Our 3M™ Liqui-Cel™ Membrane Contactors transfer gases to and from compatible liquid streams. In the Transmembrane Chemisorption (TMCS) process. Ammonia gas is stripped from wastewater streams with a high concentration of ammonia, diffuses across the wall of a hollow fiber membrane, and is directly absorbed into a reactive acid solution. This makes simultaneous removal and recovery of ammonia possible in a single device.