PROCEDE POUR TRAITEMENT DES EAUX RESIDUAIRES PROVEMANTES DES INSTALLATION DES ENGRATS

摘要

A continuous process for treating a fertilizer plant waste aqueous stream containing ammonium, hardness metal and nitrate values to recover an ammonium nitrate fertilizer and a demineralized and substantially nitrate-free aqueous stream for recycle includes initially removing the ammonium ion and hardness metal ion values from the fertilizer plant waste aqueous stream with a cation exchange resin bed and then contacting the essentially ammonium and hardness metal ion-free aqueous stream with an anion exchange resin bed to recover a second ammonium nitrate fertilizer stream and a demineralized and nitrate-free aqueous stream.