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Membrane Technology and Applications Internationally acknowledged text on separation membrane technology, presenting current theory and practice, plus manufacturing and applications The 4th Edition of Membrane Technology and Applications presents an authoritative, up-to-date overview of separation membranes, their theoretical underpinnings, manufacture, and use, beginning with a series of general chapters on membrane preparation, transport theory, and concentration polarization, then surveying the major areas of membrane application in separate chapters. Written in a readily accessible style, each chapter offers a thorough treatment of its subject, from historical and theoretical backgrounds through to current and potential applications. Topics include reverse osmosis, ultrafiltration, microfiltration, gas separation, pervaporation, electrodialysis, coupled and facilitated transport, and medical applications of membranes. This new edition has been comprehensively updated, with substantial new material, figures, and references throughout to reflect the latest developments in the field. Major changes include: A new chapter on transport mechanisms in finely microporous membranes, with focus on gas transport A new chapter on membrane contactors A substantially expanded section on hyperfiltration applications, including pharmaceutical applications, in the reverse osmosis chapter Expanded treatment of membrane bioreactors, plus a new section on biotechnology applications, in the ultrafiltration chapter A new section in the gas separation chapter devoted to carbon dioxide capture from industrial process emissions, including power plant emissions Research areas that the author would work on if he were, once again, a 21-year-old graduate student. Written by a leading expert with 50 years of experience, Membrane Technology and Applications provides balanced coverage of all aspects of the field, and is essential reading for all membrane enthusiasts, from neophyte graduate student to academic researcher to seasoned industry professional.
1.1 Background Water–stress is becoming one of the greatest challenges of the 21st century. The fast growth of population, tourism, and agriculture development in the world has resulted in a great demand for access to clean water [3]. Most of the developing regions of the world are still suffering from water scarcity. The problem of water shortage is being extended to other nations of the world. The lack of access to safe drinking water poses significant problems globally. Fresh water is not available for around 1.2 billion people worldwide while around 2.6 billion may obtain limited or unsafe water. This may be the result of climate change with extreme industrial and agriculture activities. It was assumed that by 2025, two thirds of people around the world will be living in water-stressed countries [4]. Thus, the requirement of potable water to sustain human life in the world will rise from 4500 billion m3 to 6900 billion m3 by 2030 which goes beyond the accessible water resources [5]. Therefore, we need to meet and sustain these growing demands as soon as possible. A promising technology to meet the demand of fresh water is water desalination using membrane technology. A recent study reported that the daily production of desalinated water was up to 25 million m3 globally [6, 7]. Water desalination was developed to remove salts and other contaminants from seawater, brackish water and produced water to acquire drinking water [8]. Singh et al. [9] stated that since 1995 membrane filtration has been effective in removing microbiological species such as Giardia and Cryptosporidium. It has also been reported that membrane-based desalination provides 63.7% drinking water while thermal desalination method provides almost half of it, about 34.2% globally [10]. For instance, micro-filtration and ultrafiltration membranes can reject particles much smaller than 1 micron such as proteins, oil droplets, bacteria, etc. In contrast, Nano filtration and reverse osmosis can separate particles in the range of 1/100th to 1/1000th of a micrometre, such as aqueous salts, sugars, and amino acids [11]. Among the membrane desalination technologies, reverse osmosis (RO) is being actively used in most countries due to their significant properties and ease of obtaining drinking water.
This book addresses principles and practical applications of membrane distillation and osmotic distillation, separation technologies which are gaining increasing attention due to their advantages over conventional concentration processes. • Addresses membrane and osmotic distillation, two closely related and novel processes that offer several advantages over conventional concentration processes • Has a widespread impact and application of the technology in industries such as food, environment, and nuclear clean-up / containment • Covers theoretical aspects of both processes, the properties of hydrophobic membranes, process economics, integrated processes and future prospects. • Caters the presentation caters for the diversity of readership with respect to links with membrane technologies.