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US 9,174,850 B2Granted
Gaseous ammonia removal method
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsAriel A Szogi, Matias B Vanotti, Michael J Rothrock
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Abstract
A system and method for passive capture of ammonia in an enclosure containing material that gives off ammonia. The invention allows for the passage of gaseous NH3 through microporous hydrophobic gas-permeable membranes and its capture in a circulated acidic solution with concomitant production of a concentrated non-volatile ammonium salt.
Claims13
A method for producing ammonium salt from an enclosure, comprising:
- capturing ammonia gas within the confines of a membrane assembly having a gas-permeable membrane, said gas generated substantially from material containing ammonium,
- contacting said ammonia gas with an acid solution in said membrane assembly wherein said acid is in fluid communication with said gas to produce ammonium salts;
- and
- transporting the salts for collection to a reservoir in fluid communication with said membrane assembly.
1 more element
Dependencies are inferred from the claim text.