Oxidation method, nozzle system and sewage treatment plant

US6139755A · kind A · utility

Inventors

• Walter Marte · Ulisbach, CH
• Martin Meyer · Kürten, DE
• Ulrich Meyer · Ibbenbüren, DE

Key dates

• Filing date: Mar 23, 1999
• Grant date: Oct 31, 2000
• Expiry date: Mar 23, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S261/75
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The invention relates to a method for oxidizing substances contained in sewage, a nozzle system, and a plant for carrying out this method. The method is characterized in that three radical chain circuits are superimposed, thus producing a continuous reaction chain which is maintained by incorporating a radical starter, a catalyst and oxygen into the sewage flow. The reaction is characterized in that the reaction partners are brought together via a nozzle system which creates unsteady flowing conditions. To reduce operational costs, the sewage is fed by the nozzle system to the autothermic reactor via a heat exchanger which is heated by the treated sewage flow. The method is characterized by its flexibility in treating different kinds of sewage flow of different concentrations. The advantages are, above all, the following: reduced sludge production, high biocompatibility of the residues to be transported, and low consumption of chemical substances. These advantages, combined with the autothermic nature of the reaction and the high degree of efficiency, result in an economic procedure for waste disposal.