Method and plant for biological treatment of aqueous...

Details Method and plant for biological treatment of aqueous... Method and plant for biological treatment of aqueous...

2007-10-02

2007-10-02

Prince, Fred G. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C210S623000, C210S197000, C210S259000, C210S908000

Reexamination Certificate

active

10500844

ABSTRACT:
The invention relates to a method for the biological treatment of effluents contaminated with impurities of urban or industrial origin, characterised in employing a single aeration tank (1) with a high mass charge in which the raw effluent or mechanically pre-treated effluent is mixed without previous decantation 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 O2/kg BOD5removed, the organic charge applied having a value equal to or greater than at least 2 kg COD/kgSM/day, preferably equal to or greater than 4 kg COD/kgSM/day, the hydraulic residence time for the raw effluent in the single aeration tank being between 30 and 90 minutes, preferably between 40 and 60 minutes.

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patent: 26 31 825 (1978-01-01), None
patent: 100 09 251 (2001-09-01), None

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