Deamination membrane deamination technology is a new technology combining absorption and membrane separation. (1) adjust the pH, so that the wastewater ammonia nitrogen as far as possible into free ammonia (gaseous); (2) deamination membrane (hydrophobic, porous membrane) will be wastewater (tube course) and sulfuric acid (shell course) completely separated, the membrane pore as the interface for mass transfer; (3) wastewater in the free ammonia through the membrane pore (the impetus is the difference in ammonia differential pressure between the two sides of the membrane), on the other side of the membrane and sulfuric acid contact and reaction, to realize the deamination.