MICROSCREENING IN SEWAGE TREATMENT

Abstract

Mlicroscreening represents an alternative advanced (tertiary) sewage treatment process concerning rapid sandfiltration. Microscreening can be considered as a mechanical process, for it is a filtration through a thin screening cloth. The retained suspended matter creates a contacting film cover that should be removed by flushing. The efficiency of microscreening is influenced by the concentration and material characteristics of suspended solids, the mesh size of the screen and the hydraulic load. The automatic microstrainer can be operated continuously. The process of removal of suspended solids in the microstrainer can be interpreted with the filtrability index (I) by experimental way.