Mapping of microalgae culturing via radioactive particle tracking

Pairing Experimental and Mathematical Modeling Studies on Fluidized Beds for Enhancement of Models Predictive Quality: A Current Status Overview

“…On the opposite side of each source, there is an arch array of 15 collimated Sodium Iodine (NaI(TI)) scintillation detectors, each of 2 inch in diameter. Each detector is covered by a lead collimator that provides a 5 × 2 mm opening, in order to detect narrow γ-ray beams, and to enhance the spatial resolution and minimize the scattered γ-rays [116]. As shown in Figure 5, the sources and detectors are mounted on a horizontal rotary plate, which can also move in the axial direction.…”

Image segmentation with fast distance transform (FDT) and morphological skeleton in microalgae Raceway culture systems applications

“…In order to describe the hydrodynamic behavior in bioreactors, various techniques have been developed. Some of them involve the use of radioactive particles, spheres of some materials that simulate conditions of a certain substance and computational simulations that involve the growth of microalgae (Sabri, et al, 2018;Lizardi-Jiménez and Gutiérrez-Rojas, 2011;Rarrek, et al, 2019). This research focuses on the binary image processing of a Raceway bioreactor, which is widely used for the cultivation of microalgae (Kanhaiya et al, 2015: May-Cua et al, 2019.…”

Local volumetric mass transfer coefficient estimation for Scenedesmus microalgae culture in a cylindrical airlift photobioreactor

“…For efficient culturing of Scenedesmus spp., it is important to understand many growth parameters, such as hydrodynamics (liquid velocity field, turbulence kinetic energy, Reynolds shear stresses, gas‐holdup distribution, bubble size and local interfacial area), physical properties of the culture medium and mass transfer coefficients. In cylindrical airlift columns such paramaters have been covered extensively in previous studies 12–19 . However, there remains a lack of comprehensive research on the mass transfer processes in cylindrical split PBRs in real culturing systems.…”

“…In cylindrical airlift columns such paramaters have been covered extensively in previous studies. [12][13][14][15][16][17][18][19] However, there remains a lack of comprehensive research on the mass transfer processes in cylindrical split PBRs in real culturing systems. A few studies on mass transfer in bubble columns and airlift reactors are available in the literature, [5][6][7] with an emphasis on estimating and investigating the mass transfer coefficient (k l a) through mechanistic or empirical methods.…”

“…The gas phase used in these studies is usually air, with pure oxygen sometimes used as a tracer for mass transfer analysis; the liquid phase varies from tap water and seawater 8,18 to alcohol solutions and different aqueous solution of carboxyl methyl cellulose (CMC) solution concentrations. 9,10 Although limited literature on the study of mass transfer processes in real microalgae cultures is available, [11][12][13][14][15] the use of different algae strains, PBR geometry and volumes, and the methods used for estimating the mass transfer coefficient prevent a direct comparison among them. Also, variation in k l a has been studied concerning superficial gas velocity, power input and gas holdup in various liquids, but no attempt has been made to track the changes in k l a with an increase in the culture density as it grows inside a PBR.…”