C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
182/3
C02F 1/42 (2006.01) A01K 63/04 (2006.01) B01J 39/14 (2006.01) B01J 47/10 (2006.01) B01J 49/00 (2006.01)
Patent
CA 1256384
ABSTRACT A continuous process for removal of ammoniacal nitrogen from water is disclosed. This process is useful for maintaining water quality in aquaculture operations, e.g., fish hatcheries and the like. A particulate stream of zeolitic ion exchange material is circulated continuously through an exchanger and a regenerator. An aqueous process stream containing ammoniacal nitrogen, e.g., ammonia, is passed through the exchanger in continuous counter current liquid-solid contact with a stream of particulate, ammoniacal nitrogen-sorbing zeolitic ion exchange material of natural or synthetic origin. A treated liquid water stream having a reduced ammoniacal nitrogen content exits from the exchanger, as does a stream of ammoniacal nitrogen-enriched particulate zeolitic ion exchange material. The latter stream is regenerated in the regenerator at a temperature of about 350°C. to about 650°C. while an oxygen-containing gas stream, e.g., air, is passed in continuous counter current gas-solid contact therewith. Gases emanating from the regenerator are used to preheat the ammoniacal-nitrogen enriched particulate material that enters the regenerator. The regenerated stream of particulate, ammoniacal nitrogen-sorbing zeolitic ion exchange material is recycled to the exchanger.
479297
Ates - Advanced Technical Engineering Systems Ag
Ridout & Maybee Llp
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