Patent ID: 9452938
Filing Date: 2016-09-27
CPC Classification: B01D,C01C,C02F,C05C,C05F,Y02A,Y02C,Y02E,Y02W

Claim Text:
1. An ammonia capture recovery system for a pre-processed wastewater solution permeate having NH 3 —N, comprising: a source of a pre-processed wastewater solution permeate having NH a degasser, the degasser receives the wastewater solution permeate and removes carbon dioxide from the wastewater solution permeate, a concentration tank and an alkali source, the concentration tank receives the wastewater solution permeate from the degasser and alkali is added to the concentration tank and resulting high pH of the wastewater solution permeate converts ammonium to ammonia to form a reacted permeate a hydrophobic membrane concentrator, the hydrophobic membrane concentrator comprising a plurality of hydrophobic membrane modules with all acid sides of the modules connected in series to define a continuous acid-side stream, a permeate feed line that divides a flow of the reacted permeate via a plurality of permeate lines that are each delivered to a separate hydrophobic membrane module, an acid source having a plurality of acid supply lines that are each delivered to a separate acid-side input of each hydrophobic membrane module to maintain the acidity of the continuous acid-side stream, and a saturated product tank; and a process water tank receiving a low ammonia effluent pumped from the hydrophobic membrane concentrator, wherein acid pumped into the hydrophobic membrane concentrator reacts with ammonia transferred across each membrane module from the reacted permeate to form a saturated ammonium product in the acid-side stream that is transferred to the saturated product tank.