| 上流式厌氧污泥床反应器处理3-硝基酚废水研究 |
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| 中文关键词 UASB 3-硝基酚 颗粒污泥 驯化 厌氧降解 |
| 英文关键词 UASB 3-nitrophenol granular sludge acclimation anaerobic degradation |
| DOI 10.13227/j.hjkx.20061112 |
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| 中文摘要 |
| 利用实验室规模的UASB反应器，研究了颗粒污泥驯化前后的特性，3-硝基酚(3-NP)的降解效果和UASB处理3-NP废水的工艺参数。试验结果表明，驯化过程中颗粒污泥很快适应了3-NP废水；扫描电镜观察显示，颗粒污泥表面丝状菌占优势。在3-NP废水厌氧降解性实验中，保持HRT和进水COD浓度不变，分别为26 h和2500 mg/L左右。当3-NP浓度由20 mg/L逐渐提高到250 mg/L时，COD去除率由95.2%下降到85.1%；3-NP的去除率保持在99%以上；3-AP是3-NP降解过程中的主要中间产物，3-NP转化为3-AP的转化率由58.7%上升到111.9%；产气量变化较小，甲烷占总产气量百分数最小为65%，最大为74%。 |
| 英文摘要 |
| Characteristics of anaerobic granules before and after acclimation, removal efficiencies of 3-nitrophenol (3-NP) and performance of 3-NP wastewater treatment were investigated in a lab-scale upflow anaerobic sludge bed (UASB). The results showed that granular sludge acclimatized to 3-NP rapidly during acclimation. Using SEM, the Filamentous bacteria was the predominant bacteria on the surface of granules. Throughout the study of 3-NP wastewater anaerobic degradation, hydraulic retention time (HRT) and input COD concentration were kept constant as 26 h and 2500 mg/L, respectively. While 3-NP concentrations increasing from 20 mg/L to 250 mg/L gradually, COD removal decreased from 95.2% to 85.1% and 3-NP removal efficiencies were always more than 99%. 3-AP was found to be the major intermediate during the degradation of 3-NP. Out of the total input of 3-NP concentration, on molar basis , about 58.7%～111.9% of 3-NP was recovered in the form of 3-AP. With increasing 3-NP concentration, the variations of gas production were minimal. The minimum methane percentage was 65% and the maximum was 74%. |
