Activated sludge system with integrated regenerator

US4521311A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Uwe Fuchs · Munich, DE
• Alfred Wildmoser · Haar, DE

Key dates

• Filing date: Jul 29, 1983
• Grant date: Jun 4, 1985
• Expiry date: Jul 29, 2003

Classification

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

Abstract

In the treatment of wastewater, the mixture of wastewater and the sludge is transported through a treatment zone, and then through a filter zone containing a bed of support particles, e.g., particles of polyurethane foam, to deposit the biomass onto the support particles. The loaded support particles are subsequently regenerated within the filter zone by means of a regenerating means in the same area as the filter zone, e.g., by strong aeration or by being compressed between press-rolls, whereby the system requires neither additional land for regeneration of the support particles nor a secondary settling tank.