Removal of Volatile to Semi-volatile Organic Contaminants from Water Using Hollow Fiber Membrane Contactors and Catalytic Destruction of the Contaminants in the Gas Phase PDF Download
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Author: Shamsul Abedin Tarafder
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Author: Shamsul Abedin Tarafder
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Author: Jeffrey L. Fleming
Publisher: Taylor & Francis
ISBN: 9780815511892
Category : Science
Languages : en
Pages : 120
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Book Description
"From the Introduction: " The purpose of this guide is to aid in determining whether a particular volatilization technology can successfully remove organic contaminants from water. It describes the performance evaluation of common volatilization technologies and provides an approach for selecting the appropriate technology for a given situation. Data necessary for the evaluation are described and, whenever possible, background data are given for selected hazardous organics. In addition to being useful for equipment selection, it can be used as an educational tool for background data on volatilization technologies or as a decision-making tool for purchasing a mobile technology. The impetus for developing a guide stems from involvement of the Hazardous Waste Engineering Researching Laboratory's Releases Control Branch in technical assistance activities that require assessment of the feasibility and cost of various treatment options. It was recognized that EPA On-Scene Coordinators (OSC) and their technical support personnel are often faced with changing or uncertain conditions that could affect the cost and feasibility of removing volatile substances from water. As conditions change or as some of the uncertainties are resolved, the OSC's technical support personnel are called upon to revise their estimates accordingly. It was recognized that the OSC and their technical support staffs did not have a concise guide on the subject of volatilization technologies and their application to spill cleanup operations. People with some technical training in chemistry and thermodynamics, but limited experience in participating or coordinating cleanup activities at uncontrolled hazardouswaste sites will find the guide useful. (A review of volatilization is provided for thos
Author: Anil K. Pabby
Publisher: CRC Press
ISBN: 0429677456
Category : Science
Languages : en
Pages : 325
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Book Description
This book on hollow fiber contractors presents an up-to-date compilation of the latest developments and milestones in this membrane technology. Hollow Fiber Membrane Contactors: Module Fabrication, Design and Operation, and Potential Applications provides a comprehensive discussion of hollow fiber membrane applications (including a few case studies) in biotechnology, chemical, food, and nuclear engineering. The chapters in this book have been classified using the following, based on different ways of contacting fluids with each other: Gas-liquid contacting; Liquid-liquid contacting; Supported liquid membrane; Supported gas membrane; Fluid-fluid contacting. Other features include: Discusses using non-dispersive solvent extraction, hollow fiber strip dispersion, hollow fiber supported liquid membranes and role of process intensification in integrated use of these processes Provides technical and economic perspectives with several case studies related to specific scenarios Demonstrates module fabrication, design, operation and maintenance of hollow fiber contactors for different applications and performance Presents discussion on newer concepts like membrane emulsification, membrane nanoprecipitation, membrane crystallization and membrane condenser Special focus on emerging areas such as the use of hollow fiber contactor in back end of nuclear fuel cycle, membrane distillation, dehumidification of air and gas absorption and stripping Discusses theoretical analysis including computational modeling of different hollow fiber membrane processes, and presents emphasis on newly developed area of hollow fiber membrane based analytical techniques Presents discussion on upcoming area dealing with hollow fiber contactors-based technology in fermentation and enzymatic transformation and in chiral separations This book is equally suited for newcomers to the field, as well as for engineers and scientists that have basic knowledge in this field but are interested in obtaining more information about specific future applications.
Author: Enrico Drioli
Publisher: Elsevier
ISBN: 0080457010
Category : Technology & Engineering
Languages : en
Pages : 517
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Book Description
Membrane Contactors: Fundamentals, Applications and Potentialities, Volume 11 covers new operations that could be efficiently used to improve the performance of a variety of industrial production cycles in applications ranging from biotechnology to agrofood. This book focuses on the basic "principles of work": required membrane materials and properties; major operating parameters; the importance of module configuration and design and; the performance of membrane contactors in specific processes. The authors' dynamic approach to this subject makes Membrane Contactors: Fundamentals, Applications and Potentialities, Volume 11 the most comprehensive book currently available on all aspects related to the 'membrane contactor world.* Describes new unit operations in process engineering* Covers a wide variety of industrial applications, from biotechnology to agrofood* Applicable to process intensification and sustainable growth strategies
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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This report describes feasibility tests of a two-step strategy for air pollution control applicable to exhaust air contaminated with volatile organic compounds (VOCs) from painting aircraft. In the first step of the two-step strategy, the VOC-contaminated exhaust air passes over coated, polypropylene, hollow-fiber membranes while an involatile liquid (silicone oil, mineral oil, decanol, octanol) is pumped counter-current through the filters. The organic liquid captures the VOCs, and their concentration in the circulating liquid increases whenever exhaust air circulates. In the second step, the circulating organic loop passes through a second set of hollow-fiber membranes that support a culture of microorganisms, which remove and metabolize the VOCs, on their exterior surfaces. The concentration of VOCs in the circulating loop oscillates as the painting process starts and stops because VOC capture by the liquid is a fast process whereas removal and metabolization by microorganisms is a slow process. Despite constraints caused by limited availability of commercial membrane packages, adequate rates of removal and transport into and out of circulating octanol were shown to be adequate to support the proposed technology. Biodegradation was also qualitatively validated, although each of the organisms used in these tests selectively metabolized specific classes of solvents; however, other cultures or sequential treatment stages are expected to provide satisfactory removal. Scale-up revealed material incompatibility of the membranes and adhesives with octanol. Silicone oils and vegetable oils were briefly tested as the circulating organic liquid at the end of the project. Pressure drop also remains as an engineering challenge unless ventilation exhaust rates are decreased.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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In situ vacuum extraction, air or steam sparging, and vitrification are widely used methods of remediating soil contaminated with volatile organic compounds (VOCs). All of these processes produce a VOC-laden air stream from which the VOC must be removed before the air can be discharged or recycled to the generating process. Treatment of these off-gases is often a major portion of the cost of the remediation project. Carbon adsorption and catalytic incineration, the most common methods of treating these gas streams, suffer from significant drawbacks. This report covers the first phase of a two-phase project. The first phase involved the laboratory demonstration of the water separation section of the unit, the production and demonstration of new membrane modules to improve the separation, the design studies required for the demonstration system, and initial contacts with potential field sites. In the second phase, the demonstration system will be built and, after a short laboratory evaluation, will be tested at two field sites.
Author: Steven Oluić
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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During the past decade, interest in gas-phase pollution control has greatly increased, arising from a greater respect for the environment, more attention to the impact of environmental pollution, and a larger body of regulations. A promising set of methods now being applied to gas-phase pollution abatement is non-thermal plasma (NTP) technologies. These plasmas are useful for generating highly reactive species (e.g., free radicals) which readily decompose entrained pollutants in atmospheric-pressure gas streams. Such plasmas can generate both oxidative and reductive radicals showing promise for treating a wide variety of pollutants, in some cases simultaneously decomposing multiple species. In this chapter, we will discuss the removal of gas-phase volatile organic compounds (VOCs) by two types of electric-discharge-driven NTPs: dielectric-barrier (silent) discharges and pulsed corona discharges. These two types of discharges are easily operated at atmospheric pressure or above, thereby having a high process throughput compared to low-pressure NTPs.
Author: W. Jang
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 51
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Author: Steven Oluić
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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