REMOVAL OF NITROGEN BY ION EXCHANGE involves a utilization of zeolites for the elimination of N-contents from a contaminated water.
NH4+-N2 can be eliminated from this technique very effectively. Different materials are present to remove nitrates from the water. Actually, these resins attach the ions present in the waste water resulting in the purification of that water. Some resins are accessible which has an ability to selectively attach NO3-1 with them from WW. Anion material removes the nitrates ions from the waste water. According to a study tributyl amine based and trimethylamine based resin are examined. They were both tested for their removal efficiency of nitrogen contents (NO3-1). The results obtained were unanimous as ninety percent of NO3-1 were eliminated from the waste water. Also, this technique is quite easy to operate. Especially, the resin used in this technique can also be regenerated if it had exchanged all of its ions with water. NaCl is regenerating material which is readily and cheaply available. The output stream after a process of regeneration of resin is forwarded towards the septic tank in which NO3-1 has been transformed into N2 & O2 in an environment having a bacteria. The methods that have been utilized for an elimination of NO3-1 wants filtration prior to the processing for an elimination of extra Cl2 exists in a WW. It will be beneficial for the prevention of resin bed from oxidation as well as fouling. 
By using IE method (zeolites) N2 removal efficiency can be attained in the range of 16.2-93.8 percent. Though, a disadvantage of the IE method is a very much fluctuations in the working parameters of the process. The very much care is needed for utilizing this method for e.g., it should be maintained with a great care & time to time replacement of zeolite bed should be done. That’s why, it is not a consistent method as a very much care is needed. WW should be processed prior to enter in a zeolite bed. Thus, cost of processing prior to enter in zeolite bed & replacement of zeolites on exhaustion makes this technique expensive for WWTP. 
This is the brief introduction of REMOVAL OF NITROGEN BY ION EXCHANGE. Now, we will discuss our conclusion of waste water treatment techniques.