Process for purifying waste water

US4663047A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Edmund Krauthausen · Cologne, DE
• Friedrich Schmidt · Wuppertal, DE

Key dates

• Filing date: Sep 20, 1985
• Grant date: May 5, 1987
• Expiry date: Sep 20, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The purification process is carried out in two stages. In the first stage, pulverulent active carbon in finely-divided form is added to the waste water. The solids materials are then separated by conventional mechanical separating processes. The liquid phase prepurified in this manner is then allowed to trickle in a second stage through an active carbon adsorption tower, air being forced at the same time through the adsorption tower. The process has proved particularly valuable in the purification of pesticide-containing waste water.