title: Impact of reactor configuration on anammox process start-up: MBR versus SBR.
abstract: Anaerobic ammonium oxidation (anammox) is an energy saving biological nitrogen removal process which was limited to slow growth rate of anammox bacteria during start-up period. This study investigated the start-up of anammox process by a laboratory sequential batch reactor (SBR) for 218 days and subsequently modified the reactor as a membrane bioreactor (MBR) for 178 days. Modification of a SBR as MBR with installation of an external membrane module resulted in acceleration of specific anammox activity by 19 times. The acceleration of specific anammox activity with MBR was further confirmed by starting-up another MBR for a 242 day period. Molecular microbial analyses showed that Candidatus "Brocadia anammoxidans" and Candidatus "Kuenenia stuttgartiensis" were the dominant species in the inocula and biomass developed in the reactor. The start-up with MBR appeared to be more effective than SBR for the enrichment of anammox bacteria due to high sludge retention property of MBR configuration.
authors: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors: Yu
authors: Y
authors: Tao
authors: Da-Wen
authors: DW
authors: Gao
authors: Yuan
authors: Y
authors: Fu
authors: Wei-Min
authors: WM
authors: Wu
authors: Nan-Qi
authors: NQ
authors: Ren
mesh_terms: D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D019149:Bioreactors / Q000382:microbiology*; D049109:Cell Proliferation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism*; D020560:Proteobacteria / Q000378:metabolism*; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*
chemical_list: D008567:Membranes, Artificial; D000644:Quaternary Ammonium Compounds; D010100:Oxygen