This paper presents the implications of the so-called optimized NF membrane properties on the economic assessment as well as the process performance of NF membrane system which is also discussed. The predictive model for NF membranes such as the Donnan steric-pore model has been used in conjunction with an economic...
Membrane filtration is used for separating oil from water and treating waste metal-working fluids. This work presents two different filtration systems and investigates the possibility of reusing their permeates. The first system consists of an ultrafiltration membrane UF followed by a nanofiltration membrane NF. The second system consists of direct...
The paper work aims to describe and characterize inorganic membranes at low cost and to study their performance through a fermentation-cross flow micro filtration MF coupling process. New mineral membranes were created from sintered clay in which a certain quantity of coal was added to the mixture before the sintering...
Surface modification of nanofiltration cellulose acetate CA membranes was carried out by alternating layer-by layer deposition of acidic chitosan CHI and sodium alginate ALG as the cationic and anionic polyelectrolyte, respectively. The pore size of the CA substrates monitored by the annealing temperature was determined from the retention values of...
The main objective of this work can be specified in three steps as follows: develop a computer program as a general model for any type of RO system, predict plant performance as a function of time (8 months of operation), and perform comparative studies on the performance of the two...
The competition between membrane and thermal methods as well as the reduction of unit costs can be observed in the desalination field. Because of the high share of pre-treatment in the total cost of desalination, the increase of recovery rate may improve the performance of desalination to a great extent....
Biofouling, due to microbial growth on membranes, is a common problem during the operation of water treatment membrane plants. It leads to an increase in operation and maintenance costs due to the deterioration of membrane performance and ultimately shortening membrane life. In an attempt to develop membranes with lower fouling...
A nanofiltration membrane has been developed by UV-photografting. Sodium p-styrene sulfonate was used for the modification of a polysulfone ultrafiltration membrane. The membrane cut-off was estimated. The grafted membranes have been evaluated for the removal of five different dyes with an aim to reuse water in the process house. The...
The pervaporation performances of a series of functionalized syndiotactic poly (styrene-co-4-methylstyrene) SPSM membranes for various alcohol mixtures were investigated. The effect of functionalization on the thermal properties and polymer structure of the SPSM membranes were also investigated. The crystallinity of the functionalized SPSM membrane is lower than that of the...
Composite membranes for pervaporation of water/alcohol mixtures were prepared by consecutive alternating adsorption of poly acrylic acid polyanion and poly ethylenimine polycation on a polyamide-6 substrate. The influence of preparation conditions on the pervaporation separation properties of polyelectrolyte multilayer composite membranes was studied. Variation of polyelectrolyte concentration of the dipping...
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