Process for the purification of groundwater

US5681476A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Gerda Grund · Coesfeld, DE
• John Kahsnitz · Haltern, DE

Key dates

• Filing date: Sep 18, 1995
• Grant date: Oct 28, 1997
• Expiry date: Sep 18, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/909
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Polluted groundwater is purified by separating off solids and adsorbing dissolved organic compounds to an adsorber resin. The adsorbed organic compounds are desorbed using steam and the adsorber resin is regenerated using an acid and an oxygen-containing gas. The process makes it possible to separate aromatic and halogenated hydrocarbons off of heavily polluted groundwater to the extent that the groundwater can be added to flowing surface water without reservation. The purified water can, if appropriate, be used as cooling water, or after further biological purification, as drinking water.