Advantages of Cleartec© over rigid fixed bed systems
In competition with other IFAS systems, Cleartec © is facing amongst many technologies the rigid fixed bed e.g. the grid structure made of PE. These systems often promise similar results as Cleartec© but only achieve them for a limited time. Due to the rigid structure, scouring of sludge by rising air bubbles is not as uniformly possible as with flexible textiles. As a result, areas with strong blockages that hinder proper flow and other areas with strong flow develops over time. Gradually, the effective aerobic surface of the fixed bed becomes smaller and the "inactive sludge mass" in the system increases. In addition, anaerobic conditions are establishing in the highly blocked areas. Therefore the degradation efficiency and process stability decrease.