title: [Inhibition investigation of aniline on nitrification process in batch and continuous running reactors].
abstract: Inhibition effect of aniline on nitrifier was investigated in suspended sludge batch reactors and a three-phase fluidized bed. The tested nitrifier and aniline degradation bacteria were obtained from excess sludge of a treatment plant for aniline wastewater. The results showed that aniline had produced obvious inhibition on nitrifier in suspended sludge batch reactors. Barely when aniline concentration was less than 3 mg/L, had nitrifier gradually recovered their ability. But the recovered time prolonged with the augment of initial aniline concentration. Feasible hydraulic retention time (HRT) was a key operating factor to remove aniline and ammonia simultaneously in fluidized bed reactor. When aniline concentration in influent was 200 mg/L and HRT was 10 h, aniline concentration was 6.58 mg/L and nitrifying rate achieved 84.95% in the fluidized bed reactor. Three-phase fluidized biofilm nitrifying reactor was superior to suspended sludge nitrifying reactor in resisting aniline toxicity and has practical value in denitrifying treatment of wastewater containing toxic organic chemicals.
authors.affiliation: School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China. jinhuawu@scut.edu.cn
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Wu
authors.forename: Chao-Hai
authors.initials: CH
authors.lastname: Wei
authors.forename: Ping
authors.initials: P
authors.lastname: Li
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry* / Q000378:metabolism; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D009573:Nitrites / Q000378:metabolism; D009606:Nitrosomonas / Q000378:metabolism* / Q000502:physiology; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000814:Aniline Compounds; D009573:Nitrites; D012722:Sewage; C023650:aniline