Method for the purification of waste water, notably of urban was

Liquid purification or separation – Processes – Treatment by living organism

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210622, 210624, 210903, C02F 330

Patent

active

047879785

ABSTRACT:
A method for the treatment of activated slurries of waste water, notably of urban waste water, characterized in that the water to be treated, previously subjected to the standard prior treatments such as screening, renewal of sediments, degreasing, and possibly a primary decantation, is directed to a single ventilation or aeration basin with a high mass load where it dwells during a reduced period, from which it is discharged to a clarifier-thickener equipped with inclined parallel plates or tubes, stimulating the separation of the slurry, which is being recycled in the ventilation or aeration basin at a high concentration made necessary by the reduced dwelling time of the water in the basin.

REFERENCES:
patent: 4067801 (1978-01-01), Ishida et al.
patent: 4076615 (1978-02-01), Olesen et al.
patent: 4134830 (1979-01-01), Skogman et al.
patent: 4267050 (1981-05-01), Conway et al.
patent: 4452699 (1984-06-01), Suzuki et al.
patent: 4491522 (1985-01-01), Ishida et al.

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