A cross-flow filtration apparatus is provided. The cross-flow filter is a spiral wound filter that includes a semi-permeable membrane wrapped around a perforated central tube. The semipermeable membrane includes a feed spacer and a membrane. The feed spacer is a biocidal feed spacer with a biocidal agent impregnated...

A filtration device having a tubular pressure vessel and a tubular filter assembly is provided. The tubular filter assembly is housed within the tubular pressure vessel and includes a filter element and a split ring seal circumscribing the filter element. The split ring seal has an annular body that includes a first...

The present disclosure relates to a system comprising integrated sensors (169, 170) for measurement of permeate flow and permeate conductivity of individual membrane elements (163) while the are in operation in an RO unit. The flow and conductivity measuring integrated sensors (169, 170) are of a small size that e...

An assembly for treating a liquid is provided. The assembly includes a pressure vessel having first and second ends provided with respective first and second endcaps, a membrane element positioned within the pressure vessel, an adapter coupling the first endcap with a first end of the membrane element, a first set o...

A method for concentration of oligonucleotides from a solution comprising negatively charged oligonucleotides is provided. The method includes the steps of: circulating the solution through an ultrafiltration or nanofiltration unit having a membrane, filtering the solution through the membrane to remove salts from t...