Page 5 - Filtration Resources
A compilation of application notes, case studies, white papers and other technical papers for various filtration applications.
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September 14, 2023
Because they have similar outward appearance, it is easy to presume that the various microporous membrane filters and flat sheet membrane filters offered by Sterlitech have similar pore structures. Some consider symmetry to be the epitome of beauty, but with respect to filtration, it’s all relative. In reality, there is a rich variety of pore structure morphologies resulting from the techniques and materials used to manufacture the membranes.
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May 12, 2023While there is currently a trend towards a more natural, unfiltered wine, filtration is broadly used by winemakers to improve the texture, clarity, and safety of wine. As we celebrate National Wine Day on May 25th, we thought we would take a closer look at membrane filtration in the winemaking process.
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February 17, 2023How to Handle and Preserve Samples? Non-representative particulate matter and debris such as leaves, twigs, fecal matter, insects and fish should be removed from the sample if their inclusion is not warranted.
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February 17, 2023Microplastics, tiny pieces of plastic measuring less than 5mm in diameter, are a growing concern due to their environmental persistence and negative impact on both environmental and human health. Microplastics originate from a wide range of industrial and consumer sources, including pharmaceuticals.
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January 18, 2023Suspended solids and other solid substances in wastewater. All freshwater sources contain solid matter, which can either be in the form of suspended solids or dissolved solids. The total of both of these forms is referred to as total solids (TS), which is the total amount of dried residual matter remaining after the water is evaporated without first having been filtered.
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October 13, 2022What is the purpose of spacers and shims used with the membrane test cells, and do I need them? Crossflow velocity (CFV) refers to the linear rate of flow of the feed solution as it passes tangentially over the surface of the membrane filter and is measured in meters or feet per second. Some of the feed solution will permeate through the membrane filter, while the balance will flow along the surface of the membrane and collect as concentrate that can be recirculated through the system. The crossflow velocity has a direct impact on the fouling rate and the occurrence of concentration polarization — where a concentration gradient forms in the fluid adjacent to the membrane surface.
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October 13, 2022Oktoberfest is an annual beer festival held over the course of two weeks during September-October in Munich, Germany Its origins date back to October 12, 1810, when the festival was first held to celebrate the marriage of Prince Louis of Bavaria, who later became King, to Princess Therese von Sachsen-Hildburghausen. Over the years, the festival has evolved to include an amusement park and fun-fair, food and drink stalls, and several large and lively beer halls, where much of the merry-making takes place.
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August 13, 2022Ultrafiltration and Nanofiltration membranes are used in a wide range of applications and industries to separate unwanted dissolved compounds from water, wastewater, and other liquids. But, in order for a membrane to efficiently perform a desired separation, an appropriate molecular weight cut-off (MWCO) must be selected. Molecular weight is generally most accurate when selecting an Ultrafiltration membrane; it is more of a guide or approximation when working with Nanofiltration.
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July 13, 2022Membranes don’t always perform as expected, but asking the right questions can reduce down time due to troubleshooting. Below are a few common filtration performance challenges and troubleshooting tips.
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June 22, 2022Ammonia nitrogen (TAN), a major pollutant in wastewater, consists of non-ionized ammonia (NH3) and ammonium ions (NH4 +), which are pH- and temperature-dependent. To determine its presence in water is important because of its harmful effects on both humans and aquatic organisms.
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