Home > Research Paper Tags > Flux decline
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The water quality of the three seasonal NF feed samples was characterized by U V, DOC, HPLC-0UVA-DOC, XAD, IC and ICP. Surface charge, specific flux variation at different pH and ionic strengths, molecule weight cut-off (MWCO), and functional groups of the NF 200 membrane surface were determined.... were determined. The extent of fouling was significantly dependent on water quality, membrane properties, and operational conditions. Higher flux decline was observed at high DOC, high divalent cations, high alkalinity and low temperature. Temperature strongly affected the specific flux and natura ...
Desalination 132 (2000)
... competitive with traditional methods of water treatment. However, their efficiency can be affected by some parameters such as rejection and permeate flux. In this work, three membrane processes (MF, UF and NF) were used for the treatment of textile effluent sample and factors influencing the flux... In this work, three membrane processes (MF, UF and NF) were used for the treatment of textile effluent sample and factors influencing the flux decline of the used membranes were investigated. MF and UF processes were studied in order to be investigated as pretreatment for the NF process in th ...
Desalination 244 (2009)
The aim of this work was to compare the data on flux decline with time obtained with ultrafiltration experiments of polyethylene glycols (PEGs) performed under different experimental condition ...
Desalination 222 (2008)
A semi-empirical crossflow ultrafiltration (UF) model that can predict permeate flux as a function of time for different operating conditions was considered. Model predictions were analysed and compared with the experimental results... that it is not possible to estimate the parameters χ and δ theoretically. However, the model is interesting because it predicts permeate flux decline with time only from steady-state experimental data. Although the model is semiempirical, it does not require experimental data from flux decline ...
Desalination 198 (2006)
... a low velocity of 5 m/h. A post-treatment of reverse osmosis after a pretreatment of GAC and anthracite biofilters showed a reduction in normalized flux decline (J/J0) from 0.22 to 0.12 and 0.35 to 0.21 during the first 20 h, respectively. The RO flux for seawater declined at a faster rate an ...
Desalination 249 (2009)
... chemical agents. The effect of the LS–CS dosage, specific cake resistances (") and transmembrane pressure drop ()P) on steady-state rejection and flux was investigated. Also, flux declines were evaluated with respect to various flux decline models. It was found that hardness rejections decrease fo ...
Desalination 159 (2003)
Evaluation of parameters describing flux decline in nanofiltration of aqueous solutions containing organic compounds
... membrane technology is the possible occurrence of fouling. Especially in newer processes such as nanofiltration, understanding of the mechanisms of flux decline and fouling is limited. Water fluxes obtained with nanofiltration of pure water are usually different from those obtained with real fee ...
Desalination 147 (2002)
... 35000 Da molecular weight) aqueous solution at different transmembrane pressures and crossflow velocities. The main goal of this work was to predict flux decline with a model whose input parameters are dependent on the operating conditions. Therefore all the model parameters were theoreticall ...
Desalination 192 (2006)
... isolate exhibited different characteristics in fouling of NF and UF membranes due to their distinct characters. The colloidal fraction showed high flux decline and fouling on NF and UF membranes primarily due to the effects of pore blockage. The HPO and TPI fractions exhibited less fouling and flux ...
Desalination 145 (2002)
... is introduced as a better parameter compared to permeate volume, time, and delivered DOC to provide a reasonable comparison of NOM rejection and flux-decline trends. Retained DOC/NOM was calculated, which influences NOM concentration polarization at the membrane interface, and transpor ...
Desalination 173 (2005)