Effect of culturing parameters on the vegetative growth of <i>Haematococcus alpinus</i> (strain lcr‐cc‐261f) and modeling of its growth kinetics

Mazumdar, Nilanjana; Novis, Phil M.; Visnovsky, Gabriel; Gostomski, Peter

doi:10.1111/jpy.12889

Cited by 4 publications

(1 citation statement)

References 68 publications

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“…This was due to the fact that a homogenous culture medium could not be provided because of low aeration in the constant t m experiment, and during the constant k L a experiment, cells might have been exposed to shear stress and lost their flagella through bubble burst at the liquid-gas interface because of the higher aeration rate of 1.8 L/min. A similar result was observed for Haematococcus alpinus, an alpine strain of Haematococcus, where the moderate aeration rates did not affect cell growth negatively but further increases in airflow slowed cell growth and caused cell enlargement (Mazumdar et al, 2019). In addition, the transformation of vegetative green cells into red cysts was observed towards the end of culture in most PBR productions (results not shown).…”

Section: Resultssupporting

confidence: 79%

Evaluation of different scale-up strategies for Haematococcus pluvialis cultivation in airlift photobioreactors

Güler¹,

Deniz²,

Demirel³

et al. 2022

ase

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Large scale algal biomass production can be very challenging due to the potential issues of sustainability, environmental ethics, and economic concerns. A strategic approach to the transition from the laboratory to the industrial scale allows the prediction of process characteristics, design and analysis of large scale systems, and reduction of extra costs. In this study, a scale-up procedure that considered different approaches was carried out by selecting the Haematococcus pluvialis as a model organism. Three scale-up parameters (constant mixing time (t m ), volumetric power consumption rate (P/V), and oxygen mass transfer coefficient (k L a)) were tested for biomass production in a 2-L airlift photobioreactor and they were compared with those obtained from a 1-L aerated cultivation bottle. Among three strategies, the maximum cell concentration, 4.60±0.20×10 5 cells/mL, was obtained in a constant volumetric power consumption rate experiment. Also, total carotenoid amount showed similar changes with the cell concentration and reached the maximum concentration of 2.02±0.11 mg/L under constant P/V experiment. However, the cultivation bottle presented the highest biomass amount of 0.62 g/L and specific growth rate of 0.38 day -1 of all of the photobioreactors. This result might be attributed to the low aeration rates or improper configuration of the system, which created a non-homogenous culture medium and led to ineffective mass transfer.

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Section: Resultssupporting

confidence: 79%

Evaluation of different scale-up strategies for Haematococcus pluvialis cultivation in airlift photobioreactors

Güler¹,

Deniz²,

Demirel³

et al. 2022

ase

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Alkali-Resistant Domestication of Bacillus pasteurii and Its Growth Kinetics in Sodium Carboxymethyl Cellulose Solid-Free Drilling Fluids

Zhang,

Li,

Chang

et al. 2024

ACS Omega

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Microbially induced calcium carbonate precipitation (MICP) provides a novel approach for use in addressing the instabilities of borehole walls comprising broken formations, but the highly alkaline environments of drilling fluids are unfavorable for microbial growth. Therefore, this study investigated the alkaliresistant domestication of Bacillus pasteurii commonly used in MICP. Using gradient domestication, B. pasteurii was domesticated under different pH conditions (pH 8.0, 9.0, 10.0, and 11.0) in sodium carboxymethyl cellulose solid-free drilling fluids. Its growth patterns and variations in urease activity were analyzed to assess the effectiveness of domestication. The Gompertz and logistic models were used to fit the growth patterns of B. pasteurii under different pH conditions, and growth kinetic models were constructed based on the mean square error, Akaike information criterion, and coefficient of determination. The bacterial concentration and urease activity of B. pasteurii were enhanced after alkali-resistant gradient domestication. The Gompertz model accurately described the growth patterns of B. pasteurii after gradient domestication at pH 8.0, 10.0, and 11.0, whereas the logistic model accurately described the growth pattern after gradient domestication at pH 9.0. This study provides scientific evidence and a theoretical basis for the use of B. pasteurii in maintaining the stabilities of borehole walls comprising broken formations.

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Modelos matemáticos y parámetros cinéticos relacionados con la producción de astaxantina en Haematococcus pluvialis

Kurmen

2022

Revista Mutis

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La microalga biflagelada unicelular de agua dulce Haematococcus pluvialis tiene una gran importancia industrial al ser considerada una fuente de producción natural de astaxantina, carotenoide utilizado como colorante y compuesto bioactivo. Este microorganismo es el principal productor de astaxantina de mejor calidad. La inducción de caroteno génesis se logra cuanto mayor es la exposición a condiciones de estrés, pues se genera así la mayor acumulación de astaxantina. Se ha observado también que, si las células están expuestas a un exceso de condiciones de estrés, el crecimiento celular cesa por completo y las células comienzan a morir en un tiempo relativamente corto, lo que dificulta su producción. El objetivo de esta revisión es conocer los modelos usados para describir la cinética de crecimiento de H. pluvialis y establecer los parámetros cinéticos que mejor expliquen el crecimiento de la microalga para emplearlos en el cultivo en laboratorio y su escalamiento en biorreactores o fotobiorreactores (fbr). Los modelos matemáticos más aplicados para el monitoreo del crecimiento de la microalga son el logístico, Baranyi-Roberts, exponencial y Monod. Se han propuesto modelos cinéticos de crecimiento teniendo en cuenta parámetros como la irradiancia y el color de luz. Los parámetros cinéticos usados son la velocidad máxima de crecimiento (µmáx), el tiempo de duplicación (td), la biomasa inicial (Xo), la biomasa final (Xf) y la productividad del carotenoide (Yp/Ys), para establecer las condiciones óptimas de cultivo y producción del carotenoide, utilizando los coeficientes de correlación que genera el modelo, a fin de garantizar el cultivo de la microalga bajo las condiciones seleccionadas y validar los datos encontrados.

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Effect of culturing parameters on the vegetative growth of Haematococcus alpinus (strain lcr‐cc‐261f) and modeling of its growth kinetics

Cited by 4 publications

References 68 publications

Evaluation of different scale-up strategies for Haematococcus pluvialis cultivation in airlift photobioreactors

Evaluation of different scale-up strategies for Haematococcus pluvialis cultivation in airlift photobioreactors

Alkali-Resistant Domestication of Bacillus pasteurii and Its Growth Kinetics in Sodium Carboxymethyl Cellulose Solid-Free Drilling Fluids

Modelos matemáticos y parámetros cinéticos relacionados con la producción de astaxantina en Haematococcus pluvialis

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