title: Bio-augmentation for mitigating the impact of transient oxytetracycline shock on anaerobic ammonium oxidation (ANAMMOX) performance.
abstract: The feasibility of applying bio-augmentation tactics to remit the influence of transient oxytetracycline (OTC) shock on the anaerobic ammonium oxidation (ANAMMOX) process was evaluated. The bio-augmentation was applied together with shock test, with OTC shock concentration of 518 mg L(-1) and 1-h duration. 0.655-2.62 g volatile suspended solid (VSS) sludges were varied to optimize bio-augmentation dosage (BAD), and appropriate bio-augmentation time (BAT) was determined. The validity of the bio-augmentation was indicated by recovery performance and sludge characteristics. The restoring time of 38 h for bio-augmented reactor was shorter than that of non-bio-augmented reactor (45 h), and heme c content was increased respectively from 0.195 ± 0.001, 0.267 ± 0.047, 0.301 ± 0.049, to 0.340 ± 0.053 μmol g(-1) VSS with the BAD of 0.655, 1.31, 1.97, 2.62 g-VSS. The results suggest that bio-augmentation enhances the recovery of ANAMMOX performance following OTC shock and BAT and BAD are key operational factors.
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China. Electronic address: jrczju@yahoo.com.cn.
authors.forename: Ren-Cun
authors.initials: RC
authors.lastname: Jin
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Zhang
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Zheng-Zhe
authors.initials: ZZ
authors.lastname: Zhang
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Jia-Hong
authors.initials: JH
authors.lastname: Liu
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Bi-E
authors.initials: BE
authors.lastname: Yang
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Li-Xin
authors.initials: LX
authors.lastname: Guo
authors.affiliation: College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Hui-Zhong
authors.initials: HZ
authors.lastname: Wang
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism*; D000693:Anaerobiosis; D019149:Bioreactors; D006418:Heme / Q000031:analogs & derivatives / Q000378:metabolism; D009584:Nitrogen / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010118:Oxytetracycline / Q000378:metabolism*; D011108:Polymers / Q000378:metabolism; D012722:Sewage
chemical_list: D064751:Ammonium Compounds; D011108:Polymers; D012722:Sewage; C031690:heme C; D006418:Heme; D009584:Nitrogen; D010118:Oxytetracycline
keywords: ANAMMOX; Bio-augmentation; OTC; Sludge characteristics; Transient shock