Standard ATV-A 203E Wastewater Filtration Using Space Filters following by Biological Treatment

This Standard is concerned with communal wastewater. Essentially, the procedures for wastewater filtration aim at the elimination of particular wastewater content substances ( filterable substances) following biological treatment in accordance with the recognised rules of technology. With regard to their function the following well tried methods can be differentiated: - wastewater filtration which is limited exclusively to the elimination of filterable substances present in the wastewater; - flocculation filtration by which additional filterable substances are produced by means of the addition of precipitation/flocculation agents and/or flocculation aid agents, preferably with the aim of advanced phosphorus elimination, and - biologically intensified filtration which, with the aid of suitable filter materials and sufficient oxygen supply aims additionally at the reduction of the organic residual loading of the wastewater and, in certain cases, at a residual nitrification.