Complex mathematical analysis of photobioreactor system

Scheufele, Fabiano Bisinella; Hinterholz, Camila Larissa; Zaharieva, Maya M.; Najdenski, Hristo; Módenes, Aparecido Nivaldo; Trigueros, Daniela Estelita Góes; Borba, Carlos Eduardo; Espinoza‐Quiñones, Fernando Rodolfo; Kroumov, Alexander Dimitrov

doi:10.1002/elsc.201800044

Cited by 17 publications

(6 citation statements)

References 85 publications

(126 reference statements)

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“…An overview concerning this problem is elaborated in ref. []. The measurement of r CO2 requires off‐gas analysis and compensation of lost CO 2 in the effluent of continuous cultivations, e.g.…”

Section: Co2 Kinetics — Tailored Supply Of Carbon Sourcementioning

confidence: 99%

Microalgal kinetics — a guideline for photobioreactor design and process development

Schediwy

Trautmann

Steinweg

et al. 2019

Engineering in Life Sciences

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Kinetics generally describes bio‐(chemical) reaction rates in dependence on substrate concentrations. Kinetics for microalgae is often adapted from heterotrophs and lacks mechanistic foundation, e.g. for light harvesting. Using and understanding kinetic equations as the representation of intracellular mechanisms is essential for reasonable comparisons and simulations of growth behavior. Summarizing growth kinetics in one equation does not yield reliable models. Piecewise linear or rational functions may mimic photosynthesis irradiance response curves, but fail to represent the mechanisms. Our modeling approach for photoautotrophic growth comprises physical and kinetic modules with mechanistic foundation extracted from the literature. Splitting the light submodel into the modules for light distribution, light absorption, and photosynthetic sugar production with independent parameters allows the transfer of kinetics between different reactor designs. The consecutive anabolism depends among others on nutrient concentrations. The nutrient uptake kinetics largely impacts carbon partitioning in the reviewed stoichiometry range of cellular constituents. Consecutive metabolic steps mask each other and demand a maximum value understandable as the minimum principle of growth. These fundamental modules need to be clearly distinguished, but may be modified or extended based on process conditions and progress in research. First, discussion of kinetics helps to understand the physiological situation, for which ranges of parameter values are given. Second, kinetics should be used for photobioreactor design, but also for gassing and nutrient optimization. Numerous examples are given for both aspects. Finally, measuring kinetics more comprehensively and precisely will help in improved process development.

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Section: Co2 Kinetics — Tailored Supply Of Carbon Sourcementioning

confidence: 99%

Microalgal kinetics — a guideline for photobioreactor design and process development

Schediwy

Trautmann

Steinweg

et al. 2019

Engineering in Life Sciences

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“…Hence, research in the incubation stage is mainly focused on detecting whether there are any promising BAC in extracts of biomass from S. obliquus. Further, by using complex stress conditions, we were able to discriminate the concurrent hypothesis and to direct our research to fulfil the ideas of the integral biorefinery approach [8,9,89] Therefore, the chosen unexplored S. obliquus 8610 strain has a potential to be developed in the production stage as an ingredient of food or nutraceuticals.…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial and Antioxidant Potential of Scenedesmus obliquus Microalgae in the Context of Integral Biorefinery Concept

et al. 2022

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Small-scale photobioreactors (PBRs) in the inoculum stage were designed with internal (red or green) and external white LED light as an initial step of a larger-scale installation aimed at fulfilling the integral biorefinery concept for maximum utilization of microalgal biomass in a multifunctional laboratory. The specific growth rate of Scenedesmus obliquus (Turpin) Kützing biomass for given cultural conditions was analyzed by using MAPLE software. For the determination of total polyphenols, flavonoids, chlorophyll “a” and “b”, carotenoids and lipids, UHPLC-HRMS, ISO-20776/1, ISO-10993-5 and CUPRAC tests were carried out. Under red light growing, a higher content of polyphenols was found, while the green light favoured the flavonoid accumulation in the biomass. Chlorophylls, carotenoids and lipids were in the same order of magnitude in both samples. The dichloromethane extracts obtained from the biomass of each PBR synergistically potentiated at low concentrations (0.01–0.05 mg/mL) the antibacterial activity of penicillin, fluoroquinolones or oregano essential oil against the selected food-borne pathogens (Staphylococcus aureus, Escherichia coli and Salmonella typhimurium) without showing any in vitro cytotoxicity. Both extracts exhibited good cupric ion-reducing antioxidant capacity at concentrations above 0.042–0.08 mg/mL. The UHPLC-HRMS analysis revealed that both extracts contained long chain fatty acids and carotenoids thus explaining their antibacterial and antioxidant potential. The applied engineering approach showed a great potential to modify microalgae metabolism for the synthesis of target compounds by S. obliquus with capacity for the development of health-promoting nutraceuticals for poultry farming.

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“…There is no universal model for the description of Pl, but the reviews by Bechet et al ( 2013) and Kroumov et al (2016) have summarised some interesting models used to show the effect of light intensity on microalgae biomass production. The kinetic model developed thus far can be classified into 3 based on theoretical knowledge, namely type I model, type II model and type II model (Scheufele et al, 2018). The type I model shows that the rate of photosynthesis in well-mixed microalgae cultures is expressed as a function of the average light intensity within the culture.…”

Section: Modelling Of Light Intensity For Microalgae Biomass Productionmentioning

confidence: 99%

Microalgae Biomass Modelling and Optimization for Sustainable Biotechnology – A Concise Review

Ugya¹,

Meguellati²

2022

J. Ecol. Eng.

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The autotrophic forms of microalgae are referred to as "efficient biological factories", because they play a significant role in CO 2 removal from the atmosphere by utilizing it for the process of photosynthesis. The industrial application of microalgae biomass includes the production of cosmetics, health products, fertilisers, biofuel, feeds, and food. Microalgae biomass is also an important tool used in the treatment of wastewater. The current review is aimed at reviewing the progress and prospects of microalgae resource modelling and optimisation as a tool for sustainable biotechnology. The mechanism of biomass production by microalgae tends to vary according to whether the microalgae are autotrophic, heterotrophic, or mixotrophic organisms. In the current study, the modelling and optimisation of microalgae biomass production were discussed, as well as the modelling of CO 2 sequestration, light intensity, nutrients, and photobioreactor. The role of microalgal biomass production in attaining sustainable biotechnology has also been extensively studied. Microalgae are an emerging tool used in the phycoremediation of wastewater and reduction of high CO 2 level. The modelling and optimisation of microalgae biomass production will help to upscale the production of the microalgal based fuel and bioproducts from model scale to the money-making level.

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Complex mathematical analysis of photobioreactor system

Cited by 17 publications

References 85 publications

Microalgal kinetics — a guideline for photobioreactor design and process development

Microalgal kinetics — a guideline for photobioreactor design and process development

Antimicrobial and Antioxidant Potential of Scenedesmus obliquus Microalgae in the Context of Integral Biorefinery Concept

Microalgae Biomass Modelling and Optimization for Sustainable Biotechnology – A Concise Review

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