Consistent with Executive Order 13777, the U.S. Environmental Protection Agency announced it is seeking public input on existing regulations that...
Fractional electrodeionization and ultrafiltration membranes featured at booth #1150
QUA, a developer of advanced membrane products for water and wastewater treatment applications, will showcase two high performance membrane products – FEDI fractional electrodionization and Q-SEP hollow-fiber ultrafiltration (UF) modules – at booth #1150 at WQA Aquatech USA 2012.
QUA recently received NSF/ANSI 61 certification from NSF Intl. for the manufacture of its Q-SEP range of hollow fiber UF modules. NSF/ANSI Standard 61 certification is for Drinking Water System Components – Health Effects, the recognized health effects standard for all devices, components and materials that contact drinking water.
“QUA is committed to ongoing innovation in water treatment technologies, exceptional product performance and the highest quality standards in all aspects of our organization. We bring a consultative approach to help clients find the best solution for their needs. This is in line with our goal to create long term relationships with our customers and strategic partners around the world,” said Jim Dobos, vice president, North American operations.
With patented dual voltage technology, QUA’s FEDI (fractional electrodionization) technology is next-generation EDI technology for the production of high-purity water. Developed taking into account the limitations of conventional EDI, FEDI improves the reliability of EDI for the production of high-purity water for power and semiconductor applications. Unlike conventional EDI, FEDI stacks are able to tolerate hardness in the feedwater. As a result, FEDI can be used after single-pass reverse osmosis (RO) without the need for softening, or second pass RO, on most feedwaters.
Each FEDI stack is equipped with two sets of electrodes. FEDI’s dual-voltage technology allows for a higher flexibility to inlet water conditions, thus lowering the risk of scaling and improving reliability. Hardness and the majority of the other ions are removed in the bottom of the stack at low current density and low scaling conditions, while the final product water polishing takes place in the top of the stack at high current density.
Q-SEP hollow-fiber UF modules contain UF membranes manufactured with QUA’s Cloud Point Precipitation method. This process ensures a high pore density along the length of the fiber and uniform pore size distribution in the membrane. Q-SEP modules deliver superior performance characteristics and produce water quality that surpass the quality from conventional UF modules, with low silt density index and excellent rejection of bacteria and viruses.
Q-SEP UF modules are made from a hydrophilic polyether sulfone material that provides high fiber strength and excellent low fouling characteristics resulting in higher productivity. These hollow fiber membranes operate under low transmembrane pressure in an inside-out flow configuration for superior performance. Applications of Q-SEP UF include pretreatment to RO systems (brackish and seawater applications), purification of surface and well water for potable applications, filtration of industrial water, and wastewater recycling and reuse.