Osmotically Driven Membrane Processes provides an overview of membrane systems and separation processes, recent trends in membranes and membrane processes, and advancements in osmotically driven membrane systems. It focuses on recent advances in monitoring and controlling wastewater using membrane technologies. It explains and clarifies important research studies as well as discusses advancements in the field of organic-inorganic pollution.
Osmotically driven membrane processes (ODMPs) including forward osmosis (FO) and pressure-retarded osmosis (PRO) have attracted increasing attention in fields such as water treatment, desalination, power generation, and life science. In contrast to pressure-driven membrane processes, e.g., reverse osmosis, which typically employs applied high pressure as driving force, ODMPs take advantages of naturally generated osmotic pressure as the sole source of driving force. In light of this, ODMPs possess many advantages over pressure-driven membrane processes. The advantages include low energy consumption, ease of equipment maintenance, low capital investment, high salt rejection, and high water flux. In the past decade, over 300 academic papers on ODMPs have been published in a variety of application fields. The number of such publications is still rapidly growing. The ODMPs' approach, fabrications, recent development and applications in wastewater treatment, power generation, seawater desalination, and gas absorption are presented in this book.
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.
Osmotic energy can be effectively harvested through pressure retarded osmosis (PRO) which is the most widely investigated technology due to its greater efficiency and higher power density output and effective membranes are the heart of the PRO technology. This book will cover a broad range of topics, including PRO membranes, fouling, module fabrication, process design, process operation and maintenance. It summarizes the progress in PRO researches in the last decade, and points out the directions for future R&D and commercialization of PRO. It will be of great interest to membrane researcher, company and operators to understand and get insights into the state-of-the-art PRO technologies.
The book examines the possibility of integrating different membrane unit operations (microfiltration, ultrafiltration, nanofiltration, reverse osmosis, electrodialysis and gas separation) in the same industrial cycle or in combination with conventional separation systems. It gives careful analysis of the technical aspects, and the possible fields of industrial development. The book reviews many original solutions in water desalination, agro-food productions and wastewater treatments, highlighting the advantages achievable in terms of product quality, compactness, rationalization and optimization of productive cycles, reduction of environmental impact and energy saving. Also included are examples of membrane reactors and their integration with a fuel cell; polymeric membranes in the integrated gasification combined cycle power plants; integrating a membrane reformer into a solar system; and potential application of membrane integrated systems in the fusion reactor fuel cycle. With detailed analysis and broad coverage, the book is divided into two sections: Bio-applications and Inorganic Applications.
Membrane Processes is a component of Encyclopedia of Water Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. These volumes discuss matters of great relevance to our world on desalination which is a critically important as clearly the only possible means of producing fresh water from the sea for many parts of the world. The two volumes present state-of-the art subject matter of various aspects of Membrane Processes such as: History And Current Status Of Membrane Desalination Processes; Membrane Science And Reclamation; Membrane Characterization; Principles And Practices Of Reverse Osmosis; Reverse Osmosis: Introduction; Hollow-Fiber Membranes; Preparation And Characterization Of Ionexchange Membranes; Preparation And Characterization Of Micro- And Ultrafiltration Membranes; Membrane Distillation; Desalination By Membrane Distillation; Pervaporation;Dialysis And Diffusion Dialysis; Donnan Dialysis; Modeling And Calculation Of Pressure-Driven Membrane Processes; Survey Of Theoretical Approaches To Modeling; Pressure-Driven Membrane. Processes(Submodels For Transport In Phases); Reverse Osmosis Process And System Design; Practical Aspects Of Large-Scale Reverse Osmosis Applications; Health, Safety And Environmental Considerations; Membrane Separation Technologies; Concentration Of Liquid Foods; Mass Transfer Operation–Membrane Separations; Mass Transfer Operations: Hybrid Membrane Processes; Recent Advances In Membrane Science And Technology In Seawater Desalination – With Technology Development In The Middle East And Singapore. These volumes are aimed at the following five major target audiences: University and College Students Educators, Professional Practitioners, Research Personnel and Policy and Decision Makers
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Fouling is a phenomenon that occurs in all membrane processes. It is a complex problem, which limits the full operation of this technology. Fouling in pressure-driven membranes (PDMs) has been studied extensively, and the occurrence is well understood in that methods of mitigation have been proposed; however, limitations still occur for their full implementation. The use of osmotically driven membranes (ODMs) for water treatment is an emerging technology, which has shown some advantages such as low hydraulic pressure operation, high solute rejection and high recovery over PDMs. However, like in PDMs, fouling still presents a challenge. This chapter is aimed at evaluating the impact of fouling on the ODM performance, exploring the factors and mechanisms governing the fouling behaviour, developing approaches for mitigating fouling, elucidating the effect of membrane fouling and providing mitigation strategies as well as the causes of fouling in ODMs.
Membrane-Based Salinity Gradient Processes for Water Treatment and Power Generation focuses on the various types of membrane- based salinity gradient processes that can be applied for desalination. Topics cover salinity gradient processes for desalination, such as Forward Osmosis (FO) and Pressure Retarded Osmosis (PRO), with chapters selected exclusively from a number of world-leading experts in various disciplines and from different continents. Sections include discussions on the theoretical and fundamental approaches to salinity gradient processes, various types of membrane materials and development, i.e., flat sheet and hollow fiber, various salinity water sources for an economically feasible process, and large-scale applications. Finally, the book focuses on economically feasible process optimization when both operational and capital costs are considered. Features specific details on salinity gradient techniques for various desalination applications of industrial and academic interest Contains unique discussions on membrane development and process optimization that normally only appear briefly in research articles Includes examples of internationally best practices for the evaluation of several system parameters, including thermodynamic optimization, high power density membrane development, and more Discusses large-scale applications and provides examples of such implementations, such as Statkraft, Japanese Megaton, and Korean GMVP
