Study On The Start-up Of Anaerobic Ammonia Oxidation And Controlling Factors

Compared with traditional techniques for nitrogen removal by microbial, the anaerobic ammonium oxidation technique is a kind of new style and widely promising method for ammonium removal which is free from the use of neutralization reagents, secondary pollution and save the consumption of energy. Plenty of experiments, theoretical analysis and application research on this object have been performed, and bought a lot of results by many investigators. On the base of summarizing the results, by adopting theoretical education and experimental analysis, the research has done a lot of work.A Sequencing Batch Reactor was used in this investigation. The culture of anaerobic oxidation biomass seeded with anaerobic digest and aerobic nitrification sludge was carried out in the two sets of SBR reactor. Firstly, the start-up of reactor was studied. The reactors were successfully started up by anaerobic digest and aerobic nitrification sludge. Ammonium and nitrite could be removed successfully in the reactors. Anammox process seeded by digest sludge set up more rapidly than that for the aerobic nitrification sludge. But NH4~+-N removal efficiencies for aerobic nitrification sludge are better than those for the anaerobic digest sludge.The experiments results for the effects of concentration of substrate such as ammonium and nitrite show that the Anammox reaction rate increased with increase of NH4~+-N concentration. The Anammox process was not inhibited when the influent of ammonium was 560mg/L.Under the condition of normal carbon, the optional condition of reactive control for Anammox bioreactor were as follows: pH value about 7.55, temperature from 31℃.