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Design and Scale-up of External-Loop Airlift Bioreactor .

Design and Scale-up of External-Loop Airlift Bioreactor .

Hydrodynamics and oxygen transfer in external-loop airlift bioreactor were discussed. New models of gas hold-up and volumetric mass transfer coefficient were developed. They are based on the hydrodynamic model in which the similarity between the liquid circulation in airlift bioreactors and the natural convection is considered The models .

Fermention Technology

Fermention Technology

what types of microorganisms may be sensitive to the antibiotic. The sailor other source of microorganisms is diluted only to a cell concentration such that agar plates prepared from these dilutions will be crowded with individual colonies on the surface of .

Hydrodynamic Modelling of Internal Loop Airlift Reactor .

Hydrodynamic Modelling of Internal Loop Airlift Reactor .

An approach based on mechanistic principles was used to point out a relationship between the gas holdups in the riser and downcomer of internal-loop airlift reactors without gas-liquid separators.

External Loop Airlift Reactor - Transgenic Plants

External Loop Airlift Reactor - Transgenic Plants

Mar 25, 2020 · A, air inlet; G, gas exhaust. with high turbulence. Three common airlift configurations, the internal loop airlift reactor, the external loop airlift reactor, and the draught tube airlift reactor, are shown in Fig. 4b d. Airlift reactors of types c and d are also available as constructions using suitable foil material (39-41). E. Packed Bed Reactor

Survey of gas-liquid mass transfer in bioreactors

Survey of gas-liquid mass transfer in bioreactors

The bubble column and internal-loop airlift bioreactor have similar gas-liquid mass transfer rates; however, the bubble column has significant backmixing while the airlift bioreactor has lower bioreactor volume utilization. The external-loop airlift bioreactor provides more process and mixing control and generally has lower shear rates, but

Global hydrodynamic of hybrid external loop airlift .

Global hydrodynamic of hybrid external loop airlift .

Jul 01, 2018 · The airlift loop reactor consists of interrelated sections such as: a riser, a downcomer, a gas separator and a bottom sections. The mixing inside these reactors is induced by the fine air bubbles expansion, which help to promote both transport and aeration. . Two types of airlift reactors are currently in use, . : external-loop and .

Bioprocessing of differentiated plant in vitro systems .

Bioprocessing of differentiated plant in vitro systems .

Oct 16, 2012 · More sophisticated designs of air agitated bioreactors are the airlift bioreactor (ALR) systems (Fig. 1B). ALR contain a draft tube (internal or external loop) that provides liquid circulation by creating direct airflow and a sparger at the bottom for gas exchange 6, 26. The defined flow pattern is an advantage that enhances oxygen mass .

Industrial Microbiology Btech. 6 Sem | Chemical Reactor .

Industrial Microbiology Btech. 6 Sem | Chemical Reactor .

residence time reduces gas friction in downcomer. Airlift Reactor Types: INTERNAL LOOP ALR: baffles placed strategically in a single vessel create the channels required for the circulation. Shortest path that a bubble cover from the riser to the downcomer is a straight line. EXTERNAL LOOP ALR: circulation takes place through separate and

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Full text of "ERIC ED345934: The Language of Biotechnology .

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On the design and simulation of an airlift loop bioreactor .

On the design and simulation of an airlift loop bioreactor .

Sep 01, 2009 · This paper presents the many advantages of a microbubble generation mechanism actuated by fluidic oscillation – potential low energy consumption, high heat, mass, and momentum transfer rates, flotation and flocculation potential – and argued for its inclusion in a standard design of a draught tube internal loop airlift bioreactor.

Magnetic field assisted fluidization - CiteSeerX .

Magnetic field assisted fluidization - CiteSeerX .

An external-loop airlift photo-bioreactor (3.5 l working volume) was employed by Li ZY et al. (2007) for cultivation of S. platensis (Figure 25D). The magnetization (up to 550 mT) was performed by a solenoid through which the airlift downcomer passes. The growth curves of S. platensis under various field intensities in the solenoid are shown in

BIOREACTORS, AIR-LIFT REACTORS

BIOREACTORS, AIR-LIFT REACTORS

Internal-loop split ALR Internal-loop concentric tube reactor External-loop ALR Figure 1. Different types of ALRs. BIOREACTORS, AIR-LIFT REACTORS J.C. MERCHUK M. GLUZ Ben-Gurion University of the Negev Beer-Sheva, Israel KEY WORDS Bubble column Fluid dynamics Gas hold-up Heat transfer Liquid flow Mass transfer Scale-up Three-phase airlift .

Magnetic field assisted fluidization - CiteSeerX .

Magnetic field assisted fluidization - CiteSeerX .

An external-loop airlift photo-bioreactor (3.5 l working volume) was employed by Li ZY et al. (2007) for cultivation of S. platensis (Figure 25D). The magnetization (up to 550 mT) was performed by a solenoid through which the airlift downcomer passes. The growth curves of S. platensis under various field intensities in the solenoid are shown in

Air Lift Fermenter

Air Lift Fermenter

Air-lift fermenter is an efficient contactor for the reactions involved gases, liquids and solids. There are two types of air-lift fermenters which are the internal loop and the external loop. The internal loop has a draft tube in its inner tube, in which the up-flowing gasses liquid and the down-flowing liquid is separated by the draft tube.

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Full text of "Chemical Process Dynamics and Controls"

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P&ID Symbols (Complete List & PDF) - Projectmaterials

P&ID Symbols (Complete List & PDF) - Projectmaterials

ISA SYMBOLOGY. The symbology for the identification of the measurement and control instrumentation on the flow and process diagrams and on the P&ID (Piping & Instrument Diagram), commonly called P&I (Piping & Instrumentation), is generally compliant with the Standard ISA (Instrumentation Society of Automation) identified as S.5, that is composed of identification codes and graphic symbols.

Airlift bioreactor ppt

Airlift bioreactor ppt

Airlift bioreactor ppt 1. AIR LIFTBIOREACTORBEENISH SARFRAZ 2. INTRODUCTION. typical motionless bioreactor where the internal circulation and mixing are achieved by bubbling air." Employ forced/ pressurized air to circulate cells and nutrient medium. Can be used to culture cells that highly shear-sensitive. gas stream facilitate exchange of material between the gas phase and the medium .

percobaan  inggris | Chemical Reactor | Gases

percobaan inggris | Chemical Reactor | Gases

3.1. Pipe-Loop Bioreactors for SCP Production. The contin- uous manufacture of proteins by the biochemical oxidation of gaseous hydrocarbons in the presence of a nitrogenous nutrient has been achieved using horizontal and vertical closed-loop reactors, vertical airlift reactors, as well as vertical U-loop reactors [ 10, 11, 27, 38 ].

Fluidized bed reactor - Open Source Ecology

Fluidized bed reactor - Open Source Ecology

4. Gas flow controller for main port and possibly substrate and catalyst. Pressure sensor and control. Gas recycle and gaseous product collection 5. Gas analyzer 6. Gas and liquid phase separation. 7. Gas product separation for ethylene via gas fractionation column or gas scrubber gas recycle without gaseous production. 8.

Chemical Engineering Science (v.60, #22) |

Chemical Engineering Science (v.60, #22) |

The use of segmented flow in capillaries, also known as Taylor flow, for reaction engineering purposes has soared in recent years. On the one hand, Taylor flow has been used in .

Design principles of photo‐bioreactors for cultivation of .

Design principles of photo‐bioreactors for cultivation of .

To overcome this problem, gas tubes along the cultivation tubes can be used, providing multiple gassing and degassing points. In an optimal design the downcomer would also be in the illuminated side of the airlift reactor, see Fig. 7 for the flat plate airlift, where the downcomer is in the middle of the plate.

Airlift - LinkedIn SlideShare

Airlift - LinkedIn SlideShare

Sep 15, 2011 · this ppt is abt one of the types of fermenters used for bioprocessing. hope its useful!! Slideshare uses cookies to improve functionality and performance, and to .

US8178330B2 - Fermentation of gaseous substrates - Google .

US8178330B2 - Fermentation of gaseous substrates - Google .

US8178330B2 US13/058,727 US201013058727A US8178330B2 US 8178330 B2 US8178330 B2 US 8178330B2 US 201013058727 A US201013058727 A US .

Airlift bioreactor ppt - LinkedIn SlideShare

Airlift bioreactor ppt - LinkedIn SlideShare

Jan 11, 2013 · Airlift bioreactor ppt 1. AIR LIFTBIOREACTORBEENISH SARFRAZ 2. INTRODUCTION. typical motionless bioreactor where the internal circulation and mixing are achieved by bubbling air." Employ forced/ pressurized air to circulate cells and nutrient medium. Can be used to culture cells that highly shear-sensitive. gas stream facilitate exchange of material between the gas .

Bioreactor Design - Future is BioTechnology.

Bioreactor Design - Future is BioTechnology.

Figure 6.1 shows an airlift bioreactor with an internal loop cycle of fluid flow. 6.3.3 Loop Bioreactor A modified type of airlift system with gas and liquid flow patterns in which a pump trans-ports the air and liquid through the vessel. Here, an external loop is used, with a mechanical pump to remove the liquid. Gas and circulated liquid are .

Airlift bioreactor ppt

Airlift bioreactor ppt

Airlift bioreactor ppt 1. AIR LIFTBIOREACTORBEENISH SARFRAZ 2. INTRODUCTION. typical motionless bioreactor where the internal circulation and mixing are achieved by bubbling air." Employ forced/ pressurized air to circulate cells and nutrient medium. Can be used to culture cells that highly shear-sensitive. gas stream facilitate exchange of material between the gas phase and the medium .

Gas hold-up in external-loop airlift bioreactors .

Gas hold-up in external-loop airlift bioreactors .

A new model of gas hold-up is proposed for external-loop airlift bioreactors. It is based on the similarity between the liquid circulation due to the local variation of gas hold-up in airlift bioreactors and the natural convection due to temperature difference. The model is developed to include the case of non-Newtonian fermentation media which are involved in many industrially bioprocesses.

Dictionary.of.Chemical.Engineering.pdf

Dictionary.of.Chemical.Engineering.pdf

An external-loop air-lift-type reactor consists of a U-tube within which the sparging takes place promoting oxygen transfer and liquid circulation. air lock 1. Trapped air or some other gas or vapour within a pipe that prevents the inten-tional flow of a liquid. 2. The intentional seal in a process that relies on a differential pres-

Gas-phase trichloroethylene removal by Rhodococcus opacus .

Gas-phase trichloroethylene removal by Rhodococcus opacus .

May 01, 2020 · An Internal loop airlift bioreactor was subjected to continuous operations for removal of trichloroethylene vapors. • A maximum of 96% TCE removal was obtained up to inlet TCE loading rate of 20 g m −3 h −1.. The linear correlation of CO 2 production and TCE elimination capacity support the findings in this study.. ANN model applied to predict the outlet TCE concentration and the .

Types of fermenter - SlideShare

Types of fermenter - SlideShare

Apr 16, 2016 · It is essentially a gas tight baffled riser tube connected to the downcomer tube. Air or gas mixture—introduced into the base of the riser by a sparger during normal operating conditions. The driving force for circulation of medium in vessel is produced by the differences in density between the liquid column in the riser and in the down comer .