Extra nitrification technology0 pages

Extra NitrificationNitrification is a problem for many chemical and pharmaceutical industries who utilize primary products with nitrogen. Due to the presence of inhibiting compounds or due to a too short sludge
it can happen that the nitrification process is incomplete ending with NO2 production, the latter being toxic and with very low discharge limits.Austephas developed a process for the complete and reliable nitrification, that can easily be integrated in existing Waste Water Treatment Plants.NH4+nutrientsinfluentwastewatereffluentsludgerecycleExcessSludgedischargeBIOLOGICAL OXIDATION AND NITRIFICATIONCLARIFYERNITRIFYING BACTERIA PRODUCTIONPROCESS DESCRIPTIONIn biological aerobic Waste Water Treatment Plants (WWTP) organic nitrogen is ammonifiedand ammonium is then transformed into NO2 by Nitrosomonasbacteria and further into NO3 by Nitrobacters.With EXTRA NITRIFICATION nitrifying bacteria are selected and bred in a separate reactor under controlled conditions. They are fed with a nitrogen enriched high selective substrate in order to have high growth rates.The nitrifying bacteria are then dosed into the oxidation basin.The amount depends on the wastewater characteristics, on the sludge age and MLSST. Austepperforms pilot tests in order to determine it.