Ammonium/ammonia removal from a stream

Details Ammonium/ammonia removal from a stream Ammonium/ammonia removal from a stream

2007-09-18

2007-09-18

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C210S649000, C210S681000, C210S687000, C210S688000, C210S702000, C423S356000, C423S357000

Reexamination Certificate

active

11203035

ABSTRACT:
In one embodiment, an ammonium removal method can comprise: removing a multivalent cation from a stream comprising ammonium to form a treated stream; converting the ammonium in the stream to ammonia by increasing the pH of the stream; and separating the ammonia from the treated stream to form a separated stream and gaseous ammonia. In another embodiment, an ammonium removal method can comprise: a multivalent cation from a stream comprising ammonium to form a treated stream comprising a total of less than or equal to about 50 ppm by weight of multivalent cations; increasing the pH of the stream to a conversion pH; converting the ammonium to ammonia; and separating the ammonia from the treated stream to form a separated stream and gaseous ammonia.

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