Short review on membrane distillation techniques for removal of dissolved ammonia

When ammonia discharged into water resources, it has a negative effect on aquatic life as a major water pollutant. Therefore, removing of ammonia from wastewaters has become an essential need for last decades concurrent with developing in the industry and agriculture. Hence there are emerged various techniques for removing the solvated ammonia which among them membrane distillation (MD) is the powerful technique for wastewater treatment. In the thermally process of membrane distillation, only volatile molecules are transferred through hydrophobic membrane. The microporous membrane is a barrier for separation of permeate (cool side-liquid or gas phase) from feed (hot side-liquid or gas phase). The vapor pressure gradient is a propulsion force for migration volatile molecules into the permeate side. In this short review paper, we summarized the surveys about membrane distillation techniques in removal of solvated ammonia.