Results 271 to 280 of about 57,296 (304)

Seawater ultrafiltration: role of particles on organic rejections and permeate fluxes

Environmental Technology, 2013
The role of natural compounds of seawater and added particles on mechanisms of membrane fouling and organic matter rejection has been investigated. Ultrafiltration (100 kDa) has been conducted in both dead-end (out/in) and tangential (in/out) modes on polysulfone hollow fibre membranes.
Massé, Anthony, Thi, Hanh Nguyen, Roelens, Guillaume, Legentilhomme, Patrick, Jaouen, Pascal   +4 more
openaire   +3 more sources

Effects of ozonation on the permeate flux of nanocrystalline ceramic membranes

Water Research, 2005
Titania membranes, with a molecular weight cut-off of 15 kD were used in an ozonation/membrane system that was fed with water from Lake Lansing, which had been pre-filtered through a 0.45 microm glass fiber filter. The application of ozone gas prior to filtration resulted in significant decreases in membrane fouling.
Bhavana S, Karnik, Simon H R, Davies, Kuan C, Chen, David R, Jaglowski, Melissa J, Baumann, S J, Masten   +5 more
openaire   +2 more sources

A crossflow filtration system for constant permeate flux membrane fouling characterization

Review of Scientific Instruments, 2013
Membrane fouling is often characterized using a crossflow filtration apparatus. Typically, the transmembrane pressure (TMP) difference is fixed, and the flux is allowed to decline as the membrane fouls and the resistance to mass transfer increases. However, as flux varies, so too does the rate at which foulants are brought to the membrane surface, so ...
Daniel J, Miller, Donald R, Paul, Benny D, Freeman   +2 more
openaire   +2 more sources

Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST

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, Hideki Zushi, Ikuji Takagi, Yuki Hisano, Mizuki Sakamoto, Yuta Higashizono, Taichi Shikama, Sigeru Morita, Tetsuo Tanabe, Naoaki Yoshida, Kazuaki Hanada, Makoto Hasegawa, Osamu Mitarai, Kazuo Nakamura, Hiroshi Idei, Kohnosuke N. Sato, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima, Yousuke Nakashima, Nobuyuki Nishino, Yuji Hatano, Akira Sagara, Yukio Nakamura, Naoko Ashikawa, Takashi Maekawa, Yasuaki Kishimoto, Yuichi Takase   +27 more
openaire   +1 more source

Decline of permeate flux for ultrafiltration along membrane tubes

Desalination, 2002
The decline of permeate flux for ultrafiltration along membrane tubes was predicted from mass and momentum balances, based on the resistance-in-series model coupled with the considerations of the declinations of flow rate and transmembrane pressure along the membrane tubes.
openaire   +1 more source

Permeate recovery and flux maximization in semibatch reverse osmosis

IDA Journal of Desalination and Water Reuse, 2013
AbstractMost reverse osmosis (RO) and nanofiltration (NF) processes operate as once through or plug flow (PF) systems in which permeate recovery, flux and cross-flow are coupled. Such processes are well suited for applications where permeate recovery percentages are limited and where well pretreated source waters of uniform composition are available ...
openaire   +1 more source

Permeate flux decline in cross-flow microfiltration at constant pressure

Desalination, 2010
Abstract Microfiltration processes are frequently used to separate solids from aqueous suspensions. The rejection of suspended matter is facilitated by means of a size exclusion mechanism and is affected by membrane properties, characteristics of the suspension and operating conditions.
S. Buetehorn, F. Carstensen, T. Wintgens, T. Melin, D. Volmering, K. Vossenkaul   +5 more
openaire   +1 more source

Gas separation by permeators with high‐flux asymmetric membranes

AIChE Journal, 1983
AbstractThe permeation behavior of the high‐flux asymmetric membrane differs from that of the conventional symmetric membrane. A calculation method for predicting the gas separation performance of a permeator with asymmetric membrane is presented. The model takes into account the permeate pressure drop and is applicable to both hollow‐fiber and spiral ...
openaire   +1 more source

CFD modeling of permeate flux in cross-flow microfiltration membrane

Journal of Membrane Science, 2005
Abstract This paper reports the results of a study on a three-dimensional computational fluid dynamics (CFD) simulation for predicting the water permeate flux through a microfiltration membrane. The pressure distribution upon the membrane surface was obtained using an in-house CFD package.
M RAHIMI, S MADAENI, K ABBASI
openaire   +1 more source

Prediction of Permeate Fluxes in UF/RO Systems

1980
A 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.
openaire   +1 more source