In the composting process ammonia develops from the decaying of organic matter. A small amount of ammonia also comes from fertilizers, waste disposal sites and industrial processes. Ammonia is widely used in the Chemical Industry as a cleaning and bleaching agent in the production of fertilizers, plastics, and explosives just to name a few. As a result, large quantities of wastewater containing ammonia are produced and many industries now have to treat the wastewater to remove the ammonia so that it is not discharged back into the environment.

Ammonia in wastewater is present as ion where pH is neutral. Ammonia is separated as gas from wastewater by raising pH of water with alkaline addition. Increasing the operating temperature enhances separation.

In the usual commercial process of separating ammonias, the gases are passed through a sulphuric acid solution to cause a reaction between the acid and the ammonia in the gas, resulting in precipitation of ammonium sulphate crystals, which sink, to the bottom of the solution. A sludge of ammonium sulphate crystals and acid solution is then removed, the excess solution drained off, and then the ammonium sulphate crystals are dried in a Atmospheric Double Dryer Drum to remove as much of the acid solution as possible.

Provides either ammonia recovery process or ammonia decomposition process, determined by the amount of ammonia contained in steam at top of the stripper, or benefits of its recovery.