QUA expands ultrafiltration module range

This smaller compact module offers greater flexibility when designing smaller filtration systems particularly for commercial customers as well for other customers where water demand is low. The company says that the Q-SEP 2008 is most suitable for applications in offices, hospitals and hotels, for example. Q-SEP 2008 is NSF certified.

Q-SEP 2008 is a self-encapsulated hollow fibre ultrafiltration membrane module (inside-out) with a membrane surface area of 20.0 square metres (215.27 square feet). The total length including end cap is 1015 mm, and the unit has a diameter of 225 mm (8.85 inches). The Q-SEP model 2008 module weighs 28 kg (61.39 lbs). As with other Q-SEP models, the 2008 module is mounted vertically.

Q-SEP Hollow Fiber UF modules contain UF membranes manufactured with QUA's ‘Cloud Point Precipitation’ method. The company adds that this process ensures a high pore density along the length of the fibre and uniform pore size distribution in the membrane. Q-SEP modules are claimed to offer good performance characteristics and product water quality that surpass the quality from conventional UF modules, with low silt density index (SDI) and excellent rejection of bacteria and viruses.

Q-SEP UF membranes are made from a hydrophilic polyether sulphone (PES) material that provides high fibre strength and excellent low fouling characteristics resulting in higher productivity. These hollow fibre membranes operate under low trans-membrane pressure in an inside-out flow configuration for superior performance. The fibres in the Q-SEP module are held firmly in place, which reduces the stress on the fibres even at high flow velocities. Uniform fibre packing limits the pressure drop variation within the module and prevents localised high fouling conditions. Unique end cap sealing design allows for high-pressure operation and ease of assembly.

Q-SEP UF modules can be used as dead-end filtration or in cross flow mode. The membranes are available with 0.8 mm ID fibres suitable for feed water with low turbidity and 1.2 mm ID fibres suitable to treat water with higher turbidity.

QUA adds that the advantages of Q-SEP UF over conventional media filtration include improved filtrate quality; SDI typically less than 1; removal of virus, bacteria and germs as well as microbiological and colloidal matter; improvement of downstream RO performance; and consistent treated water quality, irrespective of changes in feed water quality. In addition, Q-SEP eliminates the need to add coagulant chemicals for most applications. The Q-SEP ultrafiltration fibres and modules, like all QUA products, are manufactured in a state-of-the-art membrane manufacturing facility with continuous online monitoring to maintain consistent quality.

Applications of Q-SEP UF modules include pre-treatment to reverse osmosis (RO) systems (brackish and seawater applications), purification of surface and well water for potable applications, filtration of industrial water, and wastewater recycle and reuse.