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Showing 1 to 20 of 34 for “"Ultrafiltration (UF)"”.
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Dextran Polymer Fractionation by Production Scale Chromatography and Ultrafiltration
… of gel permeation chromatography (GPC) and of ultrafiltration (UF) theory have been made. The aims of the project were to fractionate dextran, a polyglucose, on an existing chromatograph to achieve more optimum conditions of operation and to eliminate the silica dissolved from the …
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Improving the durability and performance of hollow fibre membranes with nanocomposite and inorganic/organic hybrid materials
… osmosis (RO) with microfiltration (MF) and ultrafiltration (UF) membranes is technically and economically feasible with significant advantages over conventional granular media filtration. In these applications, current commercial MF and UF membranes may have shorter lifespans and can wear …
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Characterization and treatment of organic matter, UV quenching substances, and organic nitrogen in landfill leachates
… fractionation utilizing microfiltration (MF) and ultrafiltration (UF) was conducted in conjunction with TOC, nitrogen species, and UV254 absorbance analysis to determine the characteristics of organic constituents present in landfill leachate. The size fraction less than 1thousand Daltons (1 kDa) …
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Modeling of the hydrodynamics within the header of a tubular membrane module.
Ultrafiltration (UF) is one of the many technologies used in the treatment of process and wastewaters. Tubular UF membrane modules are used to treat fiber suspensions for effluent control and chemical recovery in the pulp and paper industry. However, the treatment of pulp suspensions with modules …
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Full-scale operation of a tubular ultrafiltration system in the treatment of oily waste
… biological aerated filter, tubular and rotary ultrafiltration (UF), land application, and constructed wetlands. The primary pollutant of concern was oil/grease (O/G). Separation of the free oil in a single three million-gallon pond was selected as primary treatment. Tublar ultrafiltration was …
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Designing Magnetically Responsive Ultrafiltration Membranes
<p>Ultrafiltration (UF) membranes developed out of a need for protein separation processes. Currently, they are used in a variety of industries ranging from food manufacturing to pharmaceuticals for two main purposes: concentration, separation, and buffer exchange. UF membrane processes in product …
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Screening of Microfiltration and Ultrafiltration Ceramic Membranes for Produced Water Treatment and Testing of Different Cleaning Methods
… microfiltration (MF) membranes and two ceramic ultrafiltration (UF) membranes were tested. The treatment target was to reach a contamination level suitable for further treatment by nanofiltration (NF)/reverse osmosis (RO) polymeric membranes, discharge into sea or injection into oil wells for …
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The fractionation of dextran polymer by ultrafiltration to yield clinical products
A review of ultrafiltration (UF) theory and equipment has been made. Dextran is fractionated industrially by ethanol precipitation, which is a high energy intensive process. The aims of this work were to investigate the fractionation of dextran using UF and to compare the efficiency and costs of UF …
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The use of isothermal membrane distillation in tomato processing
… solids hence required secondary clarification. Ultrafiltration (UF) or microfiltration (MF) were two membrane processes used for secondary clarification of tomato serum. The resultant UF or MF permeates were subsequently processed by IMD or by linked reverse osmosis (RO)-IMD processes. The …
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Performance of polyethylene glycol (PEG) capped zinc oxide nanoparticles as photocatalyst in membrane photocatalytic reactor for industrial dye wastewater treatment
… ZnO-PEG nanoparticles and polypiperazine amide ultrafiltration (UF-PPA) membrane were presented as a great approach in improving normalised flux reduction (58.67%) at best operating condition and produced excellent permeate quality in terms of dye removal (100%), turbidity removal (100%), …
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Evaluation of Yield and Quality of Cheddar Cheese Manufactured from Milk with Added Whey Protein Concentrate
… of whey are produced as a by-product from the manufacture of cheese or casein. The United States has an annual cheese production of about 2.2 billion kg. The cheese industry has also experienced a steady increase in cheese production of about 6% a year (44). In the process, nearly 18.1 billion kg …
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Novel internally-staged ultrafiltration for protein purification
A new ultrafiltration technique based on a multimembrane stack has been developed to fractionate proteins closer in molecular weight than conventionally possible. The technique is illustrated here by obtaining a pure protein product from a binary protein mixture. By employing membranes in series …
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Identification and characterization of aquatic soluble unreactive phosphorus in the hydrosphere with 31-phosphorus Fourier transform nuclear magnetic resonance spectroscopy and high-performance liquid chromatography
… according to molecular size using a series of ultrafiltration (UF) and reverse osmosis (RO) membranes. The UF membrane pore sizes were 30,000 Da and 1,000 Da while the RO membrane had a 95% NaCl rejection rating. The SUP was analyzed as a function of apparent molecular size and season. In the …
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Influence of Operational Characterization Methods on DOM Physicochemical Properties and Reactivity with Aqueous Chlorine
… weight (AMW) was also evaluated using batch ultrafiltration (UF) data in conjunction with a suitable membrane permeation model. Linear independence of membrane solute transport was theoretically described using non-equilibrium thermodynamics and experimentally demonstrated for AMICON® YC/YM …
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Polyvinyl alcohol size recovery and reuse via vacuum flash evaporation
… effluent is a high COD contributor to towel manufacturing plant's Primary Oxygenation Treatment of Water operation, and being non-biodegradable, is a threat to the environment. When all-PVA/wax size is used in weaving, significant incentives exist to recover the synthetic polymer material from …
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Characterisation of feed and membrane properties for industrial ultrafiltration management
The effective industrial management of ultrafiltration (UF) membranes requires an assessment of the impact of feed and membrane characteristics on fouling behaviour in complex feed scenarios. However, this assessment is limited by current understanding of (a) the utility of common foulant …
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An investigation into the mechanisms, consequences and moderators of intradialytic hypotension in paediatric haemodialysis
… (BP) was originally believed to be caused by ultrafiltration (UF) and priming of the HD circuit due to loss of fluid from the intravascular space. However data, largely in adults, challenged this hypothesis leading to a new consensus that intradialytic hypotension has a multifactorial …
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Screening of Polymeric Membranes and Optimization of Operating Conditions for the Treatment of Produced Water
… the operating cost. Microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) are four types of membrane category based on pore size. A four-stage polymeric membrane filtration process was studied for the treatment of produced water since multiple-stage …
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Studies on improved integrated membrane-based chromatographic process for bioseparation
… mixtures were studied in devices using either an ultrafiltration (UF) membrane or a microfiltration (MF) membrane. Experimental results show that the breakthrough time and the protein loading capacities were dramatically improved after coating in both UF and MF modules. For a synthetic yeast …
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An integrated membrane-based chromatographic process for biomolecule isolation and purification
… a commercially available hollow fiber ultrafiltration (UF) cartridge and chromatographic resin beads was developed to reduce the number of devices and steps in bioseparation. This device consisted of ion exchange beads carefully packed on the shell side of a hollow fiber UF module. …
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