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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 26 for “"Membrane Distillation (MD)"”.
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Membrane distillation in dairy processing
Membrane distillation (MD) is a novel membrane process for industry which promises to be a low energy and/or low cost alternative to established separation technologies. The overall objective of this research was the theoretical and experimental investigation of direct contact MD (DCMD) for major …
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Nanophotonics-enabled Solar Membrane Distillation for Off-grid Water Purification
… lower-energy approaches are equally critical. Membrane distillation (MD) has shown potential due to its low operating temperature and pressure requirements, but the requirement of heating the input water makes it energy intensive. Here we demonstrate nanophotonics-enabled solar membrane …
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Advancing hydrophobic desalination membranes using initiated chemical vapor deposition (iCVD) v/
Hydrophobic membranes are the central component of membrane distillation (MD) desalination systems. Optimizing their design is crucial for efficient desalination. There are many requirements on MD membranes. These include high liquid entry pressure (LEP) and high permeability to water vapor. There …
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Hollow fiber membrane-based air gap membrane distillation
Membrane Distillation (MD) is a thermally-driven separation process. In this research, desalination of 1 % NaCl solution is achieved by one type of MD namely, Air Gap Membrane Distillation (AGMD). The characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine …
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Causes and analysis of failures in in-situ microscopy observation for the characterization of scaling in membrane distillation membranes
In membrane technology at large, fouling limits membrane performance and membrane lifespan. In the case of reverse osmosis membrane distillation (MD) involving fluid mixtures of inorganic elements, inorganic foulants build up on membrane surfaces, and reduce the flux of fluids across a membrane. …
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Membrane Distillation for Leachate Treatment with Fenton Pre-Coagulation Treatment Process
… treatments is required. In this study, membrane distillation (MD) has been used along with Fenton treatment process for pre-coagulation to achieve an effective removal of contaminants. MD is a technology derived with vapor pressure difference across the hydrophobic membrane which traps …
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Numerical and experimental investigation of membrane distillation flux and energy efficiency
… technological innovations. This thesis considers membrane distillation (MD), one of the relatively less studied desalination technologies. The energy efficiency of MD in the sweeping gas (SGMD) configuration along with a multi-tray bubble column dehumidifer is analyzed and compared to other …
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Thermodynamic design and fouling of membrane distillation systems
… fill the void. One such developing technology, membrane distillation (MD), has experienced keen academic interest and an increase in start-up businesses in the past decade. MD has expanded into a niche of small scale thermal desalination using solar and waste heat resources, due to its fouling …
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Conversion of Saline Water to Fresh Water Using Air Gap Membrane Distillation (AGMD)
Membrane distillation (MD) is a combination of evaporation of water from saline solution and diffusion of vapour through a hydrophobic membrane. The driving force is the vapour pressure difference created by temperature difference across the membrane. With development of hydrophobic membranes at a …
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Membrane distillation for high salinity desalination
Membrane distillation systems typically have low energy efficiency. Multistage membrane distillation (MD) systems can have significantly higher efficiencies than their single stage counterparts. However, multistage MD system design has received limited attention. In this work, the performance of a …
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Investigations on Solar Powered Direct Contact Membrane Distillation
… and electricity based desalination. Multi-effect Distillation (MED), Multi-Stage Flashing (MSF), Membrane Distillation (MD) fall under former and Reverse Osmosis (RO), Electro-Dialysis (ED) fall under later. MD offers an attractive solution for seawater as well as brackish water distillation. It …
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Assessment of performance and efficiency of membrane distillation for treatment of impaired water and brine with high scaling potential
Water recovery is limited in pressure-driven membrane processes such as reverse osmosis (RO) and nanofiltration (NF) due to increase in scaling risk and osmotic pressure of the feed water with concentration. Membrane distillation (MD) is an emerging thermally-driven membrane desalination processes …
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Development of energy efficient membrane distillation systems
Membrane distillation (MD) has shown potential as a means of desalination and water purification. As a thermally driven membrane technology which runs at relatively low pressure, which can withstand high salinity feed streams, and which is potentially more resistant to fouling, MD could be used for …
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Development of electrically conductive membrane distillation for zero liquid discharge by mitigating inorganic scaling
Membrane distillation (MD) is a promising technique in water treatment, known for perfect removal efficiency, low energy use, and low sensitivity to feed salinity. However, high recovery rates lead to challenges like foulant concentration and scaling. Electrically conductive membrane (ECM) …
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Development of seawater electrolysis with low-cost membranes for sustainable cement production and pretreatment
Membrane electrolysis is an electrochemical process that uses ion-exchange membranes (IEMs) to selectively migrate ions and recover valuable resources from seawater. Despite its advantages, its application in large-scale industrial processes like cement production has been limited by the high costs …
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Enhanced membrane distillation : analytical and deionization applications
Membrane distillation (MD) is a newer technology that is being investigated for applications such as seawater desalination and concentration of fruit and sucrose solutions. The major advantage of MD over traditional thermal distillation is that it requires a substantially lower thermal energy …
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Organic fouling of desalination membranes
… any water source, but it is susceptible to membrane fouling, which can reduce product water quality and raise energy consumption. Fouling can be reduced through (energy-intensive) pretreatment, delayed by membrane coatings, and partially reversed by cleaning. However, poor understanding of …
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Pore Wetting in Desalination of Brine Using Membrane Distillation Process
… is one of the state-of-the-art pressure-driven membrane desalination technologies, it is incapable of desalinating high-salinity streams due to the very high osmotic pressure to overcome. Membrane distillation (MD) is one of the emerging methods, which has attracted much attention for …
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Material development and characterization for high salinity water for desalination by membrane distillation at high temperature and pressure
… manner for treating high TDS water, membrane distillation (MD) might be a potential economically viable option for this purpose. But, current membrane distillation technology that is operated at low temperatures (e.g. ~50C) produces low water flux. By increasing the driving potential …
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Application of Hydrothermal Carbonization, Membrane Distillation, and Algae Cultivation for Sustainable Dairy Manure Treatment
… carbonization (HTC), algae cultivation, and membrane distillation (MD). HTC converts dairy manure into a low-grade coal that can be used as an energy source, while expelling nutrients into the HTC aqueous product (HAP). The algae can be cultivated on the HAP, where they consume the nutrients, …
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