Water and Fluid Separation News

Ammonia 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.

Eight cups, three liters, one gallon? Straight water or added vitamins and electrolytes? Everybody has an opinion on what it means to be hydrated. Drinking water every day helps regulate mood, keeps the body from overheating, and supports healthy skin and digestion. But staying hydrated without consistent access to clean drinking water can be a challenge. 

Did you know that you can observe osmosis with ingredients that might already be in your kitchen? With only an egg, vinegar, corn syrup, and food coloring, this fun science experiment can shine some light on the invisible but indispensable process of osmosis, reveal the power of the semipermeable membrane, and create colorful eggs just in time for Easter!

The Innovator Cross Flow Filtration Kit is a plug and play system designed for conducting lab scale filtration experiments. With a total hold-up volume <1 liter in the test cell and circulation line, this bench-scale cross flow filtration system is also ideal for filtering valuable feed solutions and or small sample volumes. 

This assembly enables microfiltration, ultrafiltration, and nanofiltration separations using Sterlitech’s Innovator (CF016) or Explorer (CF042) membrane test cells. Our flat sheet membranes are available in pre-cut coupons to fit these cells. The system comes complete with a gear pump, feed carboy, stand-mounted membrane test cell, and all the necessary tubing,

We have observed a growing need in the research community for a high pressure stirred cell to test 25 mm membrane discs. The Membrane Area Reducer was developed in collaboration with Christopher M. Stafford, PhD. and Chris Amigo, Machinist, at the National

In a joint effort to address our customers’ growing need for a Forward Osmosis (FO) membrane module that has a larger membrane active area compared to our flat sheet FO modules, but has a smaller membrane active area than the Aquaporin Inside HFFO2 module, Sterlitech is now pleased to announce the launch of Aquaporin Inside HFFO06 hollow fiber FO membrane module.

Aquaporin Inside HFFO06 hollow fiber FO membrane module has a 0.6 m² membrane active area and can be operated with lower volumes of feed and draw solutions compared to the Aquaporin Inside HFFO2 hollow fiber FO membrane module with a 2.3 m² membrane active area, making this a perfect fit for lab scale testing and small-scale production.

Water molecules are ubiquitous, vital, and may have the world’s most well-known chemical formula (H₂O). The properties of water are quite unique; its solid state is less dense than its liquid state, raising pressure lowers its melting point, and it exists as a liquid at room temperature despite low molecular mass. Even more unique is the water molecule’s ability to exist as two distinct nuclear configurations called spin isomers.

The two spin isomers of water molecules differ based on the direction of the nuclear spin of the two hydrogen nuclei. If the two hydrogen nuclei have parallel spins, the molecule is known as ortho-water. If the two hydrogen nuclei have opposite spins, the molecule is known as para-water. Water at room temperature always contains a mix of these two spin isomers and, until recently, it has been nearly impossible to study them separately.

Now a study co-authored by Stefan Willitsch at the University of Basel has successfully isolated t

Our new Convertible Skid system is specifically designed as a high-pressure system for pressure driven membrane filtration (such as Reverse Osmosis) that can be conveniently converted to perform as either an osmotically driven (such as Forward Osmosis) or a temperature driven process (such as Membrane Distillation) without the need for any additional parts or equipment. This unique capability creates versatility for both industry and academia where research priorities evolve over time.

Features and benefits of the Convertible skid:

• Designed to operate at high and low pressures
• Convertible

Sterlitech now offers our full range of microfiltration and ultrafiltration flat sheet membranes cut in disk sizes compatible with our polymeric stirred cells. These include membranes from SUEZ (GE Osmonics), Synder Filtration, and Microdyn Nadir. These discs are available in 25, 43, 62, 76, 90, and 150 mm diameters.

Disk filters in combination with the low-pressure polymeric stirred cells can be used as a fast and easy method for a wide variety of filtration/separation applications, such as performing filtration of fluids with heavy particle loads or concentrating biological components and macrosolutes (DNA, RNA, protein, etc.).  Other examples of applications for low-pressure filtration include cell harvesting, diafiltration, lysate clarification,

Sterlitech has seen a rising trend in the need for highly resistant membrane filtration systems from researchers.  In response to this trend, Hastelloy^TM (C-276)¹ versions of bench-top stirred cells,  cross flow and forward osmosis test cells have been developed and are now available for the Stirred cells,  Developer, Explorer, and Innovator product families.

Hastelloy^TM (C-276) is a steel superalloy containing nickel, chromium, molybdenum, and tungsten. It has outstanding resistance to corrosion, pitting and cracking when exposed