Process for treatment of sewage in a gravity sewer

Details Process for treatment of sewage in a gravity sewer Process for treatment of sewage in a gravity sewer

1976-06-22

1979-04-10

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 15, 210170, 210199, C02C 112

Patent

active

041487265

ABSTRACT:
Pure oxygen or a gas containing more oxygen than air is injected under pressure into sewage held in or flowing through a sewer. This injection can be used to prevent the concentration of dissolved oxygen in the sewer falling to a level at which there occurs bacterial reduction to hydrogen sulfide of sulfate present in the sewage. The injection can also be used to oxidize to sulfur any sulfide dissolved in the sewage.
The pure oxygen or the gas containing more oxygen than air may be injected into sewage flowing through a sewage pipe forming part of a gravity sewer, into a pump used to transfer the sewage through the sewer, or into a part of the sewer where sewage is collected before being transferred through the sewer.

REFERENCES:
patent: 1371406 (1921-03-01), Ball
patent: 1963354 (1934-06-01), Currie
patent: 3335082 (1967-08-01), Ullrich
patent: 3342729 (1967-09-01), Bringle
patent: 3470091 (1969-09-01), Budd et al.
patent: 3525685 (1970-08-01), Edwards
patent: 3607735 (1971-09-01), Hover
patent: 3664951 (1972-05-01), Armstrong
patent: 3731522 (1973-05-01), Mikesell
patent: 3826742 (1974-07-01), Kirk et al.
patent: 3872003 (1975-03-01), Walker
Process Design Manual for Sulfide Control in Sanitary Sewerage Systems, EPA, Oct. 1974, pp. 5-24-5-26.

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