Mathematical Modeling Of Biofilm Thickness In A Membrane Aerated Biofilm Reactor
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Mathematical Modeling Of Biofilm Thickness In A Membrane Aerated Biofilm Reactor
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Author : Woochul Jung
language : en
Publisher:
Release Date : 2010
Mathematical Modeling Of Biofilm Thickness In A Membrane Aerated Biofilm Reactor written by Woochul Jung and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Comparison Between Thermophilic And Mesophilic Membrane Aerated Biofilm Reactors A Modeling Study
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Author : Duowei Lu
language : en
Publisher:
Release Date : 2018
Comparison Between Thermophilic And Mesophilic Membrane Aerated Biofilm Reactors A Modeling Study written by Duowei Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Membrane aerated biofilm reactor (MABR), as a novel biological waste treatment technology, has received much attention in recent years, due to its advantages, as compared to conventional biofilm. Considerable amount of research and development of MABR technology were conducted in lab-scale, pilot-scale studies and even full-scale applications for various types of waste treatment and air pollution control. Though many researches have mentioned that operation factors would result in different system performance, few researches are focused on temperature changing impacts. While thermophilic aerated biological treatment already became a hot issue for waste water treatment. Thus, combined with thermophilic aerated biological treatment, the concept of thermophilic membrane-aerated biofilm reactor (ThMABR) is proposed in this research. This concept has a great potential to develop a new type of ultracompact, highly efficient bioreactor for high strength wastewater. In order to prove the high temperature has positive effect on MABR system, a mathematic modeling was established. Mathematical modeling was conducted to investigate the impact of temperature (mesophilic vs. thermophilic) on oxygen and substrate concentration profiles, membrane-biofilm interfacial oxygen concentration, oxygen penetration distance, and oxygen and substrate fluxes into biofilms. In the first part of this thesis, it focuses on a state-of-the-art literature review (2007-present) on the research progress and technology development of the MABR technology. The biological and membrane performances of MABRs for chemical oxygen demand (COD) and nitrogen removal in wastewaters, air pollution control, and modeling studies are systematically reviewed and discussed. However, few articles mentioned the temperature changing effect on MABR system. So in the second part, the concept of thermophilic membrane-aerated biofilm reactor (ThMABR) is proposed. This concept combines the advantages and overcomes the disadvantages of conventional MABR and thermophilic aerobic biological treatment, and has a great potential to develop a new type of ultra-compact, highly efficient bioreactor for high strength wastewater and waste gas treatments. Mathematical modeling was conducted to investigate the impact of temperature (mesophilic vs. thermophilic) on oxygen and substrate concentration profiles, membrane-biofilm interfacial oxygen concentration, oxygen penetration distance, and oxygen and substrate fluxes into biofilms. The general trend of oxygen transfer and substrate flux into biofilm between ThMABR and MMABR was verified by the experimental results in the literature. The results from modeling studies indicate that the ThMABR has significant advantages over the conventional mesophilic MABR in terms of improved oxygen and pollutant flux into biofilms and biodegradation rates and an optimal biofilm thickness exists for maximum oxygen and substrate fluxes into biofilm.
Modeling And Experimental Analyses Of Membrane Aerated Biofilms
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Author : John William Shanahan
language : en
Publisher:
Release Date : 2007
Modeling And Experimental Analyses Of Membrane Aerated Biofilms written by John William Shanahan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Mathematical Modeling Of Biofilms
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Author : IWA Task Group on Biofilm Modeling
language : en
Publisher: IWA Publishing
Release Date : 2006-04-30
Mathematical Modeling Of Biofilms written by IWA Task Group on Biofilm Modeling and has been published by IWA Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-30 with Science categories.
Over 90% of bacterial biomass exists in the form of biofilms. The ability of bacteria to attach to surfaces and to form biofilms often is an important competitive advantage for them over bacteria growing in suspension. Some biofilms are "good" in natural and engineered systems; they are responsible for nutrient cycling in nature and are used to purify waters in engineering processes. Other biofilms are "bad" when they cause fouling and infections of humans and plants. Whether we want to promote good biofilms or eliminate bad biofilms, we need to understand how they work and what works to control them. Mathematical Modeling of Biofilms provides guidelines for the selection and use of mathematical models of biofilms. The whole range of existing models - from simple analytical expressions to complex numerical models - is covered. The application of the models for the solution of typical problems is demonstrated, and the performance of the models is tested in comparative studies. With the dramatic evolution of the computational capacity still going on, modeling tools for research and practice will become more and more significant in the next few years. This report provides the foundation to understand the models and to select the most appropriate one for a given use. Mathematical Modeling of Biofilms gives a state-of-the-art overview that is especially valuable for educating students, new biofilm researchers, and design engineers. Through a series of three benchmark problems, the report demonstrates how to use the different models and indicates when simple or highly complex models are most appropriate. This is the first report to give a quantitative comparison of existing biofilm models. The report supports model-based design of biofilm reactors. The report can be used as basis for teaching biofilm-system modeling. The report provides the foundation for researchers seeking to use biofilm modeling or to develop new biofilm models. Scientific and Technical Report No.18
Characterization Of Membrane Aerated Biofilms For Wastewater Treatment
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Author : Alina Christianson Cole
language : en
Publisher:
Release Date : 2005
Characterization Of Membrane Aerated Biofilms For Wastewater Treatment written by Alina Christianson Cole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Basic Equations Of The Mass Transport Through A Membrane Layer
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Author : Endre Nagy
language : en
Publisher: Elsevier
Release Date : 2011-12-07
Basic Equations Of The Mass Transport Through A Membrane Layer written by Endre Nagy and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-12-07 with Technology & Engineering categories.
With a detailed analysis of the mass transport through membrane layers and its effect on different separation processes, this book provides a comprehensive look at the theoretical and practical aspects of membrane transport properties and functions. Basic equations for every membrane are provided to predict the mass transfer rate, the concentration distribution, the convective velocity, the separation efficiency, and the effect of chemical or biochemical reaction taking into account the heterogeneity of the membrane layer to help better understand the mechanisms of the separation processes. The reader will be able to describe membrane separation processes and the membrane reactors as well as choose the most suitable membrane structure for separation and for membrane reactor. Containing detailed discussion of the latest results in transport processes and separation processes, this book is essential for chemistry students and practitioners of chemical engineering and process engineering. Detailed survey of the theoretical and practical aspects of every membrane process with specific equations Practical examples discussed in detail with clear steps Will assist in planning and preparation of more efficient membrane structure separation
Biofilms In Wastewater Treatment
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Author : Stefan Wuertz
language : en
Publisher: IWA Publishing
Release Date : 2003-04-30
Biofilms In Wastewater Treatment written by Stefan Wuertz and has been published by IWA Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-04-30 with Science categories.
The central theme of the book is the flow of information from experimental approaches in biofilm research to simulation and modeling of complex wastewater systems. Probably the greatest challenge in wastewater research lies in using the methods and the results obtained in one scientific discipline to design intelligent experiments in other disciplines, and eventually to improve the knowledge base the practitioner needs to run wastewater treatment plants. The purpose of Biofilms in Wastewater Treatment is to provide engineers with the knowledge needed to apply the new insights gained by researchers. The authors provide an authoritative insight into the function of biofilms on a technical and on a lab-scale, cover some of the exciting new basic microbiological and wastewater engineering research involving molecular biology techniques and microscopy, and discuss recent attempts to predict the development of biofilms. This book is divided into 3 sections: Modeling and Simulation; Architecture, Population Structure and Function; and From Fundamentals to Practical Application, which all start with a scientific question. Individual chapters attempt to answer the question and present different angles of looking at problems. In addition there is an extensive glossary to familiarize the non-expert with unfamiliar terminology used by microbiologists and computational scientists. The colour plate section of this book can be downloaded by clicking here. (PDF Format 1 MB)
Productive Biofilms
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Author : Kai Muffler
language : en
Publisher: Springer
Release Date : 2014-10-15
Productive Biofilms written by Kai Muffler and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-15 with Science categories.
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.
Mathematical Modelling Of Multispecies Biofilms For Wastewater Treatment
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Author : Maria Rosaria Mattei
language : en
Publisher:
Release Date : 2014
Mathematical Modelling Of Multispecies Biofilms For Wastewater Treatment written by Maria Rosaria Mattei and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
This dissertation relates to the applications of a one-dimensional mathematical model for multispecies biofilm formation and growth. The model consists of a system of nonlinear hyperbolic partial differential equations, describing the growth of microbial species in biofilms, and a system of semilinear parabolic partial differential equations, which governs substrate diffusion from the surrounding aqueous phase into the biofilm. Overall, this leads to a free boundary value problem, essentially hyperbolic. In a first study, the analysis and simulations of the initial phase of biofilm growth have been addressed. The resulting mathematical problem has been discussed by using the method of characteristics and the fixed-point theorem has been used to obtain existence, uniqueness and properties of solutions. A second aspect of the thesis deals with the analysis and prediction of population dynamics in multispecies biofilms for wastewater treatment. The model has been applied to simulate the bacterial competition and to evaluate the influence of substrate diffusion on microbial stratification for a nitrifying multispecies biofilm including Anammox bacteria and a sulfate-reducing biofilm. In both cases, the method of characteristics has been used for numerical purposes and the mass conservation equation plays a crucial role in checking the accuracy of simulations. The simulation results reveal that the model is able to evaluate properly the effects that boundary conditions exert on bacterial competition. Finally, the biofilm model has been extended to include the colonization phenomenon. The new model is able to take into account the invasion of new species diffusing from bulk liquid to biofilm, still based on a set of nonlinear hyperbolic partial differential equations for what concerns growth process. Indeed, the biological invasion process of new species into the biofilm has been modeled by a system of nonlinear parabolic partial differential equations. The invasion model has been successfully applied to simulate the invasion of heterotrophic bacteria in a constituted autotrophic biofilm and viceversa.
Basic Equations Of Mass Transport Through A Membrane Layer
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Author : Endre Nagy
language : en
Publisher: Elsevier
Release Date : 2018-11-05
Basic Equations Of Mass Transport Through A Membrane Layer written by Endre Nagy and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-05 with Technology & Engineering categories.
Basic Equations of Mass Transport Through a Membrane Layer, Second Edition, has been fully updated to deliver the latest research in the field. This volume covers the essentials of compound separation, product removal, concentration, and production in the chemical, biochemical, pharmaceutical, and food industries. It outlines the various membrane processes and their applications, offering a detailed mathematical description of mass transport and defining basic mass transport and concentration distribution expressions. Additionally, this book discusses the process parameters and application of the expressions developed for a variety of industrial applications. Comprehensive explanations of convective/diffusive mass transport are provided, both with and without polarization layers, that help predict and process performance and facilitate improvements to operation conditions and efficiency. Basic Equations of Mass Transport Through a Membrane Layer is an ideal resource for engineers and technologists in the chemical, biochemical, and pharmaceutical industries, as well as researchers, professors, and students in these areas at both an undergraduate and graduate level. Cites and analyzes mass transport equations developed for different membrane processes. Examines the effect of biochemical/chemical reactions in the presence of convective and diffusive flows in plane and cylindrical spaces. Defines the mass transfer rate for first- and zero-order reactions and analytical approaches are given for other-order reactions in closed mathematical forms. Analyzes the simultaneous convective and diffusive transports with same or different directions.