title: The robustness of ANAMMOX process under the transient oxytetracycline (OTC) shock.
abstract: The effect of transient oxytetracycline (OTC) shock on the stability of anaerobic ammonium oxidation (ANAMMOX) process was evaluated in the present study. The shock test was implemented with 155-1731mgL(-1) OTC, lasting for 1 to 3-fold hydraulic retention times, under the nitrogen loading rate (NLR) of 6.72 and 13.4kgm(-3)d(-1). The response of the process was divided into shock and recovery stage and the performance under the stress was indicated by stability index and granule characteristic. In the shock period, nitrogen removal rate (NRR) was ranged from 12.1 to 12.1-4.04kgm(-3)d(-1). The specific ANAMMOX activity (SAA) and heme c content, were respectively reduced by 1.4% and 17.6-29.4%. Foremost, the OTC shock was restorable and the recovery lasted for 4-353h. The robustness of ANAMMOX process was dependent on OTC level, duration of shock and NLR applied.
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
authors: Qian-Qian
authors: QQ
authors: Zhang
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
authors: Hui
authors: H
authors: Chen
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
authors: Jia-Hong
authors: JH
authors: Liu
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
authors: Bi-E
authors: BE
authors: Yang
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
authors: Wei-Min
authors: WM
authors: Ni
authors: Department of Environmental Science and Engineering, Hangzhou Normal University, Hangzhou 310036, PR China. Electronic address: jrczju@yahoo.com.cn.
authors: Ren-Cun
authors: RC
authors: Jin
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D000693:Anaerobiosis / Q000187:drug effects; D001704:Biopolymers / Q000032:analysis; D006418:Heme / Q000031:analogs & derivatives / Q000032:analysis; D009584:Nitrogen / Q000302:isolation & purification; D010084:Oxidation-Reduction / Q000187:drug effects; D010118:Oxytetracycline / Q000494:pharmacology*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid
chemical_list: D001704:Biopolymers; D012722:Sewage; C031690:heme C; D006418:Heme; D000641:Ammonia; D009584:Nitrogen; D010118:Oxytetracycline
keywords: ANAMMOX; OTC; Sludge characteristics; Stability; Transient shock