Growth-dependent radiative properties of Chlorella vulgaris and its influence on prediction of light fluence rate in photobioreactor

Ma, Chunyang; Zhao, Junming; Liu, L. H.; Zhang, L.

doi:10.1007/s10811-018-1499-x

Cited by 6 publications

(4 citation statements)

References 56 publications

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“…Temporal changes of the light distribution occur due to the evolution of cell density and the adaptation of the pigmentation and cell size [86,87], which determine the radiation characteristics of the cell culture [78,[88][89][90]. In case of outdoor cultivation, also the diurnal and seasonal variations of sunlight cause temporal changes of light availability, as they affect the incoming light intensity and possibly the cellular composition [11].…”

Section: Reaction Environment In Photobioreactors 221 Light Distributionmentioning

confidence: 99%

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Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review

Luzi¹,

McHardy

2022

Energies

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Computational Fluid Dynamics (CFD) have been frequently applied to model the growth conditions in photobioreactors, which are affected in a complex way by multiple, interacting physical processes. We review common photobioreactor types and discuss the processes occurring therein as well as how these processes have been considered in previous CFD models. The analysis reveals that CFD models of photobioreactors do often not consider state-of-the-art modeling approaches. As a comprehensive photobioreactor model consists of several sub-models, we review the most relevant models for the simulation of fluid flows, light propagation, heat and mass transfer and growth kinetics as well as state-of-the-art models for turbulence and interphase forces, revealing their strength and deficiencies. In addition, we review the population balance equation, breakage and coalescence models and discretization methods since the predicted bubble size distribution critically depends on them. This comprehensive overview of the available models provides a unique toolbox for generating CFD models of photobioreactors. Directions future research should take are also discussed, mainly consisting of an extensive experimental validation of the single models for specific photobioreactor geometries, as well as more complete and sophisticated integrated models by virtue of the constant increase of the computational capacity.

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Section: Reaction Environment In Photobioreactors 221 Light Distributionmentioning

confidence: 99%

“…Modeling frameworks that retrieve the optical properties of cells and cell cultures from composition, shape and structure have been proposed in references [78,88,187]. Besides, a large body of measured optical properties is available for several species [77,78,87,89,90,[188][189][190][191][192][193].…”

Section: Light Transfer Modelsmentioning

confidence: 99%

Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review

Luzi¹,

McHardy

2022

Energies

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“…• τ rx (24) Now, using the first order Taylor approximation of the logarithmic function (at x = 0), Equation 25, results in Q as given by Equation (26).…”

Section: Plant Distributionmentioning

confidence: 99%

“…Nonetheless, they can still be measured experimentally with more or less difficulty and related to some parameters of the cell, as detailed in [ 24 ]. Furthermore, these radiative properties of microalgae (the absorption cross-section, scattering cross-section and scattering phase function) vary significantly over time, depending on the strain’s growth stage, as shown by the studies [ 25 , 26 ]. As all these radiative parameters depend on the wavelength of light and because they vary in such a significant way through time, it can be considered that the values obtained by an RGB camera would correctly identify not only the strain, but its growth’s state.…”

Section: Communications Modellingmentioning

confidence: 99%

Optical Camera Communication as an Enabling Technology for Microalgae Cultivation

Jurado-Verdú

Guerra

Matus

et al. 2021

Sensors

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Optical Camera Communication (OCC) systems have a potential application in microalgae production plants. In this work, a proof-of-concept prototype consisting of an artificial lighting photobioreactor is proposed. This reactor optimises the culture’s photosynthetic efficiency while transmitting on-off keying signals to a rolling-shutter camera. Upon reception, both signal decoding and biomass concentration sensing are performed simultaneously using image processing techniques. Moreover, the communication channel’s theoretical modelling, the data rate system’s performance, and the plant distribution requirements and restrictions for a production-scale facility are detailed. A case study is conducted to classify three different node arrangements in a real facility, considering node visibility, channel capacity, and space exploitation. Finally, several experiments comprising radiance evaluation and Signal-to-Noise Ratio (SNR) computation are performed at different angles of view in both indoor and outdoor environments. It is observed that the Lambertian-like emission patterns are affected by increasing concentrations, reducing the effective emission angles. Furthermore, significant differences in the SNR, up to 20 dB, perceived along the illuminated surface (centre versus border), gradually reduce as light is affected by greater dispersion. The experimental analysis in terms of scattering and selective wavelength attenuation for green (Arthrospira platensis) and brown (Rhodosorus marinus) microalgae species determines that the selected strain must be considered in the development of this system.

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Light absorption and scattering by high light-tolerant, fast-growing Chlorella vulgaris IPPAS C-1 cells

et al. 2020

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Growth-dependent radiative properties of Chlorella vulgaris and its influence on prediction of light fluence rate in photobioreactor

Cited by 6 publications

References 56 publications

Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review

Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review

Optical Camera Communication as an Enabling Technology for Microalgae Cultivation

Light absorption and scattering by high light-tolerant, fast-growing Chlorella vulgaris IPPAS C-1 cells

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