Process for treating waste water oxidation ponds to abate malodo

Details Process for treating waste water oxidation ponds to abate malodo Process for treating waste water oxidation ponds to abate malodo

1992-11-13

1995-02-07

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210621, 210908, 95273, C02F 306

Patent

active

053873440

ABSTRACT:
A process and an apparatus for treating waste water in oxidations ponds, oxidation ditches, or other bodies of water in a waste water treatment facility to abate the malodors caused by the presence of volatile contaminants. In the process, a water stream is withdrawn from the body of waste water and contacted with an air stream in an air-water contact apparatus. The water stream is thereby aerated and stripped of potentially odor causing volatile contaminants and an off-gas stream is produced containing the stripped volatile contaminants. At least a portion of the aerated and stripped water stream is returned to the body of waste water to inhibit anaerobic decomposition of organic impurities. The off-gas stream is passed through a fixed bed type biofilter comprising a porous filter bed provided with appropriate microorganisms so that the volatile contaminants in the off-gas stream come into contact with the microorganisms and are biologically metabolized into environmentally innocuous substances rather than being emitted into the ambient air.

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patent: 5246584 (1993-09-01), Donaldson et al.
patent: 5259868 (1993-11-01), Doubrawa et al.

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