AMMONIA CAPTURE RECOVERY SYSTEM

摘要

An ammonia capture recovery system is disclosed. The ammonia capture recovery system may include pretreatment with conventional solid removal devices and a single or a series of hydrophobic membrane concentrators receiving a heated ammonium containing influent either heated to a sufficient temperature to convert ammonia to ammonium or containing sufficient alkali to convert ammonia to ammonium in the influent. The heated ammonium containing liquid is pumped through the hydrophobic membrane concentrator and the hydrophobic membrane concentrator receives an acid. The acid then reacts with the extracted gaseous ammonia and ultimately forms a saturated ammonium salt product that is discharged from the hydrophobic membrane concentrator, the hydrophobic membrane concentrator includes a feed line, a plurality of hydrophobic membrane modules, a diluted acid source and a concentrated acid source and tanks to receive the saturated ammonium salt product and the low ammonia effluent.

主权项

1. An ammonia capture recovery system, comprising:
a pre-processed wastewater solution permeate having NH3—N and a low solids concentration, the permeate is pumped to a degasser, the degasser removes carbon dioxide from the wastewater solution, the wastewater solution is transferred to a concentration tank, where an alkali is added to the concentration tank and resulting high pH of the wastewater solution converts ammonium to ammonia and the reacted permeate is transferred to a hydrophobic membrane concentrator, the hydrophobic membrane concentrator receives an acid from an acid source, the acid is pumped into the hydrophobic membrane concentrator and reacts with the ammonia transferred across the membrane from the permeate to form a saturated ammonium product, the saturated ammonium product is transferred from the hydrophobic membrane concentrator to a product tank, the hydrophobic membrane concentrator includes a feed line, a plurality of hydrophobic membrane modules, a concentrated acid source and the saturated product tank; and a process water tank receiving a low ammonia effluent pumped from the hydrophobic membrane concentrator.