Download or read book Study of the Hydrodynamics Mass Transfer and Energy Requirements of a Rectangular Air lift Bioreactor for Electrical Power Generation written by Stanimir S. Drandev and published by . This book was released on 2015 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the increasing importance of air-lift reactors, very little published information is available on how the ratio of aerated to non-aerated cross-sectional areas (Ad/Ar) of the reactor, and the aerating system affect the oxygen mass transfer, energy efficiency and other performance characteristics. The main goal of this work was to define the optimal operating conditions in terms of oxygen mass transfer, hydrodynamics and energy utilization in a rectangular air-lift reactor for use in a biological fuel cell by identifying its oxygen mass transfer coefficient and liquid circulation behavior. A new empirical model for the dependence of the mass transfer coefficient on the non-aerated to aerated compartment ratio in the air-lift reactor was developed and used for optimization of the operating conditions. We believe that this work may be useful for the design and optimization of biochemical and other processes that require air-lift reactors.
Download or read book An Introduction to Bioreactor Hydrodynamics and Gas Liquid Mass Transfer written by Enes Kadic and published by John Wiley & Sons. This book was released on 2014-03-14 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews and compares the major types of bioreactors, defines their pros and cons, and identifies research needs and figures of merit that have yet to be addressed Describes common modes of operation in bioreactors Covers the three common bioreactor types, including stirred-tank bioreactors, bubble column bioreactors, and airlift bioreactors Details less common bioreactors types, including fixed bed bioreactors and novel bioreactor designs Discusses advantages and disadvantages of each bioreactor and provides a procedure for optimal bioreactor selection based on current process needs Reviews the problems of bioreactor selection globally while considering all bioreactor options rather than concentrating on one specific bioreactor type
Download or read book Airlift Bioreactors written by M. Y. Chisti and published by Springer. This book was released on 1989-02-28 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamics and Mass Transfer Characteristics of an External Loop Airlift Reactor written by Aidan B. O'Sullivan and published by . This book was released on 1999 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bioreactor Modeling written by Jerome Morchain and published by Elsevier. This book was released on 2017-10-06 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic simulation of bioreactors is a challenge for both the industrial and academic worlds. Beyond the large number of physical and biological phenomena to be considered and the wide range of scales involved, the central difficulty lies in the need to account for the dynamic behavior of suspended microorganisms. In the case of chemical reactors, knowledge of the thermodynamic equilibrium laws at the interfaces makes it possible to produce macroscopic models by integrating local laws. Microorganisms, on the other hand, have the ability to modulate the rate of substrate assimilation. Moreover, the nature of the biochemical transformations results from a compromise between the needs of the cell and the available resources. This book revisits the modeling of bioreactors using a multi-scale approach. It addresses issues related to mixing, phase-to-phase transfers and the adaptation of microorganisms to variations in concentration, and explores the use of population balances for the simulation of bioreactors. By adopting a multidisciplinary perspective that draws on process engineering, fluid mechanics and microbiology, this book sheds new light on the particularity of bioprocesses in relation to physical and chemical phenomena. - Presents a multiphase description of bioreactor modeling - Includes a combination of concepts issued from different scientific fields to address a practical issue - Provides a detailed description of the population balance concept as applied to biological systems - Covers a set of illustrative examples of the interaction between hydrodynamics and biological response
Download or read book Hydrodynamics and Mass Transfer in an Internal Airlift Slurry Reactor for Process Intensification written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2nd International Conference on Bioreactor Fluid Dynamics written by Roger King and published by . This book was released on 1988 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamics and Mass Transfer in a Novel Airlift Fluidized bed Reactor written by Yuxiao Guo and published by . This book was released on 1996 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CFD Study of Full Scale Aerobic Bioreactors Evaluation of Dynamic O2 Distribution Gas Liquid Mass Transfer and Reaction written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: If advanced biofuels are to measurably displace fossil fuels in the near term, they will have to operate at levels of scale, efficiency, and margin unprecedented in the current biotech industry. For aerobically-grown products in particular, scale-up is complex and the practical size, cost, and operability of extremely large reactors is not well understood. Put simply, the problem of how to attain fuel-class production scales comes down to cost-effective delivery of oxygen at high mass transfer rates and low capital and operating costs. To that end, very large reactor vessels (>500 m3) are proposed in order to achieve favorable economies of scale. Additionally, techno-economic evaluation indicates that bubble-column reactors are more cost-effective than stirred-tank reactors in many low-viscosity cultures. In order to advance the design of extremely large aerobic bioreactors, we have performed computational fluid dynamics (CFD) simulations of bubble-column reactors. A multiphase Euler-Euler model is used to explicitly account for the spatial distribution of air (i.e., gas bubbles) in the reactor. Expanding on the existing bioreactor CFD literature (typically focused on the hydrodynamics of bubbly flows), our simulations include interphase mass transfer of oxygen and a simple phenomenological reaction representing the uptake and consumption of dissolved oxygen by submerged cells. The simulations reproduce the expected flow profiles, with net upward flow in the center of column and downward flow near the wall. At high simulated oxygen uptake rates (OUR), oxygen-depleted regions can be observed in the reactor. By increasing the gas flow to enhance mixing and eliminate depleted areas, a maximum oxygen transfer (OTR) rate is obtained as a function of superficial velocity. These insights regarding minimum superficial velocity and maximum reactor size are incorporated into NREL's larger techno-economic models to supplement standard reactor design equations.
Download or read book Multiphase Bioreactor Design written by Joaquim M.S. Cabral and published by CRC Press. This book was released on 2001-09-20 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioreaction engineering is fundamental to the optimization of biotechnological processes and the production of biochemicals by enzymes, microbial, plant and animal cells and higher organisms. A reference text for postgraduate students and researchers in biochemical engineering and bioreactor design, Multiphase Bioreactor Design describes the
Download or read book Hydrodynamic and Gas liquid Mass Transfer Considerations for the Design of Airlift Bioreactors written by M. Y. Chisti and published by . This book was released on 1988 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Basic Bioreactor Design written by Klaas van't Riet and published by CRC Press. This book was released on 1991-01-07 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a graduate course in biochemical engineering, provides the basic knowledge needed for the efficient design of bioreactors and the relevant principles and data for practical process engineering, with an emphasis on enzyme reactors and aerated reactors for microorganisms. Includes exercises,
Download or read book Hydrodynamics and Mass Transfer Studies of a Self inducing Gas liquid Stirred Tank Reactor written by Caroline Leguay and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agitator Design for Gas Liquid Fermenters and Bioreactors written by Gregory T. Benz and published by John Wiley & Sons. This book was released on 2021-03-05 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concise reference to designing mechanically sound agitation systems that will perform the process function efficiently and economically. Currently, all the books on bioreactor and fermenter design do not focus specifically on agitation. Sections cover agitator fundamentals, impeller systems, optimum power and air flow at peak mass transfer calculations, optimizing operation for minimum energy per batch, heat transfer surfaces and calculations, shaft seal considerations, mounting method, mechanical design, and vendor evaluation.
Download or read book CFD Study of Full Scale Aerobic Bioreactors written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: If advanced biofuels are to measurably displace fossil fuels in the near term, they will have to operate at levels of scale, efficiency, and margin unprecedented in the current biotech industry. For aerobically-grown products in particular, scale-up is complex and the practical size, cost, and operability of extremely large reactors is not well understood. Put simply, the problem of how to attain fuel-class production scales comes down to cost-effective delivery of oxygen at high mass transfer rates and low capital and operating costs. To that end, very large reactor vessels (>500 m3) are proposed in order to achieve favorable economies of scale. Additionally, techno-economic evaluation indicates that bubble-column reactors are more cost-effective than stirred-tank reactors in many low-viscosity cultures. In order to advance the design of extremely large aerobic bioreactors, we have performed computational fluid dynamics (CFD) simulations of bubble-column reactors. A multiphase Euler-Euler model is used to explicitly account for the spatial distribution of air (i.e., gas bubbles) in the reactor. Expanding on the existing bioreactor CFD literature (typically focused on the hydrodynamics of bubbly flows), our simulations include interphase mass transfer of oxygen and a simple phenomenological reaction representing the uptake and consumption of dissolved oxygen by submerged cells. The simulations reproduce the expected flow profiles, with net upward flow in the center of column and downward flow near the wall. At high simulated oxygen uptake rates (OUR), oxygen-depleted regions can be observed in the reactor. By increasing the gas flow to enhance mixing and eliminate depleted areas, a maximum oxygen transfer (OTR) rate is obtained as a function of superficial velocity. These insights regarding minimum superficial velocity and maximum reactor size are incorporated into NREL's larger techno-economic models to supplement standard reactor design equations.
Download or read book Oxygen Mass Transfer and Oil Hydrocarbon Biotreatment Characteristics of a Novel Airlift Immobilized Bioreactor System written by Babak Jajuee and published by . This book was released on 2006 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bioreactor Engineering Research and Industrial Applications II written by Jie Bao and published by Springer. This book was released on 2019-03-30 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book review series presents current trends in modern biotechnology. The aim is to cover all aspects of this interdisciplinary technology where knowledge, methods and expertise are required from chemistry, biochemistry, microbiology, genetics, chemical engineering and computer science. Volumes are organized topically and provide a comprehensive discussion of developments in the respective field over the past 3-5 years. The series also discusses new discoveries and applications. Special volumes are dedicated to selected topics which focus on new biotechnological products and new processes for their synthesis and purification. In general, special volumes are edited by well-known guest editors. The series editor and publisher will however always be pleased to receive suggestions and supplementary information. Manuscripts are accepted in English.
