REVIEW ON WASTEWATER TREATMENT TECHNOLOGIES FOR NITROGEN REMOVAL

ABSTRACT:-Wastewater released from various industries is the major concern for the environmentalists now a day. The removal of nitrogen from wastewater has become an important part of the treatment process due to its significant impact on the environment, human health and the more stringent legislation on wastewater discharges. Because of the wide range of nitrogen constituents in industrial discharges, the approach to control these discharge utilizes a wide range of technologies. Among which biological treatment processes takes the advantage of the ability of microorganisms to use diverse wastewater constituents to provide the energy for microbial metabolism and the building blocks for cell synthesis. This review summarizes the recent studies dealing with wastewater treatment concepts based on AOB (ammonium oxidizing bacteria) and anammox bacteria such as SHARON (single reactor system for high ammonia removal over nitrite), ANAMMOX (anaerobic ammonium oxidation), CANON (completely autotrophic nitrogen removal over nitrite) and OLAND (oxygen-limited autotrophic nitrifying-denitrifying) for the treatment of high strength nitrogen wastewater