primary treatment Benennung

DefGEMET: Removal of floating solids and suspended solids, both fine and coarse, from raw sewage. (Source: MGH)

"primary treatment" means treatment of urban waste water by a physical and/or chemical process involving settlement of suspended solids, or other processes in which the BOD5 of the incoming waste water is reduced by at least 20 % before discharge and the total suspended solids of the incoming waste water are reduced by at least 50 %; (Council Directive 91/271/EEC ... concerning urban waste-water treatment; WWW20180620 https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:31991L0271&from=EN)