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Potential of a liquid foam-bed photobioreactor for .

Potential of a liquid foam-bed photobioreactor for .

highlighted in several studies [1–3]. A liquid foam-bed photobioreactor is an alternative photobioreactor concept to existing liquid-phase pho-tobioreactors [4]. This reactor configuration was developed in order to reduce the energy requirements related to harvesting and gas supply. The reduction in harvesting costs is based on increased .

An experimental investigation on the multiphase flows and .

An experimental investigation on the multiphase flows and .

sorokiniana in turbulently mixing short light-path photobioreactor. Biotechnol Prog 26:687–696 Lindken R, Merzkirch W (2000) Velocity measurements of liquid and gaseous phase for a system of bubbles rising in water. Exp Fluids 209:S194–S201 Liu Z, Zheng Y, Jia L, Zhang Q (2005) Study of bubble induced flow structure using PIV.

Microalgae production in liquid foam-bed photobioreactors .

Microalgae production in liquid foam-bed photobioreactors .

In order to separate the gas phase from the liquid phase containing algae, different methods for foam break-up will be tested, which are either based on self-drainage of the foam or based on the utilisation of foam breaking devices. Next, the performance of the foam-bed photobioreactor will be investigated, described and possibly further improved.

(PDF) Photobioreactor Design and Fluid Dynamics

(PDF) Photobioreactor Design and Fluid Dynamics

Photobioreactor design is a subject of great relevance for the attainment of a sustained development in modern technology,and has also considerable interest from the basic scientific and .

Investigations in an external-loop airlift photobioreactor .

Investigations in an external-loop airlift photobioreactor .

A two-phase gas-liquid flow was maintained with high mixing. Furthermore, a liquid-falling tube was used to enhance the liquid circulation velocity as the tube separated the gas-liquid phases.

MODELING ALGAL CULTIVATION IN A BUBBLE COLUMN .

MODELING ALGAL CULTIVATION IN A BUBBLE COLUMN .

The dispersed phase bubble populations were modeled with 10 size classes ranging from 0.1 to 12 mm. 3. RESULTS AND DISCUSSION Some results from the CFD simulations are presented in Figure 3. Figure 3. Liquid phase fractions and liquid velocities in the bubble column at superficial gas velocities 0.01 m/s on left, 0.025 m/s on right.

First Principles Model of a Tubular Photobioreactor for .

First Principles Model of a Tubular Photobioreactor for .

Assuming the same velocity for each component of the gas flow rate and no slip between the liquid phase and the gas phase, the gas transport can be modeled by changes in the cross-sectional area of the nitrogen A N 2 along the tube, being able to describe these changes by the following balance: (16) where A N 2,l is the cross-sectional area of .

Photobioreactors - an overview | ScienceDirect Topics

Photobioreactors - an overview | ScienceDirect Topics

A typical photobioreactor is a three-phase system comprising the liquid phase (medium), the solid phase (cells), and the gas phase. Light, which is the unique feature of photoreactors and is often addressed as the fourth phase, is the main parameter affecting reactor design as it determines microalgal growth and, thus, photosynthetic efficiency .

CFD Simulation of Algae Production in Airlift Photobioreactor

CFD Simulation of Algae Production in Airlift Photobioreactor

Oct 04, 2017 · The present study focuses on simulation of algae production by photosynthesis in an airlift photobioreactor (PBR) in a batch process. The simulation studies are carried out using computational fluid dynamics (CFD) software, considering mass transfer of CO 2 from gas phase to liquid phase and O 2 from liquid phase to gas phase.

Surfactant selection for a liquid foam‐bed photobioreactor .

Surfactant selection for a liquid foam‐bed photobioreactor .

A novel liquid foam‐bed photobioreactor has been shown to hold potential as an innovative technology for microalgae production. In this study, a foam stabilizing agent has been selected which fits the requirements of use in a liquid foam‐bed photobioreactor.

Iowa State photobioreactor research could speed biofuels .

Iowa State photobioreactor research could speed biofuels .

Jun 28, 2013 · The first challenge of the research is to accurately describe the multi-phase flow occurring in a photobioreactor. "You have a liquid growth medium circulating through the system," explained Olsen. "In addition to the turbulent fluid flow, you have gas bubbles that are reacting to the turbulence and causing their own turbulence.

Photobioreactor Suppliers, Manufacturer, Distributor .

Photobioreactor Suppliers, Manufacturer, Distributor .

Liquid Phase Photochemical Photobioreactor Outside-illuminated Photo Reactor Price. Country/Region: China. Main Products: glass reactor,rotary evaporator system,photochemical reactor system,freeze dryer,spray dryer. Total Revenue: Above US 100 Million. Top 3 Markets:

Surfactant selection for a liquid foam-bed photobioreactor.

Surfactant selection for a liquid foam-bed photobioreactor.

Surfactant selection for a liquid foam-bed photobioreactor. . Thirdly, for all surfactants tested the microalgae concentration is reduced in the foam phase compared to the liquid phase with exception of the cationic surfactant CTAB. Lastly, only BSA, Saponin, Tween 20, and the two Pluronics were not toxic at concentrations of 10 CMC or higher

Design Process of an Area-Efficient Photobioreactor .

Design Process of an Area-Efficient Photobioreactor .

The combination of decreased sunlight intensities, a short light path between the light guides inside the liquid phase of the photobioreactor, resembling a flat-panel photo-bioreactor, and intensive mixing of the liquid phase by rising air bubbles create an environment to achieve high photosynthetic yields. The goal of the GSC is to efficiently .

Comparison of four outdoor pilot-scale photobioreactors .

Comparison of four outdoor pilot-scale photobioreactors .

Dec 18, 2015 · The horizontal tubular photobioreactor consists of three loops of 80 m each (Fig. 4) connected via a manifold to a bubble column used for oxygen removal, temperature control, nutrient and antifoam addition (Silicone RE20 Snapsil, BRB international, The Netherlands). The horizontal photobioreactor was operated at a liquid velocity of 0.45 m s −1.

An Experimental Investigation on the Multiphase Flows in a .

An Experimental Investigation on the Multiphase Flows in a .

The turbulent mixing of multiphase flows inside the photobioreactor (i.e., liquid phase — water, gas phase — CO 2 and O 2, and solid phase — algae cells) is the core connecting the three key factors together. In the present study, a comprehensive experimental investigation is conducted to quantify the effects of turbulent mixing in .

Closed Photobioreactor System For Continued Daily In Situ .

Closed Photobioreactor System For Continued Daily In Situ .

May 02, 2013 · The term "liquid phase" includes both the liquid in the culture, and the liquid as a condensate, . corresponding to the "evaporated then condensed" liquid. Photobioreactor Apparatus #5 and Photobioreactor Apparatus #6 are two example photobioreactors which embody the invention illustrate the enrichment or enhanced ethanol .

Photobioreactor - CO2 SOLUTION INC.

Photobioreactor - CO2 SOLUTION INC.

Apr 17, 2003 · [0062] The culture unit (110) preferably comprises means, such as a pump, for removing a portion of the liquid culture from the photobioreactor (10) and means (60) for separating the removed portion of liquid culture into a liquid phase and into a solid phase which contains the organisms. As mentioned above, the separating means is preferably a .

Design, Operation, and Modeling of a Membrane .

Design, Operation, and Modeling of a Membrane .

A membrane photobioreactor was designed, implemented and used to grow the cyanobacterium Arthrospira platensis PCC 8005 in batch mode. Growth was followed directly by monitoring optical density and indirectly by measuring pressure increase due to the oxygen produced and separated from the liquid phase by diffusion through a hydrophobic membrane, and pH increase due to carbon consumption.

Microalgae Production in Liquid Foam-Beds

Microalgae Production in Liquid Foam-Beds

the liquid phase. Gas distributor creating small gas bubbles Rising foam-bed Objective In order to make improvements towards the economic profitability of photobioreactor systems, a novel microalgae cultivation system is being developed. Liquid fraction, light penetration, mass transfer and algal growth. Energy requirements: Gassing, liquid .

Airlift Reactor - an overview | ScienceDirect Topics

Airlift Reactor - an overview | ScienceDirect Topics

An airlift reactor is one type of bubble reactor with an internal draft-tube that promotes gas–liquid mass transfer and mixing [52, 53].Airlift reactors have been largely used for algae cultures [54–59].As shown in the left of Figure 7, an airlift reactor contains three regions: air-riser, down-comer, and disengagement zone.Bubbles are sparged into the air-riser, which may be on the inside .

Design of a Cylindrical Photobioreactor with Central .

Design of a Cylindrical Photobioreactor with Central .

space. Therefore, a photobioreactor with concentric tubes was modelled to verify the circulation of the culture medium. Computational Methods: The physics interface used was Turbulent Bubbly Flow with low gas concentration approximation and k-ε turbulence model. Fluid properties were the default for water (liquid phase) and air (gas phase).

Fiber Bragg Grating with Polyimide–Silica Hybrid Membrane .

Fiber Bragg Grating with Polyimide–Silica Hybrid Membrane .

Aug 28, 2014 · A microstructured fiber Bragg grating (MSFBG) was created to accurately and simultaneously monitor the cell growth of photosynthetic bacteria (PSB) Rhodopseudomonas palustris CQK 01 and the temperature in a photobioreactor. The proposed sensor was made from an FBG unit that was separated into three regions, an unperturbed region, and two etched regions with smooth .

Microalgae production in liquid foam-bed photobioreactors .

Microalgae production in liquid foam-bed photobioreactors .

The cultivation of algae in liquid-foams might have several advantages over other cultivation systems. These advantages are the increased mass transfer and CO2 removal efficiency due to the big interfacial surface area and the increased residence time in the photobioreactor.

Photobioreactor to cultivate and reproduce phototrophic .

Photobioreactor to cultivate and reproduce phototrophic .

The photobioreactor for the cultivation and reproduction of phototrophic organisms in liquid phase by reacting with gaseous, solid and/or liquid additives during illumination with sun- and/or artificial light for the extraction of biomass (5) and/or its metabolic products and the utilization of surplus light energy, comprises a device for controlling light transparency and heat input, and semi .

Advanced CFD model of multiphase photobioreactors for .

Advanced CFD model of multiphase photobioreactors for .

Figure 3.9 Stream function of the liquid phase in two-phase cases and effect of bubble. 58 Figure 3.10 Flow regime map for bubble–liquid two phase Taylor–Couette flow. ... 58 Figure 3.11 Comparison between simulated axial, radial and azimuthal liquid velocity in the annulus. The inner cylinder wall is shown on the bottom.

CFD Simulation of Algae Production in Airlift Photobioreactor

CFD Simulation of Algae Production in Airlift Photobioreactor

Oct 04, 2017 · The present study focuses on simulation of algae production by photosynthesis in an airlift photobioreactor (PBR) in a batch process. The simulation studies are carried out using computational fluid dynamics (CFD) software, considering mass transfer of CO 2 from gas phase to liquid phase and O 2 from liquid phase to gas phase.

Closed Photobioreactor System For Continued Daily In Situ .

Closed Photobioreactor System For Continued Daily In Situ .

May 02, 2013 · The term "liquid phase" includes both the liquid in the culture, and the liquid as a condensate, . corresponding to the "evaporated then condensed" liquid. Photobioreactor Apparatus #5 and Photobioreactor Apparatus #6 are two example photobioreactors which embody the invention illustrate the enrichment or enhanced ethanol .

Design principles of photo‐bioreactors for cultivation of .

Design principles of photo‐bioreactors for cultivation of .

Jul 30, 2009 · A typical photo‐bioreactor is a three phase system, namely the liquid phase which is the medium, the cells as the solid phase, and a gas phase. Light which is the unique feature of photo‐reactors is a superimposed radiation field, sometimes but not uniquely called a fourth phase. . A scalable photobioreactor system for efficient .

Proceedings of Eurotherm78 - Computational Thermal .

Proceedings of Eurotherm78 - Computational Thermal .

Fig. 1 (a) Micrograph of A.variabilis (b) schematic of the photobioreactor system considered. but only scattering particles, (8) the phase function of bubbles is computed from the Mie the-ory assuming the liquid phase is non-absorbing and bubbles are spherical,(9) the scattering