Abstract: A process for removing inorganic and/or oxidizable nitrogen compounds from industrial effluent. The nitrogen compounds in the effluent can be simultaneously recovered for use in production processes. The method for eliminates inorganic nitrogen compounds from wastewater, by neutralizing wastewater with a neutralizer to a pH of approximately 7 to obtain a neutralized solution. The neutralizer is a sodium hydroxide solution or ammonia. Next the neutralized solution is evaporated. The inorganic nitrate compounds present in the inorganic nitrogen compounds are eliminated from the wastewater in the form of the corresponding neutralized nitrate.