| 苯胺对间歇及连续运行硝化过程的毒性抑制试验 |
| 摘要点击 1508 全文点击 1529 投稿时间：2006-11-17 修订日期：2007-07-19 |
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| 中文关键词 苯胺废水 硝化 抑制作用 三相流化床 |
| 英文关键词 aniline wastewater nitrification inhibition three-phase fluidized bed |
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| 中文摘要 |
| 以经过驯化的苯胺降解菌和硝化菌作为菌源，在悬浮污泥间歇反应器中及三相流化床反应器中分别考察了间歇及连续进水2种工艺条件下苯胺对硝化过程的毒性抑制作用.结果表明，苯胺对悬浮污泥间歇反应器中的硝化菌有较强的抑制作用，仅当苯胺浓度低于3 mg/L时，硝化菌的活性才能逐渐恢复，且恢复的时间随着苯胺的初始浓度的增高而延长.实验结果还显示，适宜的水力停留时间（HRT）是保证三相流化床中苯胺成功降解及硝化脱氮的关键工艺条件.当进水苯胺浓度为200 mg/L，HRT为10 h时，反应液中苯胺浓度为6.58 mg/L，硝化率可达84.95%，由此表明膜硝化反应器抵抗苯胺毒性抑制的能力强于悬浮污泥硝化反应器，在工业上采用三相流化床膜硝化反应器对含毒性有机物的废水进行硝化脱氮处理是有实际应用价值的. |
| 英文摘要 |
| 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. |
