Ultrafiltration (UF) is a membrane process suitable for removing or reducing solids, microorganisms, turbidity and suspended solids. Pathogens can hide in such turbidity substances and thus escape most disinfection measures. After their removal, a subsequent disinfection, preferably with an UV system, can be carried out. Ultrafiltration thus makes an important contribution to the production and protection of drinking water.
JUDO PURE@ENTRY ultrafiltration systems combine this proven process with numerous other advantages. The systems are modular in design and available in different sizes. They can thus be easily adapted to different requirements in terms of performance and water quality. They can be used to treat well water, surface water, brackish water and even sea water. They can also be used as pre-treatment for other processes such as reverse osmosis: PURE@ENTRY makes the operation of those systems more economical and safer.
JUDO ultrafiltration systems are designed for fully automatic operation. The control system regulates the various operating cycles such as filtration and rinsing.
For reasons of water saving, the filtration itself is carried out in so-called dead-end operation: Here, the water is pressed at about 3 bar through hollow fibre bundles closed at the end. Pure water passes through the membrane, while bacteria, turbidity and dirt particles stay behind. In order to remove the dirt, cleaning/rinsing must be carried out at regular intervals. The running time between two rinses is between 30 and 120 minutes, depending on the water’s contamination degree. If the running time is shorter, a further filtration stage must be installed upstream, for example a multi-layer filter. Flushing is automatically triggered by time interval and/or differential pressure. It lasts about 40 to 60 seconds; the water supply can be maintained by means of a buffer tank.