Strengthening mass transfer with the Tesla-valve baffles to increase the biomass yield of Arthrospira platensis in a column photobioreactor

Kubar, Ameer Ali; Cheng, Jun; Kumar, Santosh; Liu, Shuzheng; Chen, Shutong; Tian, Jianglei

doi:10.1016/j.biortech.2020.124337

Cited by 24 publications

(13 citation statements)

References 46 publications

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“…Additionally, the amount of air supplied improved mixing of the medium, keeping algal cells in suspension, eliminating thermal stratification, helping nutrient distribution, improving gas exchange, reducing the degree of shading, and the probability of photoinhibition. However, it has been reported that an excessive increase in the airflow in scaled-up cultivation of microalgae can cause shear stress, damaging the cell and affecting its growth and the production of metabolites of interest [ 13 , 15 , 23 ]. The highest airflow (80 L min −1 ) was used for the culture of P. purpureum in the 80 L plastic bags and for the five individual plastic hanging-bag units that formed the 400 L culture.…”

Section: Resultsmentioning

confidence: 99%

“…These scale-up strategies are challenging because maintaining optimum light, temperature, mixing, and mass transfer in photobioreactors at large volumes is difficult [ 10 , 11 , 12 , 13 , 14 ]. The overall mass transfer coefficient (k L a) is the most commonly used parameter for evaluating photobioreactor performance and improving microalgae productivity [ 11 , 15 , 16 , 17 , 18 ]. Commonly, the k L a has been used as a scaling-up parameter in heterotrophic culture systems (i.e., bacteria and yeasts).…”

Section: Introductionmentioning

confidence: 99%

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Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

et al. 2021

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Porphyridium purpureum is a well-known Rhodophyta that recently has attracted enormous attention because of its capacity to produce many high-value metabolites such as the pigment phycoerythrin and several high-value fatty acids. Phycoerythrin is a fluorescent red protein-pigment commercially relevant with antioxidant, antimicrobial activity, and fluorescent properties. The volumetric mass transfer coefficient (kLa) was kept constant within the different scaling-up stages in the present study. This scaling-up strategy was sought to maintain phycoerythrin production and other high-value metabolites by Porphyridium purpureum, using hanging-bag photobioreactors. The kLa was monitored to ensure the appropriate mixing and CO2 diffusion in the entire culture during the scaling process (16, 80, and 400 L). Then, biomass concentration, proteins, fatty acids, carbohydrates, and phycoerythrin were determined in each step of the scaling-up process. The kLa at 16 L reached a level of 0.0052 s−1, while at 80 L, a value of 0.0024 s−1 was achieved. This work result indicated that at 400 L, 1.22 g L−1 of biomass was obtained, and total carbohydrates (117.24 mg L−1), proteins (240.63 mg L−1), and lipids (17.75% DW) were accumulated. Regarding fatty acids production, 46.03% palmitic, 8.03% linoleic, 22.67% arachidonic, and 2.55% eicosapentaenoic acid were identified, principally. The phycoerythrin production was 20.88 mg L−1 with a purity of 2.75, making it viable for food-related applications. The results of these experiments provide insight into the high-scale production of phycoerythrin via the cultivation of P. purpureum in an inexpensive and straightforward culture system.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

et al. 2021

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“…The systems have been engineered for mixing with optimization of time so that each cell can absorb light energy when exposed to light and use it for energy production in the dark period 48,49 . Performance improvement of PBRs was possible through improved and/or novel reactor configurations and by optimized/novel mixing and aeration strategies 93–96 . The coefficient of mass transfer (KL a ) is influenced by the type of sparger, agitation rate, surfactants or antifoam agents, and temperature.…”

Section: Key Factors Affecting Growth and Biomass Production Of Micro...mentioning

confidence: 99%

“…48,49 Performance improvement of PBRs was possible through improved and/or novel reactor configurations and by optimized/novel mixing and aeration strategies. [93][94][95][96] The coefficient of mass transfer (KLa) is influenced by the type of sparger, agitation rate, surfactants or antifoam agents, and temperature. Nevertheless, even today, gas sparging remains one of the most widely used strategies for CO 2 dissolution and mixing.…”

Section: Nitrogen Starvationmentioning

confidence: 99%

Microalgae cultivation: photobioreactors, CO₂ utilization, and value‐added products of industrial importance

Shekh

Sharma

Schenk

et al. 2021

J of Chemical Tech & Biotech

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Increasing world population, industrialization, and economic development demand more energy at a global scale, and this challenge is being met with the exploitation of fossil fuels that cause CO2 and CH4 emissions and contribute towards earth's rising temperature. Microalgae are considered potential sources for CO2 abatement and for combating food insecurity by ensuring a nutritional food supply for the sustainable living of an increasing population. The CO2 utilization potential of microalgae has been continuously researched for augmentation through various photobioreactor and open raceway pond designs and developments. Apart from recognition for their nutritional importance, microalgae are finding the place in the market as ‘functional foods’ due to their bioactive components. In view of this, the present study highlights the status and current attempts being made for photobioreactor development, CO2 sequestration, and the production of industrially important microalgal metabolites. This review also explains the factors responsible for microalgal growth and provides research needs and recommendations to make microalgal CO2 sequestration and value‐added compounds production an industrially competitive process. © 2021 Society of Chemical Industry (SCI).

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“…Mass transfer coefficients are often, although not routinely, measured by photobioreactor developers [3][4][5][6][7][8][9]. Knowing mass transfer capabilities is essential information for judging the potential of a photobioreactor's geometry to scale its performance when other bottlenecks are removed.…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

Moroni

Sed

Cicci³

et al. 2021

ChemEngineering

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It has been suggested that the energy-efficient production of microalgae biomass can be more easily obtained in short light path photobioreactors that can be operated at high biomass concentration. On the downside, however, high biomass concentrations also require an efficient gas exchange rate to avoid metabolic growth limitation or inhibition. A cascade photobioreactor featuring a thin liquid layer flowing down a sloping, wavy-bottomed surface can be operated at a biomass concentration that is much higher compared to most usual open-type equipment. Liquid flow, upon investigation, proved to exhibit peculiar “local recirculation” hydrodynamics, potentially conducive to the mixing of superficial and deep zones of the photobioreactor. Mass transfer coefficient represents a useful parameter to optimize the performance of a microalgal photobioreactor and its scale-up. The aim of the present article is to discuss the experimental mass transfer features of this novel type of photobioreactor and highlight expected opportunities and issues entailed by different ways of installing and operating such novel types of photobioreactors.

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Strengthening mass transfer with the Tesla-valve baffles to increase the biomass yield of Arthrospira platensis in a column photobioreactor

Cited by 24 publications

References 46 publications

Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

Microalgae cultivation: photobioreactors, CO₂ utilization, and value‐added products of industrial importance

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

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Strengthening mass transfer with the Tesla-valve baffles to increase the biomass yield of Arthrospira platensis in a column photobioreactor

Cited by 24 publications

References 46 publications

Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

Implementation of kLa-Based Strategy for Scaling Up Porphyridium purpureum (Red Marine Microalga) to Produce High-Value Phycoerythrin, Fatty Acids, and Proteins

Microalgae cultivation: photobioreactors, CO2 utilization, and value‐added products of industrial importance

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

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Product

Resources

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Microalgae cultivation: photobioreactors, CO₂ utilization, and value‐added products of industrial importance