Results 221 to 230 of about 10,921 (256)
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2015
All the species permeating a membrane generate a stream passing through the membrane, a stream characterized by a flow rate according to the actual operating conditions.
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All the species permeating a membrane generate a stream passing through the membrane, a stream characterized by a flow rate according to the actual operating conditions.
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Inorganic particles increase biofilm heterogeneity and enhance permeate flux
Water Research, 2014This study investigated the influence of inorganic particles on the hydraulic resistance of biofilm grown on membrane surface during low-pressure dead-end ultrafiltration. Gravity-driven ultrafiltration membrane systems were operated during several weeks without any flushing or cleaning.
A. Chomiak +3 more
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Permeation flux of hydrogen through plasma facing materials
Physical Review B, 1997A general formula for simultaneous gas- and plasma-driven permeation of hydrogen (tritium) has been developed by an electrical circuit analog, in which the permeation potential and resistance are defined for both diffusion in the bulk and recombination on the surface and the gradient of permeation potential against permeation resistance is considered ...
W. M. Shu, K. Watanabe
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Permeate flux improvement along a tubular ultrafiltration membrane
Desalination, 1988Abstract Important research efforts are directed towards the study of the concentration polarisation in pressure-driven membrane processes at the upstream solution-membrane interface. Seldom, solute adsorption or retention are mentioned at the downstream permeate-membrane interface, except for dialysis processes.
B. Du Tre, D. Taeymans
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Permeate-Flux Declination for Ultrafiltration along Membrane Tubes
Separation Science and Technology, 2010The correlation equations for predicting local permeate fluxes in tubular-membrane ultrafilters were derived from mass and momentum balances by the modified resistance-in-series model with the considerations of the increment of concentration polarization and the declines of transmembrane pressure and flow rate, along the membrane tube.
H. M. Yeh, Z. Y. Lin, C. H. Li
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Steady-state permeate flux of cross-flow microfiltration
Journal of Membrane Science, 1995Abstract A membrane filtration cell was employed in this study to investigate the steady-state permeate flux of cross-flow microfiltration under various operating conditions, including wall shear rate, particle size, membrane pore size, and electrolyte concentration.
Dong-Jang Chang +2 more
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A new helical membrane module for increasing permeate flux
Journal of Membrane Science, 2010Abstract The membrane separation process such as MBR (membrane bioreactor) in wastewater treatment would be more competitive and environmental friendly, if membrane fouling was reduced and higher permeate flux was maintained without consuming extra material or extra energy.
Lifen Liu +3 more
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Prediction of Permeate Fluxes in UF/RO Systems
1980A membrane plant (Ultrafiltration or Reverse Osmosis) can be operated in one of two ways: batch or continuous. The continuous arrangement in its turn can be with partial recirculation (recirculating system), or without recirculation at all (single-pass). In fig. 1 an UF/RO circuit has been sketched.
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Analysis of the slip effect on the permeate flux in membrane ultrafiltration
Journal of Membrane Science, 1999A method for predicting the mass transfer coefficient as well as the limiting permeate flux in membrane ultrafiltration has been found, based upon the boundary-layer theory which takes into account the slip velocity on the membrane surface. The theory presupposes the existence of a slip flow on a porous membrane surface, especially for the limiting ...
H.M Yeh, T.W Cheng
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Fusion Engineering and Design, 2010
Abstract Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma.
Sanjeev K. Sharma +27 more
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Abstract Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma.
Sanjeev K. Sharma +27 more
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