[Inhibition investigation of aniline on nitrification process in batch and continuous running reactors].
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.
Wu
Jin-Hua
JH
School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China. jinhuawu@scut.edu.cn
Wei
Chao-Hai
CH
Li
Ping
P
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*
D000814:Aniline Compounds; D009573:Nitrites; D012722:Sewage; C023650:aniline