Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/133796
SHOWCASE Dow collaborates on non-mechanical filter … Dow Water & Process Solutions (DW&PS) has entered into a collaboration agreement with Ahlstrom Corporation to use the Finnish company's Disruptor® technology for drinking water applications. The agreement combines Dow's marketing, research and manufacturing expertise with Ahlstrom's innovative nonwoven fiber technology to produce a new set of drinking water purification products that offer excellent pathogen rejection while operating at high flow and low pressure. The development of Ahlstrom's electroadsorptive technology started nearly 10 years ago with fundamental research by Fred Tepper of the Argonide Corporation. His early work was partially funded by a grant from NASA for the development of water filters to be used on space exploration vehicles. In 2006, Ahlstrom became the exclusive licensee of the electroadsorptive technology now known as Disruptor®. It is not a mechanical filter medium; instead, it removes many submicron pathogens and inorganic contaminants through electroadhesion and ion exchange (IX). Dow says that the main benefits are: • Health and safety: Virtual removes microorganisms that can cause sickness by removing 99.9999% of all bacteria, 99.99% of all viruses and 99.9% of all cysts in a water stream • High performance: Operation at a high flow-rate even at low pressure for drinking water applications • Sustainable: Suitable for use in areas with no electricity, requires zero chemicals and does not generate waste water. "This technology can be applied to a number of drinking water applications including under-the-sink purification, post filtration for reverse osmosis (RO), a counter-top or pitcher unit or a unit internal to a refrigerator," said Snehal Desai, global business director for DW&PS. "The combination of DW&PS capabilities, scale and expertise with Ahlstrom's Disruptor technology is the right one to expand our product portfolio, which includes RO, IX, ultrafiltration, nanofiltration and fine particle filtration." … anD introDuces home ro membranes in two sizes Filmtec™ home drinking-water reverse-osmosis (RO) membranes were launched on 2 April 2013 by Dow Water & Process Solutions in 75 and 100 GPD (284 and 388 L/d) sizes. Dow says that the new Filmtec elements help remove contaminants that can lead to health risks, and reduce impurities such as calcium, magnesium, and iron. With a stabilized salt rejection rate of 99% at 75 GPD and 98% at 100 gallons per day, in standard sizes (1812 configuration), the BW60-1812-75 and TW30-1812-100HR elements offer premium water – faster. The new 75 GPD membrane uses new Dow membrane chemistries which have been customized to maximize element performance. The 75 and 100 GPD elements offer a balance of flow and high rejection, producing more water with 20% higher flow rates at standard test conditions. | 38 | Desalination & Water Reuse | May-June 2013 Victaulic launches flexible pipe coupling for ro At the Victaulic booth at the San Antonio membrane conference in early March, D&WR was given a preview of the Style 171 flexible composite pipe coupling, which was officially launched on 25 April 2013. The Style 171 is an engineered composite coupling for use where corrosive conditions exist. Ideal for reverse osmosis (RO) skids in vertical and horizontal installations, the Style 171 enables quick and simple installation and provides substantial gains in productivity. Featuring Victaulic installation-ready technology, the Style 171 eases and speeds installation. It does not require disassembly prior to installation; the coupling is simply pushed onto the pipe end as a fully assembled unit and tightened using standard hand tools. The coupling's design reduces labor hours to complete system installation, eliminates loose components that could be dropped or lost, and reduces installation clearance requirements. The Style 171 creates a flexible pipe joint, accommodating expansion, contraction and deflection in the piping system. The injection molded engineered composite housing offers corrosion and UV resistance, and is lighter than ductile iron and stainless steel couplings. The coupling can be used to join standard roll- or cut-grooved PVC and cut-grooved HDPE pipe. The coupling can also be used on stainless steel and FRP. The Style 171 is available in 1½-4 in (40-100 mm) sizes, and can withstand pressures of up to 150 psi (1,034 kPa), depending on pipe material and wall thickness. The Style 171 is supplied with the new Victaulic Grade E2 EPDM gasket, and is suitable for operating temperatures of 33-130ºF (1-54ºC). bwa to launch green antiscalant in miDDle east Flocon® 885, a biodegradable, phosphorus- and nitrogen-free antiscalant polymer for reverse osmosis was launched for the first time in the Middle East/Gulf region at the15th Annual Water, Energy, Technology & Environment Exhibition (WETEX) held on 15-17 April 2013 in Dubai, UAE. According to Dr Ian Hague, regional director - Middle East, for manufacturer BWA Water Additives, "Flocon 885 is a specialized organic material that is highly effective in controlling deposition of inorganic scale-forming salts on membrane surfaces. While there are many other membrane antiscalants on the market, Flocon® 885 is the only product that is readily biodegradable in both sea and fresh water conditions." BWA at WETEX additionally displayed its suite of products: Belgard® antiscalant and antifoulant proprietary polymers for thermal desalination systems; Belite® antifoams; Belclene® and Belcor® scale and corrosion inhibitors and Bellacide® microbiocides for industrial water systems; and Bellasol® scale inhibitors for the oil and gas industry.