title: Start up of deammonification process in one single SBR system.
abstract: A process for autotrophic nitrogen removal named aerobic/anoxic deammonification wherein NH4+ is oxidized by nearly 50% to NO2- and subsequently the ammonia is converted together with the nitrite to molecular nitrogen (N2 gas), has come to full-scale application within the last few years. In this research, sludge from a biological rotation disk located at a landfill leachate plant at Mechernich, Germany, which is capable of performing the deammonification process, was used as seed sludge for acclimating deammonification activities in laboratory scale batch-reactors. In parallel, the same tests were performed with normal activated sludge. Research results indicated that deammonification activities could be obtained from the seeded reactor and also, with limited performance, from normal activated sludge in a single SBR system after several months acclimation. It was also seen that oxygen is an important factor that influences the deammonification from both the acclimatization process and process running. Further results were approved that report an impact of nitrite as a process intermediate on the closely related process of anaerobic ammonia oxidation ("Anammox"). However, limiting concentrations on a bacteria population performing deammonification were found to be different to those reported for a pure Anammox-culture. Also the influence of another intermediate, hydrazine, was tested for speeding up the acclimating process by inducing the deammonification activities and recovering the activities of deammonification from nitrite inhibition.
authors.affiliation: Department of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China. xmli@hnu.cn
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: G
authors.initials: G
authors.lastname: Zen
authors.forename: K H
authors.initials: KH
authors.lastname: Rosenwinkel
authors.forename: S
authors.initials: S
authors.lastname: Kunst
authors.forename: D
authors.initials: D
authors.lastname: Weichgrebe
authors.forename: A
authors.initials: A
authors.lastname: Cornelius
authors.forename: Q
authors.initials: Q
authors.lastname: Yang
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D018533:Biomass; D019149:Bioreactors; D005858:Germany; D006834:Hydrazines / Q000037:antagonists & inhibitors / Q000378:metabolism; D009573:Nitrites / Q000037:antagonists & inhibitors / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods*
chemical_list: D006834:Hydrazines; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D012722:Sewage; C029424:hydrazine; D009584:Nitrogen; D010100:Oxygen