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Your source for new information on filtration equipment applications and processes.
Sterlitech is launching new flat sheet membranes from Microdyn Nadir: NP010 and NP030. Both NF membranes have a Polyethersulfone (PES) active layer and Polyethylene/Polypropylene (PE/PP) support layer. NP010 and NP030 are chemically resistant and can be used at high temperatures, which makes them suitable for applications such as acid/caustic preparation, and for the metal and chemical industry.
Product NP010 NP030 Manufacturer Microdyn Nadir Microdyn Nadir Applications Acid/caustic preparation, metal and chemical industry Acid/caustic preparation, metal and chemical industry pH Range 0-14 0-14 Permeate Flux (lmh1)/psi >200/580 >40/580 Na2SO4 35-75% 80-95% Polymer PES Active layer, PE/PP Support Layer PES Active layer, PE/PP Support Layer
1 LMH stands for Liter per Meter Square Membrane Active Area per Hour
These new additions are available in large sheets, as well as in precut coupons for use in the Sepa CF, CF042, and CF016 filtration cells, and most stirred cells. Custom membrane sizes are also available upon request. For more information about NP010 and NP030 or if you need assistance to find products suited for a specific application, please contact Sterlitech. To browse our complete selection of NF membranes or to place an order with us, click here.
Friday, December 20, 2013The closest most people get to using a membrane filter happens when they slide a paper filter into a coffee machine each day for their morning brew. That realization gave us a great idea for a practical gift that we know many of you could use: a handsome coffee mug monogrammed with Sterlitech’s logo.
From now until the end of January, with any order from the Sterlitech website or the Glass Fiber Store, you can enter the coupon code “MUG 2014” to claim a free coffee mug. However, our supply of mugs is limited, so pay us a visit and claim yours
Friday, February 03, 2017
Membrane fouling, defined as the accumulation of particles and organic matter at the surface or in the pores of membranes occurs during membrane filtration. Membrane fouling results in membrane performance loss, i.e. lower rejection values, lower permeate flux and higher pressure drop, which translates into higher operational cost. The extent of fouling depends on the feed quality, operating conditions, membrane characteristics and module design. Membrane fouling can be divided into three types: hydraulically reversible, chemically reversible and irreversible fouling. Hydraulically reversible fouling can be removed physically (e.g. by introducing turbulence at the proximity of a membrane surface) or through backwashing of membranes. On the other hand, chemically reversible fouling can only be removed by chemical cleaning methods, while irreversible fouling is permanent. Typically chemical cleaning is performed when fouling cannot be physically removed. Chemical cleaning of the membrane will remove the foulants from the membrane surface and restore the membrane performance. Although different membrane manufacturers have varying guidelines and recommendations for the frequency of chemical cleaning, as a good rule of thumb chemical cleaning is done when: Normalized permeate flow drops about 10-15% Normalized permeate quality decreases by 10-15% Normalized pressure drop increases 10-15% Choosing the right cleaning chemicals and respective concentration depends on the nature and intensity of fouling, and their chemical compatibility with the membrane and the wetted materials in the membrane unit. The cleaning procedure, commonly referred to cleaning in place (CIP) will vary with frequency, operating pressure, flow, temperature, and pH, and is generally a function of the fouling type and intensity, as well as the membrane module design. While some membrane manufacturers offer proprietary chemicals and cleaning procedures, general guidelines for membrane cleaning in place (CIP) include: Cleaning Chemicals: For organic fouling: NaOH 0.05-0.1% For inorganic and colloidal fouling: Strong acids (H2SO4,H3PO4, HCl, Citric Acid) 0.1-0.2% Cleaning Pressure: 15-75 psi (1-5 bar) pH Range: Cellulose Acetate (CA): 3-8 Polysulfone (PS): 2-11.5 Polyamide (PA) 2-11.5 Cleaning procedure is more effective at elevated temperatures: e.g. 35-50°C Circulation Time: Most cleaning chemicals should be circulated for 10 - 30 minutes, followed by a 10 - 30 minute soaking period and then a final 10 minute recirculation prior to flushing. For high fouling intensities, up to a 3 hour circulation may be required. Circulation Rate: Chemical cleaning is more effective at higher flow rates. Higher flow rates induce higher cross flow velocities and as a result higher shear at membrane surface which has been proved to be effective in fouling control. To learn more about the membrane cleaning procedures, please contact one of our Membrane Process Development Specialist at email@example.com.
Friday, February 03, 2017
Next month, Sterlitech Corporation will be exhibiting our filtration products at Seattle CannaCon. CannaCon is the premier trade show in the Pacific Northwest for all industry-related operations for the emerging cannabis market. Sterlitech has added numerous new products aimed at making the workday easier for every sized operation of growers, processors/extractors, and QC test labs and this is our first time exhibiting at Cannacon. If you’re going to the Seattle show February 16-18, stop by Booth #754 to say hi to the reps, take a look at our filter/extraction/test supplies, and to enter to win a botanical extract filter kit! Visitors to our booth will also receive a discount code for their next online order for one of several different botanical extract products. March 6-9, Sterlitech will be once again exhibiting at Pittcon in Chicago at McCormick Place. Who should attend Pittcon? Anyone who identifies, quantifies, analyzes or tests the chemical or biological properties of compounds or molecules, or who manages these laboratory scientists. Sterlitech is proud to offer numerous products aimed at this community of global scientists and distributors, and we invite you to come see us and several of these products at Booth #1816 during the exhibition portion of the show. Pittcon is a globally centered tradeshow and conference offering a unique opportunity to get a hands-on look at the latest innovations and to find solutions to all your laboratory challenges.
Thursday, February 02, 2017
Sterlitech is proud to launch a new product based on the successes of the Autofil bottle-top disposable filter funnel, now in a solvent-resistant version. The Autofil PP bottle-top filters are a revolutionary new way to purify solvents for analytical applications or purify buffers and extracts. These new devices are the world’s first single-piece polypropylene funnel, designed to withstand harsh solvents that would normally degrade traditional polystyrene bottle-top filter assemblies. All active components are FDA-grade, which makes Autofil PP perfect for extracting compounds used in the food and drug industry. Autofil PP is designed to conveniently fit on top of most laboratory bottles with a GL45 thread, and works seamlessly with the same no-spill cradle system that made the original Autofil funnels such a success. The Autofil PP funnels are not pre-sterilized owing to their predominant use within analytical chemistry, but this service can be quoted separate if needed. The Autofil PP funnels are available in three membrane types: PES, Nylon, and PTFE. The PES provides an ideal application solution for the botanical extraction/cannabis market when filtering ethanol-based extracts. The Nylon and PTFE versions are perfectly suited for filtering HPLC solvents containing acetonitrile, DMF, methanol, and more. Pore sizes include both 0.2μm and 0.45μm options in 500mL and 1000mL funnel capacities. Using an HPLC machine for analysis? Sterlitech offers the world’s most advanced and economical waste management solution for HPLC solvents that controls VOC vapors. Available in both robust Heavy Duty and UN/DOT transport approved containers, EZwaste is incredibly flexible in its application. Protect yourself from harmful, volatile compounds in the laboratory with the patented EZwaste Solvent Waste System.
Thursday, February 02, 2017
Did you know that the potable water on board the International Space Station (ISS) is up to 80% recycled from astronauts’ sweat, urine and other reclaimed wastewater sources? This means bacteria testing to monitor the quality of the recycled water is frequently required to ensure astronauts’ health and safety of consumption. Traditional test methods for bacteria testing can be timely, and complex, however a new approach currently being evaluated by European Space Agency (ESA) astronaut, Thomas Pesquet, aims to improve the speed and efficiency of these tests on board the ISS. His experiment involves depositing a water sample onto Aquapad, developed by bioMérieux. Aquapad consists of a paper pad impregnated with powdered growth medium to create a 3D petri dish, on which the microbes are revealed in the form of countable, colored spots; a simple calculation determines whether the water is safe to drink. Traditional bacteria counting methods typically utilize a glass microanalysis holder, Gridded MCE filters, and a vacuum pump. The simplicity of the design of the device creates potential for use in disaster areas or in situations requiring less expensive, faster results. You can follow Thomas and his recent adventures on Facebook or Flickr.
Monday, December 12, 2016
Our skid mounted membrane filtration systems are specifically designed to bring a new level of ease to bench scale testing of membrane filters and small batch processing. The goal for developing this product was to help our customer do what they do best – research and develop – and minimize time plumbing, wiring and waiting! We are also aiming to ship each skid mounted system within 2 weeks of purchase date. Already in use in many academic and industry R&D labs for applications such as membrane development, quality assurance, materials research and batch production of micro biologicals, chemicals, pharmaceuticals and others, these skid mounted systems increase productivity and establish consistency in experimental design. Organizations with several different interests can quickly adjust operating parameters to meet an assortment of testing goals. Benefits include: Plug in ready Multiple configuration options Certified at factory to be leak and trouble free Pre and post-sales technical support ensures users receive optimized equipment and are provided with Sterlitech’s operational training webinar within one week of delivery. Each webinar is interactive and is tailored to the skid design and to the needs and skill level of its users. To obtain more information about Sterlitech’s Skids view the Sepa skid animation or contact a Membrane and Process Development expert at Sterlitech at 1-877-544-4420 or firstname.lastname@example.org.