The throughput and efficiency of membrane separations make polymer filtration membranes an important resource for the pharmaceutical, food and wastewater treatment industries. Nanofiltration (NF) membranes fill an important niche between nonporous reverse osmosis membranes, which have comprehensive solute rejection and low solvent permeability, and porous sieving ultrafiltration membranes. Howe...

The suitability of polysulfone ultrafiltration membranes (UFM) designed for commercial water treatment has been investigated for separation of protein (PR) from sweet whey. Ultrafiltration (UF) of whey originated from dairy has been realized by a self-made pilot plant, which has been in service for about one year. The influence of two whey temperatures (9 and 30 °C) on the efficiency of protein...

The nanometer-scale size and hollow, cylindrical shape of carbon nanotubes suggests to many researchers that they may be used as molecular sieves, nanoscale test tubes, or hydraulic actuators or motors. They might also be used as ultrafiltration membranes (membranes with pores on the order of 1-100 nm) that are widely used in pharmaceutical industries. Such a nanotube membrane might function by...

Ultrafiltration (UF) is a low-pressure membrane filtration process primarily used to remove turbidity and suspended solids during the production of safe drinking water. As reported by Furukawa (2008), research, coupled with advancements in membrane technology and increasingly stringent regulations, has led to further adoption of low-pressure membranes for treatment of surface water. In many cas...

The use of cellophane in ultrafiltration is recommended. It is shown that after it has been swollen in water it does not hold back molecules such as sucrose but that it holds back all but the finest colloidal particles. Two methods are given for progressively decreasing the size of the pores until the cellophane becomes a very fine molecular sieve. A sieve structure as the chief factor seems mo...

Clostridium perfringens type A toxin produced in Jayko & Lichstein medium was subjected to various concentration and purification procedures. The results obtained with 3 different ultrafiltration membranes followed by gel filtration showed that by using Millipore PSED OHV10 and Amicon XM-100 filter membranes in combination, a three-hundred-and-fivefold purification could be achieved as against ...

Several commercial polymeric ultrafiltration membranes were screened for their performance with aqueous ethanol solutions. The method of conditioning the membrane has a major effect on solvent flux, membrane integrity and their pressure ratings. Gradual solvent exchange with successively higher concentrations increased in small doses appears to work best with completely miscible solvents such a...

Abstract pH shift induced Aqueous phase separation (APS) is a novel and more sustainable water-based approach to create microfiltration, ultrafiltration, nanofiltration membranes. APS allows for control over membrane pore size structure in ways analogous traditional non-solvent (NIPS). Unfortunately, existing approaches require extreme shifts (from 14 1) obtain successful membranes, limiting th...

Aquatic viruses are major threats to global aquacultural productivity. While conventional diagnostic methods for disease investigation laborious, time-consuming, and often involve the sacrifice of animals, environmental DNA RNA (eDNA/eRNA) tools have potential in being non-invasive alternatives effective early detection various pathogens simultaneously. In this study, three seawater filtration ...

The retention behaviour of polyimide ultrafiltration membranes was investigated using dilute solutions of polystyrene in ethyl acetate as test solutions. It is shown that flow-induced deformation of the polystyrene chains highly affects the membrane retention. This coil-stretch transition is not instantaneous, but gradual. The concept of a deformation resistance has been introduced to explain t...