Ultrafiltration

Humic acids are primarily a result of the microbiological degradation of surrounding vegetation and animal decay and enter surface waters through rain water run-off from the surrounding land. This often gives rise to large seasonal variations, high concentrations in the wet season and lower concentr

Ultrafiltration membranes are used extensively in dairy industry. The formation of fouling deposits during processing of dairy fluids has a significant impact on the performance of these membranes. In the current study, performance of a 30 kDa membrane has been investigated which is used to process

The objective of this study was to evaluate the effects of operating modes, membrane materials and pore size on natural organic matter (NOM) fouling. A range of flat sheet microfiltration (MF) and ultrafiltration (UF) membranes were tested under conditions of various constant pressure and constant f

The Calembo Company (seafood conditioning, Sfax, Tunisia) uses 50 m3/d of drilling water per ton of fish to condition cuttlefish before freezing. The water used is characterised by its high degree of hardness, high sulphate concentration and salinity (67 g.l!1). Consequently, generated effluents con

The essential point for a successful seawater reverse osmosis (SWRO) plant is pretreatment that provides consistent and high-quality feed to SWRO membranes. Advances in membrane technology and increasing requirements on water quality have stimulated the use of ultrafiltration (UF) for SWRO pretreatm

Biological wastewater treatment plants (BWWTP) are widely used to treat effluents from chemical process industry. However, there exist refractory substances, such as phenolic compounds, which require previous treatments. Advanced oxidation processes (AOP) are thoroughly being studied as pre-treatmen

This study gathers experimental results that illustrate the efficiency of ultrafiltration in the purification of aqueous solutions of metal ions beforehand complexed on water-soluble macromolecular substrate. For this purpose, a commercial polyethersulfone ultrafiltration membrane is employed in a m

The paper comprises a case study on the implementation of the advance treatment process (ATP) in seven smallscale textile industries. The ATPs installed and commissioned are in compliance with the Statutory Board directions for recovery and reuse of treated effluent leading to zero effluent discharg

Fouling of UF membranes by humic acid particles was studied. Six types of UF membranes namely PAN 20 kDa (Rhone-Poulenc), PAN 100 kDa (Osmonics), PES 150 kDa (Microdyn-Nadir) and PS 10, 50 and 100 kDa (Permionics) were tested. Analysis of the results showed that the resistance due to the adsorption

The possibility of complete fractionation of olive mill wastewater (OMW) was investigated using membrane technology. Combinations of different membrane processes were used for the fractionation of OMW into by-products that may be further developed to achieve reduction of the expenses involved. Ultra