Patent ID: 7276165
Filing Date: 2007-10-02
Classification: C02F,Y02W,Y10S

Abstract:
1. A method for the biological treatment of effluents contaminated with impurities of municipal or industrial origin, comprising the steps: filling a single aeration tank with high mass loading in which raw or mechanically pretreated effluent is mixed, without prior settling, with a free microbial culture of the activated sludge type, growing in a lightly aerated medium, of the order of 0.1 to 0.2 Kg O the applied organic loading being equal to or greater than 4 Kg COD/Kg SM/day, the hydraulic residence time of the raw effluent in the single aeration tank being between 40 and 60 minutes, a portion of dissolved carbon pollution and nearly the entire colloidal and particulate fraction of the effluent in the tank being biosorbed by activated sludge floc.