Monthly Archives: July 2017

Membrane filtration is an effective way to remove pollutants and microorganisms from water and wastewater. However, membrane fouling lowers efficiency over time when considering rejection values and water flux.  Fouling is typically biological or particulate; fouling rate is a function of the membrane pore size relative to the size of the foulants and also the interactions between the membrane and the foulants. Membrane surface charges and affinity for water directly affect membrane biofouling intensity. Applying electric charge to the membrane surface is one of the methods that has been recently trending for mitigating biofouling [1]. Use of an electroconductive nano-carbon-based membrane has also been reported for mitigating membrane fouling by integrating membrane filtration [2].

In an effort to meet the demand for a cross flow cell that allows users to apply alternating voltage to a flat sheet membrane, Sterlitech recently developed an

Did you know that Sterlitech offers 16 different material types of microporous membrane and media disk filters?  The available combinations of materials, pore, and disk sizes, equates to well over 1000 unique filters.  To many, that may sound like an overwhelming selection to choose from, whether you’re unsure where to start, have narrowed down your selection to one or a few material types, or have a clear range of pore sizes to stay within for optimal separation; in any case, we can help to further refine your selection.

“That’s great!” you say and “I would like to test several different filter options, but I don’t want to buy standard packs of up to 100 disk filters, when I only need a few filters for my evaluation.”  Don’t worry; we still have you covered. 

Sterlitech offers

There’s no shortage of news stories on a tiny bacterium continuing to cause big trouble; Legionella. In a recent search of Google News, 1800 different stories from across the globe are revealed for June of this year when searched strictly against the term “Legionella.”  Illustrations of how serious a threat is this bacterium can be are seen across the variety of the news stories; from people becoming infected after using contaminated showers in gyms, hotels, hospitals, to babies born in birthing pools, basic residential water supplies, and even a simple backyard garden hose.  So, what is this nasty little microorganism, and why is it still causing trouble? To look closer, let’s revisit two newsletter stories Sterlitech originally published back in December 2010 and April 2011

NADIR flat sheet membranes from Microdyn-NADIR are now available. NADIR Polyethersulfone (PES) membranes are offered in a wide range of MWCO: 4, 5, 10, 20, 30, 50, and 150kDa in addition to the 150kDa Polyvinylidene fluoride (PVDF) and 500kDa Regenerated Cellulose (RC) membranes. Addition of NADIR membranes to the Sterlitech product line fills the gaps in our membrane flat sheet offering MWCO spectrum. NADIR membranes are designed for municipal and industrial applications. These are permanently hydrophilic and chemically resistant, increasing performance and longevity of the membranes and significantly reducing fouling.

These new additions are available in large sheets, as well as in precut coupons for use in the Sepa CF filtration cell, CF042 and CF016 filtration cells, and most stirred cells. Custom membrane