:: Welcome to Rochem Separation System ::

Ultrafiltration and Microfiltration are based on porous membranes. Particles larger than the pore size of the membranes are rejected. In practice even smaller particles are rejected because of the selectivity of the filter cake (gel layer) on the membrane surface. A gel layer can not be avoided in dead-end operation and is observed in most cross flow applications. Ultrafiltration membranes form an absolute barrier for bacteria and viruses ROCHEM-FM modules (Flat-Membrane) have been developed especially for the separation of bacteria, viruses and fine solids from water and wastewater with a high fouling potential. Most Important the modules exhibit low specific energy consumption at high and steady-state. Unique is the possibility of an optimal adaptation of the free path feed side cushions) to the individual case. This feature allows the application in a wide range of solid concentrations, The patented concept of a membrane cushion stack with completely open feed channels ( no spacers or support plates) in combination with the straight-through feed flow combines the advantages of common tube and plate/frame systems. The vertical placement of the modules in combination with a feed side air/water flushing allows membrane cleaning and a stable operation for long periods without use of chemical cleaning agents. In addition the wide spectrum of commercially available flat sheet membranes for Ultra-filtration (UF), microfiltration (MF) and nanofiltration (NF) allows the optimal selection of a membrane for each individual application.