Process and system for treating waste water

Details Process and system for treating waste water Process and system for treating waste water

1975-10-06

1978-02-28

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 6, 210 17, 210 18, 210 39, 210 45, C02C 504

Patent

active

040766152

ABSTRACT:
A process of treating raw or primary waste water using a powdered, activated carbon/aerated biological treatment system is disclosed. Effluent turbidities less than 2 JTU (Jackson turbidity units), zero TOC (total organic carbon) and in the range of 10 mg/l COD (chemical oxygen demand) can be obtained. An influent stream of raw or primary waste water is contacted with an acidified, powdered, activated carbon/alum mixture. Lime is then added to the slurry to raise the pH to about 7.0. A polyelectrolyte flocculant is added to the slurry followed by a flocculation period -- then sedimentation and filtration. The separated solids (sludge) are aerated in a stabilization sludge basin and a portion thereof recycled to an aerated contact basin for mixing with the influent waste water stream prior to or after contact of the influent stream with the powdered, activated carbon/alum mixture.

REFERENCES:
patent: 3244621 (1966-04-01), Bouthilet
patent: 3442798 (1969-05-01), Schoeffel et al.
patent: 3480144 (1969-11-01), Barth et al.
patent: 3516932 (1970-06-01), Hedrick et al.
patent: 3673083 (1972-06-01), Sawyer et al.
patent: 3728253 (1973-04-01), Kaufman
patent: 3767570 (1973-10-01), Clapp
patent: 3803029 (1974-04-01), Blecharczyk
patent: 3876536 (1975-04-01), Prodt et al.
patent: 3904518 (1975-09-01), Hutton et al.

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