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Showing 1 to 20 of 35 for “"transmembrane pressure"”.
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Effects of feed oil content, transmembrane pressure and membrane rotational speed on permeate water quality in high-shear rotary ultrafiltration
… was conducted to investigate the effects of transmembrane pressure, membrane rotational speed and feed oil content on permeate water quality in the treatment of a synthetic metal working fluid in the HSRUF system. Permeate oil grease and total organic carbon concentrations increased with …
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Effects of transmembrane hydraulic pressure on the performance of forward osmosis membranes, The
… membrane performance was evaluated at increasing transmembrane hydraulic pressure to address the knowledge gap between accepted laboratory conditions and proposed operating conditions of O and G FO membrane treatment modules; future FO membrane elements will operate with elevated feed pressure to …
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Interfacially polymerized thin film composite membranes on microporous polypropylene supports for reverse osmosis desalination
… were chosen as the reaction monomers for IP. Pressure dependences of the solvent flux and solute rejection of the TFC membranes were studied using the modified flat sheet membranes up to a pressure of 650-850 KPa. The TFC membranes were characterized by reverse osmosis based removal of sodium …
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Cross-flow ceramic microfiltration of ethanol fermentation broths
… Water flux increased with increasing pore size, transmembrane pressure and temperature.
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Fundamental study of hydrophobic microporous membrane contactors for the recovery of insoluble oil from oil-water mixtures
… For high oil feed concentration, increases in transmembrane pressure and influent flow rate were confirmed to increase oil flux, while higher viscosity lowered oil permeation across the fiber walls. However, an important finding was that, for dilute mixtures, decreases in transmembrane pressure …
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Process Engineering Characteristics of the Hollow Fiber Ultrafiltration of Skimmilk
… membrane unit. The independent variables were transmembrane pressure, flow rate, temperature and feed concentration and the major measured variable was permeate flux (J). Physical properties such as density, viscosity and protein content of the retentate were experimentally determined while …
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Whey Protein Fractionation Using Membrane Separation Technology
… results from the experiments, optimum levels of transmembrane pressure andpH were selected. From the present study, it was found that transmembrane pressure of 76 kPa and pH of 6.3 turned out to be optimum operating conditions giving a combined yield of 69.85%, overall flux of 121.04 LMH and a …
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Characterization and preservation techniques of plant xylem as low cost membrane filtration devices
… be filtered with a ~ 1 cm² filter area using a transmembrane pressure of 5 psi, an amount sufficient to meet the drinking needs of one person. However, the main drawback of xylem is that its permeability drops by a factor of 100 or more after being left out to dry for only a few hours. This …
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Resistance-in-series modeling in high-shear rotary ultrafiltration
… pump is required only to provide transmernbrane pressure and a small amount of recirculation.;A parametric waste-specific study was conducted to assess the ability of the resistance-in-series (RIS) permeate flux model to predict pressure-flux data collected in the HSR-UF of a synthetic MW fluid. …
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A Numerical Model for Flux Decline During the Crossflow Ultrafiltration of Colloidal Suspensions
… $\mu$m in diameter was studied under constant transmembrane pressure mode. Besides the crossflow filtration tests, dead-end filtration tests were also carried out to independently determine a model parameter, the specific cake resistance. Another model parameter, the effective diffusion …
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Modeling nanofiltration for large scale desalination applications
… operating conditions such as feed flow rate and pressure affect the recovery ratio and solute rejection across the membrane. A comparison is made between the results for the flat-sheet and spiral-wound configurations. The comparison showed that for the spiral-wound leaf, the maximum values of …
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Fouling mechanisms in the membrane filtration of single and binary protein solutions
… was investigated via the monitoring of the transmembrane pressure (TMP) and rejection. Electron microscopy was employed to study fouling on microfiltration membranes when single protein solutions were filtered while a novel method involving Matrix-Assisted Laser Desorption Ionisation Mass …
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Screening of Microfiltration and Ultrafiltration Ceramic Membranes for Produced Water Treatment and Testing of Different Cleaning Methods
… than the selected MF membrane. The effects of transmembrane pressure (TMP) and cross flow velocity (CFV) on the permeate quality and flux of the selected MF and UF membranes were investigated. Different membrane cleaning methods including cleaning-in-place (CIP), backwashing and backpulsing …
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Catalytic coatings for vanadium-based hydrogen membranes
… up to 0.71 mol m-2 s-1 at 650 °C and 1 MPa transmembrane pressure. The effect of hydrogen isotopes on permeation at high temperature (600 – 700 °C) was tested on the TiC/V membranes. Protium permeated 1.12 – 1.34 times faster than deuterium, yet no isotopic effect on solubility was measured. …
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Adsorption and membrane filtration for the separation and valorization of hemicellulose from organosolv beechwood hydrolyzates
… as well as low lignin retention as a function of transmembrane pressure, temperature, and pH. In addition, the effect of a prior adsorption step on ultrafiltration of beechwood hydrolyzate was studied. For the process design the statistical approach of response surface methodology and Pareto …
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Comparison of two ultrafiltration membrane systems for whole milk feta cheese production : a thesis presented in partial fulfilment of the requirements for the degree of Master of Technology in Food Technology at Massey University, Auckland, New Zealand
… The ultrafiltration process utilises pressure as a driving force to concentrate milk by removal of water and small dissolved molecules. Hollow fibre and spiral wound ultrafiltration membranes are the two types of membranes that are commonly used for cheese production. An extensive …
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Investigation of effect of dynamic operational conditions on membrane fouling in a membrane enhanced biological phosphorus removal process
… systems by using test membrane modules. From the transmembrane pressure (TMP) data of the test membrane modules, it was revealed that fouling propensities of the MEBPR mixed liquors were similar in both parallel reactors under the operating conditions applied, although the fouling propensity of …
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Enhancement of antifouling properties using rice husk silica particles in polysulfone membrane and optimization of its operating condition
… condition (pH, ionic strength and tranmembranepressure) was carried out by using the response surface methodology (RSM). From the analysis of SEM, FESEM and AFM, results showed that the microstructure of the membrane especially at top layer and sub layer obviously changed with the incorporation …
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Characterisation of fouling behaviour with direct observation technique for membrane bioreactor applications
… of fouling layer can estimated from the transmembrane pressure (TMP) and fouling thickness values measured directly, the number of assumptions is reduced significantly and appeared to be consistent with a number of other studies. The observations during membrane cleaning showed that the …
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Development of Aerobic Granular Sludge Membrane Bioreactor (AGMBR) to Mitigate Fouling
… Low soluble EPS resulted in acceptable rise in transmembrane pressure at membrane flux of 12.5 L/m2.h. An increase in soluble EPS PN correlated with increase in membrane fouling (r = 0.581). Compared to conventional membrane bioreactor, the AGMBR achieved seven times reduction in permeability …
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