Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 74 for “"electrodialysis"”.
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Thermodynamic analysis of electrodialysis
… thesis, we present a thermodynamic analysis of electrodialysis (ED). ED is a desalination technology with many applications, and has shown promise in desalinating brackish water and in concentrating high-salinity brines. In order to better understand how the energetic performance of this …
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Electrodialysis of acetic acid fermentation broths
Electrodialysis (ED) was studied as a method to recover and purify acetate from model solutions and fermentation broths such as vinegar and calcium magnesium acetate (CMA). An initial evaluation of the ED stack with model sodium chloride solutions revealed that increasing the flow rate increased …
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Selective Ion Separations Using Shock Electrodialysis
… emerging electrokinetic approach known as “shock electrodialysis” (shock ED) and its use in selective ion separations. Although the principles of deionization by shock ED have been established in previous work, the possibility of selective ion separations has only recently been discovered, and …
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Continuous ion-selective separation by shock electrodialysis
… better technological fit. In this thesis, shock electrodialysis (SED) is demonstrated to achieve highly selective continuous removal of magnesium ions from an aqueous mixture of NaCl and MgCl₂.
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The effect of electrodialysis on several Kaolins
… and electrodialyzed in order to determine if electrodialysis had any effect on the crystal structure of the Kaolin. Quantitative spectrographic analyses were made to determine what elements and how much of each element was removed by dialysis. The same process was run and tests were made on …
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Recovery of lactic acid from fermentation broth by electrodialysis
… was to study the feasibility of utilizing electrodialysis (ED) to recover lactic acid from fermentation broths to enhance the productivity of the fermentation and reduce downstream processing costs.
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Treating Brackish Groundwater for Irrigation with Selective Electrodialysis & Nanofiltration
… In this study, two technologies, selective electrodialysis (SED) and nanofiltration (NF), are evaluated to treat the brackish groundwater as an alternative to RO. Unlike RO, both SED and NF can remove monovalent ions from the brackish groundwater feed stream while retaining the divalent …
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The regeneration of mixed ion exchange resins by electrodialysis
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1952.
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Cost optimization of a solar-powered electrodialysis desalination system
… thesis, I present a solar photovoltaic-powered electrodialysis reversal (PV-EDR) model, and use it to design a steady voltage and pumping EDR system composed of current off-the- shelf parts for Chelluru, a village near Hyderabad, India. I investigate flexible operation and load sizing as design …
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Simple, sustainable, water straight from the sun - batteryless electrodialysis desalination
… operating costs, complexity and maintenance. Electrodialysis is a flexible technology with significant energy and water efficiency in comparison to other thermal and membrane processes and thus provides significant reduction in solar array capacity; however, it has not been exhibited off-grid …
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Monovalent selective electrodialysis : optimizing energetics for desalination and mineral recovery
Monovalent selective electrodialysis (MSED) is a variant of conventional electrodialysis (ED) that employs selective ion exchange membranes to induce preferential removal of monovalent ions relative to divalent ions. This process can be beneficial when the divalent rich stream has potential …
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Shock electrodialysis for water purification and electrostatic correlations in electrolytes
… little infrastructure. In this thesis, shock electrodialysis is proposed and examined for its potential to effectively provide a solution for use with brackish and contaminated water. Shock electrodialysis is in many ways related to electrodialysis, but it is based on the emerging science of …
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Cost-optimal design of a household batch electrodialysis desalination device
… design of a household point-of-use batch electrodialysis (ED) system to provide a cost-effective replacement for existing reverse osmosis (RO) devices, for brackish water desalination of Indian groundwater, at lower energy consumption and higher recovery: 80-90% vs 25-40%. Target …
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Performance and economics of monovalent selective electrodialysis desalination for irrigation
… the addition of fertilizer. Monovalent selective electrodialysis (MSED) demonstrates greater potential to align with the needs of the agriculture sector. MSED is a variant of conventional electrodialysis (ED). MSED preferentially removes monovalent ions relative to multi-valent ions, defined as …
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Feasibility and Design of Solar-Powered Electrodialysis Systems for Agriculture Applications
This paper presents photovoltaic-powered electrodialysis reversal (PV-EDR) as a promising desalination technology for agricultural applications in the Middle East and North Africa (MENA). Water scarcity in MENA has led to reliance on brackish water for irrigation of crops. Irrigating crops with …
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Novel Separation Methods using Electrodialysis/Electrodeionization for Product Recovery and Power Generation
… used for demineralization and desalination, electrodialysis and its counterparts have expanded to assist in product purification, waste and hazard removal, and power generation. This research focused on the development of high purity organic acids purification with low power requirements. …
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Development of a reverse osmosis/electrodialysis process to concentrate natural organic matter
… method using a sequential reverse osmosis(RO)/electrodialysis(ED) treatment system that can be used for toxicity studies. This work focuses on data comparison from two methods of NOM concentration and two sources of sample water, Newmark tap water and a filter effluent from a …
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Optimizing a hybrid reverse osmosis/electrodialysis system for natural organic matter concentration
Reverse osmosis (RO) and electrodialysis (ED) were examined to determine an optimum way to concentrate natural organic matter (NOM) for chemical and biological characterization of disinfection by-products (DBPs). RO is an effective way to concentrate NOM. However, it also concentrates inorganic …
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Justification of village scale photovoltaic powered electrodialysis desalination systems for rural India
This thesis justifies photovoltaic (PV)-powered electrodialysis (ED) as an energy and cost-effective means of desalinating groundwater in rural India and presents the design requirements for a village-level system. Saline groundwater, which underlies 60% of India, can negatively impact health as …
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An assessment of reverse electrodialysis for application to small-scale aquatic systems
Reverse electrodialysis (RED) is a means by which to produce electrical power through the flow of Na+ and Cl- ions from seawater to fresh water across ion selective membranes. While current research has largely focused on utilizing RED for large-scale commercial power, this thesis explores the …
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