Ultrafiltration

The preparation conditions of a polyacrylonitrile (PAN) ultrafiltration membrane for wastewater treatment was investigated. The PAN membranes were prepared by the phase-inversion process in a water gelation bath using casting solutions of varying compositions of PAN/polyvinylpyrolidone (PVP)/N,N-dim

Membrane filtration has become firmly established as a primary technology in ensuring the purity, safety and efficacy of modern Biopharmaceuticals. As the Biopharm/Biotech industry comes to maturity filtration has a key role to play in the reliable and economic production of a wide range of biologic

The feasibility of ultra and microfiltration depends strongly on the achieved net flux. Direct treatment of surface water frequently results in low net fluxes and high cleaning frequencies. This is largely determined by the quality of the feed water and the mechanisms that determine the fouling and

Increases in population and water use are increasing pressures on conventional water sources. The use of alternative sources for non-potable applications can relieve some of this demand. Poor quality ground water, combined with quantities of grey water and rain water, was identified as potential alt

Concentration polarisation is one of the main limitations of permeate flux through membranes. A conventional crossflow ultrafiltration apparatus was modified by the inclusion of electrodes which permitted an electric field to be produced across the ultrafiltration membrane. This study examined the i

Collaborative work between Thames Water Utilities and PCI–Leopold outlines how pilot trial work has been taken through to full-scale application of a 9 Ml/d, ultrafiltration plant on a “significant risk” Cryptosporidium groundwater source. The pilot plant was subjected to a wide range of feed water

Following laboratory-scale research as part of the LIFE programme, a pilot plant with a capacity of 30 m3/d was built. This plant allowed the optimization of the parameters necessary for the engineering analysis, as well as the extrapolation of results and the development of a treatment plant with a

This study focuses on an hybrid process which couples ultrafiltration and stripping. The aim is to treat spring water to disinfect it and to enhance its pH without adding reactants. The first part of the study focused on stripping in a batch stirred reactor without UF. Air was chosen as the strippin

Membrane technology has become of great interest for treatment of different water feeds including seawater. Depending on the membrane type, materials in the feed and process conditions the membrane will lose its performance during time. Fouling is the most important problem associated with the appli

We assessed the potentiality of reducing concentration polarization and enhancing ultrafiltration of macromolecules via gas sparging (gas bubbles supplied to the UF system with the feed solution). Consideration was given to the problem of how the quantity of the gas sparged and the duration of the p