Nanofiltration

Surface modification of nanofiltration cellulose acetate (CA) membranes was carried out by alternating layer-bylayer deposition of acidic chitosan (CHI) and sodium alginate (ALG) as the cationic and anionic polyelectrolyte, respectively. The supporting CA membranes were obtained by a phase separatio

Concentrated must is a natural sweetener in wine production, and in addition, it is a vitamin- and aroma-rich drink. In this study the basis of a complex membrane process was developed for must concentration. Modeling the experimental results and using recent economic data, the optimal process param

Currently it is very important that good-quality products are produced at an adequate price. In the case of instant coffee there are several production technologies. Some of these technologies do not provide good quality, and others — while the quality of the product is good — the cost is too high a

Whey is a by-product of cheese production which is used mainly as animal feed or released into the wastewater treatment process, although it is rich in valuable components. Recent developments in membrane filtration have provided exciting new opportunities for large-scale protein and lactose fractio

The results of nanofiltration of natural waters have been described using the extended Nernst– Planck equation. The model of NF based on that DS-5-DK DS-5-DK 1) Gl. 1MPa 1) Gl. 2MPa 1) ww 2MPa 2) Gl. 1MPa 2) Gl. 2MPa 2) ww 2MPa / p lp / Xp [ m] 1) Gl. 1MPa 1) Gl. 2MPa 1) ww 2MPa 2) Gl. 1MPa 2) Gl. 2

Driving force membrane processes seem to be most useful for water treatment. Reverse osmosis, nanofiltration and ultrafiltration have been applied to phthalate removal from water. In the experiment three membranes RO-DS3SE were tested for reverse osmosis, membrane NF-DS5DK for nanofiltration and UF-

The importance of wastewater treatment in the food industry is growing nowadays, because of the rising cost of water and because of environmental pollution. The aim of this study was to decrease the chemical oxygen demand (COD) of two different wastewaters originated from the food industry. If the t

To produce healthy drinking water is the main problem almost all over the world. The aim of this study is to find an efficient method to remove humic substances (HS) from water, because HS cause some types of cancer when they react with chlorine or other disinfection materials composing disinfection

Composite cellulose acetate (CA) based membranes having a hydrophobic top layer made of polymethylhydrosiloxane (PMHS) were prepared with the aim of desalination of brackish waters from the Sahel region of Tunisia having a total dissolved salt content (TDS) of about 4100 g.m–3. The porous substructu

Studies concerning the removal of natural organic matter (NOM) from surface and tap water by nanofiltration are presented. The separation and transport characteristics of nanofiltration membranes were determined. The degree of NOM coefficient and water hardness removal from surface water and a reduc