Process of removing phosphorus and suspended matter from waste water

US5154830A · kind A · utility

Assignee

• Passavant-Werke AG · DE

Inventors

• Ulrich Paul · Heusenstamm, DE
• Willi Schaper · Frankfurt am Main, DE
• Carl-Adolf Eschenbach · Königstein, DE
• Karl Seel · Katzenelnbogen, DE
• Hubert Coenen · Essen, DE

Key dates

• Filing date: Apr 25, 1991
• Grant date: Oct 13, 1992
• Expiry date: Apr 25, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/906
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Phosphates which are dissolved or contained in suspension are substantially completely removed from a low-solids waste water which has been clarified. Precipitating and flocculating agents for transforming the dissolved phosphated to an undissolved form are added to the low-solids wate water and precipitation products and suspended matter are removed by microsieving through mesh openings in the range of about 10 to 150 .mu.m. Microsieving is preferably effected in two stages including a preliminary sieving through mesh openings from 60 to 150 .mu.m and a fine sieving through mesh openings from 10 to 80 .mu.m.