Wastewater Screens : Ultra-Fine Screens

Products Ultra-Fine Screen RoMem® ROTAMAT® Ultra-Fine Drum Screen RoMesh® Rotary Mesh Screen RoDisc® ROTAMAT® Pipestrainer PS

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	The need for ever finer screens

New challenges in the field of wastewater treatment require ever finer screening technology. Hollow fiber membranes that are used in bio-membrane reactors are negatively affected by hair and fibers.

Ultra-fine screening is also needed for industrial applications. The screens are used for pre-treatment of industrial effluents. Product recovery can also be the objective of their use.

Another example are river and sea outfalls in developing countries where the wastewater is only mechanically treated. For the protection of the receiving waters it is necessary to further reduce the COD/BOD freight of the thus discharged wastewater. With reasonable costs the environment can be protected by installation of finer screens. Ultra-fine screens have an excellent benefit to cost ratio.

The efficiency of ultra-fine screens can be further improved by prior chemical precioitation, coagulation and flocculation. Dissolved pollutants and colloidal particles are tranbsformed into larger particles or flocs. After chemical pre-treatment ultra-fibe screens can remove up to 95% of suspended solids, up to 65 % of COD and BOD, and up to 60 % of phosphorus.

Millions of people die every year from dysenery diseases such as cholera and typhus that are transmitted through polluted water. Installation of ultra-fine screens offers an affordable and quick improvement for regions where drinking water is scarce and sanitation insufficient.