Research Of Two Stages Of Anaerobic Dispose Organic Nitrogen Wastewater And Remove Ammonia

The composition of industrial wastewater which contain organic nitrogen wasvery complicated. The decomposition of organic nitrogen and removal of ammonianitrogen which was produced from organic nitrogen decomposition were the keysteps of organic nitrogen wastewater treatment. Organic amine wastewater was asan example in this paper. Anaerobic hydrolysis+anaerobic ammoniumoxidation（ANAMMOX） was adopted to degrade organic amine and removeammonia, research start-up of anaerobic reactor, influencing factors ofANAMMOX reactor operation and efficiency of organic amine degradation andammonia nitrogen removal.Run for30days under normal temperature condition, the EGSB cultivateorganic nitrogen decomposition bacteria successfully.The COD removal rate up toabout90%, the decomposition efficiency of organic nitrogen reached55%.After150days of the UASB operating at normal temperature, the ANAMMOXbacteria was fostered successfully. The removal rate of NH4+and NO₂^-up to about50%and55%.The optimum temperature, pH, hydraulic retention time,COD andNO₂^-mass concentration for ANAMMOX reactor operating were30-35℃,7-7.5,24h,100-200mg/L and100mg/L.The degradation of organic amine occurred mainly in the first stage anaerobicreactor, Supplemented with a small amoumt of organic carbon could increase thedegradation of organic amine. The removal of ammonia occurred primarily in thestage of ANAMMOX. The nitrite concentration is an important factor in the processof ANAMMOX, if ANAMMOX reactor lacking nitrite, ammonia would not be ableto removed satisfactorily. The organic amine wastewater after this processtreatment, the removal rate of COD, TN and organic amine reached about90%,40%and55%.