Patent ID: 6013512
Filing Date: 2000-01-11
Classification: B01D,C12N,Y02A

Abstract:
A method for removing ammonia from a waste gas stream, said method comprising the steps of:providing an aqueous suspension containing microorganisms, said aqueous suspension being held in a biomass chamber;circulating said aqueous suspension through an adsorption tower;contacting a waste gas stream containing ammonia with said aqueous suspension within said absorption tower, said waste gas stream and said aqueous suspension flowing through said absorption tower countercurrently, said aqueous suspension removing said ammonia from said waste gas stream, said microorganisms contained within said aqueous suspension converting said ammonia to nitrates; andcontacting said waste gas stream with a scrubbing fluid in a washing chamber prior to said waste gas stream entering said absorption tower, said scrubbing fluid removing portions of said ammonia from said waste gas stream, said scrubbing fluid being fed to said biomass chamber for degradation of said ammonia in said scrubbing fluid by said microorganisms.