Water purification process

Details Water purification process Water purification process

1976-03-29

1978-07-04

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 30R, 210 38R, 210DIG28, C02C 508, C02C 510

Patent

active

040986900

ABSTRACT:
A process for treating wastewaters to reduce the ammonia content thereof comprising the steps of:
A. contacting wastewater, having a dissolved ammonia content, with an ion exchanger having an affinity for ammonium ions whereby ammonium ions become sorbed onto said ion exchanger;
B. separating said ion exchanger containing sorbed ammonium ions from the wastewater and then regenerating said ion exchanger and converting the ammonium ions thereon to nitrate ions by treating the ion exchanger with a concentrated salt solution and a culture of nitrifying bacteria whereby ions from the salt solution become absorbed onto the ion exchanger while ammonium ions on the ion exchanger are displaced into solution and oxidized by the nitrifying bacteria to nitrate ions; and,
C. recycling the regenerated ion exchanger for further contact with wastewater.

REFERENCES:
patent: 3723308 (1973-03-01), Breck
patent: 3846289 (1974-11-01), Jeris et al.
patent: 3929600 (1975-12-01), Hiasa et al.

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