carried out to obtain the hydrodynamic parameters of the bubble column PBR. As stated in the report made by (Morales et al, 2015), according to the values of the hydrodynamic parameters in Table 3, the work regime of the present study was in the range of homogeneous bubbling type flow.…”

Section: Resultsmentioning

confidence: 68%

“…In relation to the PBR, Valdez-Cruz and Trujillo-Roldan ( 2006) point out that the main disadvantage of these systems is that the hydrodynamic stress that acts on the cells is variable, due to the irregular changes in the flow in all directions. and in the related time, during each experiment, these are reasons for possible sub-lethal damage in cells due to shear stress (Morales et al, 2015;Trujillo-Roldan and Galindo, 2003;Valdez-Cruz and Trujillo-Roldan, 2006;Robles-Heredia, 2014); Furthermore, another possible cause would be considering the low light intensity in the experiments, causing the cells to not adapt to the conditions of the culture medium, producing these results (Morales et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

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Study of the hydrodynamic effect in column PBR on cellular growth, nitrogen removal, lipid productivity and fatty acid profile in Chlorella vulgaris.

Robles-Heredia¹,

Ruiz-Marín²,

Narváez-García³

et al. 2022

Renew. energ. biomass sustain

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In this work we analyzed different biochemical parameters such as cell growth, nitrogen removal, lipid productivity and fatty acid profile in Chlorella vulgaris by hydrodynamic effect varying the aeration to (0.75, 1.25, 1.75, 2.25) vvm and white light conditions continuous in column photobioreactor; hydrodynamic calculations of the FBR were carried out to determine the shear rate and possible existence of hydrodynamic stress at the proposed aeration conditions; the values reached in the shear rate were reduced (0.0025 to 0.0220) s-1, observing flow of homogeneous type in all the experiments; however, the maximum values of cell growth and specific growth rate (μ) were (5.90x106 cells mL-1 and 0.0229 d-1) respectively, as well as the highest N consumption (60%) and the highest productivity of lipids (8.98 mgL-1d-1) were reached during the experiment at 0.75 vvm. In relation to the analysis of the fatty acid profile greater presence of polyunsaturated fatty acids (PUFA) was observed in the experiments at 0.75 vvm, 1.75 vvm and 2.25 vvm, however, at 1.25 vvm, higher productivity of saturated fatty acids (SFA) was obtained; with respect to monounsaturated fatty acids (MUFA) the highest concentration was reflected at 0.75 vvm. The components with the highest presence in the fatty acid profile analysis were C12: 0; C20: 5N3; C24: 1; C 22: 0; C22: 2.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Study of the hydrodynamic effect in column PBR on cellular growth, nitrogen removal, lipid productivity and fatty acid profile in Chlorella vulgaris.

Robles-Heredia¹,

Ruiz-Marín²,

Narváez-García³

et al. 2022

Renew. energ. biomass sustain

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“…This enhanced conversion of CO2 into biomass could be a consequence of potentially activated metabolic pathways due to glucose addition as well as glucose-derived metabolites. In the meantime, CO2 concentrating mechanism (CCM) that plays a vital role in carbon fixation in microalgae may be affected due to the mass balances among different CO2 forms as well as the balance between CO2 and O2 (Morales et al, 2015).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris

Guđmundsson

Wichuk

et al. 2019

Science of The Total Environment

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To convert waste CO2 from flue gases of power plants into value-added products, biomitigation technologies show promise. In this study, we cultivated a fast-growing species of green microalgae, Chlorella vulgaris, in different sizes of photobioreactors (PBRs) and developed a strategy using small doses of sugars for enhancing CO2 sequestration under light-emitting diode illumination. Glucose supplementation at low levels resulted in an increase of photoautotrophic growth-driven biomass generation as well as CO2 capture by 10% and its enhancement corresponded to an increase of supplied photon flux. The utilization of urea instead of nitrate as the sole nitrogen source increased photoautotrophic growth by 14%, but change of nitrogen source didn't compromise glucose-induced enhancement of photoautotrophic growth. The optimized biomass productivity achieved was 30.4% higher than the initial productivity of purely photoautotrophic culture. The major pigments in the obtained algal biomass were found comparable to its photoautotrophic counterpart and a high neutral lipids productivity of 516.6 mg/(L•day) was achieved after optimization. A technoeconomic model was also developed, indicating that LED-based PBRs represent a feasible strategy for converting CO2 into value-added algal biomass.

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Nutrient composition of culture media induces different patterns of CO2 fixation from biogas and biomass production by the microalga Scenedesmus obliquus U169

Choix

Polster

Corona-González

et al. 2017

Bioprocess Biosyst Eng

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Microalgae are considered as a promising biotechnological strategy to capture CO from biogas, producing biomass with valuable energetic compounds. This study has evaluated the biotechnological potential to fix CO from biogas and biomass production by Scenedesmus obliquus cultured in four different formulations of culture media, C30, Bristol, Bold 3N, and C30+M, as well as the effect of methane (CH) of biogas during CO fixation and biomass production. The results obtained showed that different nutrient composition and concentration of culture media, mainly micronutrient and vitamin concentrations, induced different patterns of CO fixation from biogas and biomass production in S. obliquus. The highest CO fixation (23.03 ± 0.24%) and biomass production (4.63 ± 0.31 g L) were attained in the microalgae growing in C30+M medium, accumulating mainly proteins. Moreover, these results demonstrated that the CH of biogas did not affect CO fixation from biogas and biomass production by S. obliquus. Overall, these results demonstrated that a culture medium with a balanced nutrient supply is crucial to increasing the biotechnological potential of microalgae to fix CO from biogas.

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Gas Balances and Growth in Algal Cultures

Cited by 5 publications

References 109 publications

Study of the hydrodynamic effect in column PBR on cellular growth, nitrogen removal, lipid productivity and fatty acid profile in Chlorella vulgaris.

Study of the hydrodynamic effect in column PBR on cellular growth, nitrogen removal, lipid productivity and fatty acid profile in Chlorella vulgaris.

Sugar-stimulated CO2 sequestration by the green microalga Chlorella vulgaris

Nutrient composition of culture media induces different patterns of CO2 fixation from biogas and biomass production by the microalga Scenedesmus obliquus U169

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