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Emeryville, CA -- New Logic has completed several surface and well water facility installations using this vibrating membrane system for treatment to produce ultra-pure water. The results have demonstrated many advantages of this new membrane technology when compared to the conventional treatment methods. This new membrane system is know as VGSEP which is an acronym for Vibratory Shear Enhanced Process.
VGSEP Treats River Water
New Logic installed its Vibratory Shear Enhanced Processing (VGSEP) in July, 1997 at a major international electronic disk manufacturing facility at Hokkaido Island in Northern Japan. The VGSEP system is used for treatment of river water for ultra-pure water production at this facility. The VGSEP system uses an ultrafiltration membrane module and is able to treat river water in order to remove or reduce humic substances, color, turbidity, permanganate consumption and total iron to below the required limits.
The application of VGSEP membrane technology to treat river water for ultra-pure water production at electronic disk fabrication facility was found to be an attractive economic alternative to the conventional sand filter water treatment technology. Concentration of the raw river water ranges from 5 to 10 mg/L of TSS. Permeate from the VGSEP has less than 1 mg/L TSS. VSEP also reduced color from 67 color units to less than 1 color unit, from 2 NTU turbidity to less than 0.1 NTU, and from 0.1 mg/L Iron to less than 0.05 mg/L of total Iron.
Commercial Drinking Water Case Study
New Logic has installed a nearly 1 Million Gallon per day water filtration system. The filtrate from this system is purified and disinfected using an Ultrafiltration membrane and then sent on to the bottling process where it becomes a consumer product for consumption.
In this case, aesthetic improvement was the goal due to a large number of taste complaints. Reduction of TOC causing poor taste has been effectively reduced by the use of a 30,000 mwco UF membrane. One other benefit of the filtration is the near complete removal of all bacteria and other organisms. Normally, Microfiltration could be used with higher throughput per SF of membrane, but in this case TOC reduction called for the use of a UF membrane. The previous system design consisted of a Multi Media filter feeding a Carbon filter.
Normal operation involved frequent recharging or disposal of the Carbon media. In addition the water quality led to numerous taste complaints. The addition of VGSEP to the process improves taste, reduces TOC, and allows the Carbon filters to run trouble free.
The permeate contains about ~ 1 mg/L of total suspended solids (TSS), and a low level of total dissolved solids (TDS), all well below the standards for drink water. Membrane selection is based on material compatibility, flux rates (capacity) and permeate quality requirements. In this example, the TSS reduction is over 99%.
Summary
New Logic Research has supplied VGSEP separation technology successfully into many industrial processes. The availability of new membrane materials and VGSEP technology make it possible to economically treat commercial and domestic drinking water.
For additional information visit: http:/www.vsep.com/
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