Process for reducing sludge derived from the treatment of wastewater by oxygenation and mechanical action

US7147780B2 · kind B2 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Philippe Campo · Montigny-le-Bretonneux, FR
• Jerome Cluzeau · Ljubljana, SI

Key dates

• Filing date: Dec 17, 2004
• Grant date: Dec 12, 2006
• Expiry date: Dec 17, 2024

Classification

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

Abstract

A method for reducing the production of sludge derived from the treatment of wastewater. The sludge is subjected to a mechanical action in the presence of a gas containing oxygen. The mechanical action is performed in such a way as to destroy the cell walls of between 5% and 80% of the microorganisms present in the sludge.