氮杂环化合物吡啶在不同条件下的降解及共代谢研究

通过摇瓶试验研究了氮杂环化合物吡啶在曝气吹脱、好氧、缺氧和厌氧条件下的降解规律以及吡啶与喹啉、2-甲基吡啶、苯胺、茚和萘共代谢条件下在A2/O工艺中的去除规律。研究结果表明:经过24h曝气,吡啶去除率达到了26.9%,曝气吹脱对吡啶的去除作用明显;150mg/L吡啶在缺氧、好氧和厌氧条件下分别需经过3h、6h和24h达到较低浓度水平,在不同条件下的去除速率分别为缺氧>好氧>厌氧。共代谢条件下在A2/O工艺中吡啶的去除受到其他共代谢物质的抑制,在HRT=30h的A2/O工艺中,吡啶去除率仅为41%。

Degradation and Co-metabolism of Nitrogenous Heterocyclic Compound-pyridine under Different Conditions

The degradation and removal of nitrogenous heterocyclic compound-pyridine under aeration stripping, aerobic, anoxia, anaerobic conditions and co-metabolism with quinoline, 2-methylpyridine, aniline, indene, naphthalene in A2/O process were conducted by flask-shaking tests. The results indicate that the removal rate of pyridine reach 26.9 % after air stripping for 24 h, air stripping show significant affect to the removal rate of pyridine, pyridine (150 mg/L) reach low concentration after 3 h,6 h,24 h under anoxia, aerobic,anaerobic conditions, respectively, the removal rate of pyridine under different conditions is anoxia>aerobic>anaerobic. The removal rate of pyridine was inhibited by other cometabolism compounds in A2/O process,when hydraulic retention time(HRT) were 30 h, the A2/O process had removal of pyridine only 41 %.