摘  要多环芳烃因具有典型的“三致”作用（致癌、致畸、致突变）而倍受人们关注。美国环保局认定了16种多环芳烃为优先控制污染物。生物降解是环境中去除多环芳烃最有效的途径之一。通过控制添加外源菌剂的污泥发酵实验，研究多环芳烃的降解变化情况。结果表明，好氧条件下多环芳烃降解变化规律总体呈现先上升后下降的趋势；较30天相比,促腐剂、恶臭假单胞菌（1003菌）以及食苯芽孢杆菌（3665菌）组发酵21天对多环芳烃降解效果更明显；本实验选用的菌剂对低环多环芳烃（PAHs≤3）的降解促进效果更为明显。69310

该论文有图4幅，表3个，参考文献15篇。

毕业论文关键词：城市污泥  好氧发酵  多环芳烃  菌剂  

Study on change of polycyclic aromatic hydrocabons (PAHs) during sludge aerobic fermentation

Abstract

Polycyclic aromatic hydrocarbons(PAHs), which have three typical effects (carcinogenesis, teratoeenesis, mutation), get a lot of attention. The U. S. EPA identified 16 PAHs as the priority control pollutants. Biodegradation is one of the most effective ways to remove PAHs, therefore, research on PAHs degradation change is of great significance. By controlling the added bacteria fermentation agent, the degradation of PAHs is studied. The results showed that the trend of PAHs degradation, under aerobic conditions, is rising and then falling. Compared with that 30 days fermentation, Decay agent, Pseudomonas putida(1003) and Fresh benzene Bacillus(3665) have more promoting effect on PAHs degradation after 21 days fermentation. In this experiment, the degradation effect of agents on the low polycyclic aromatic hydrocarbons (PAHs≤3) is more obvious.

Key Words: urban sludge  aerobic fermentation  polycyclic aromatic hydrocarbons  bacteria  

目  录

摘要Ⅰ

AbstractⅡ

目录Ⅲ

图清单Ⅳ

表清单Ⅳ

1 绪论 1

2 材料与方法 2

2.1 试剂与材料 2

2.2 仪器与设备 2

2.3 实验方法 2

3 结果与讨论 5

3.1 污泥中多环芳烃含量及种类的分布 5

3.2 好氧发酵过程中多环芳烃总量变化规律 7

3.3 好氧发酵过程中添加不同菌剂的降解情况 8

4 结论 12

参考文献 13

致谢 14

图清单

图序号 图名称 页码

图31 添加不同菌剂泥样发酵过程中主要多环芳烃物质组成分布

pH值对黄铜矿上浮率的影响关系曲线 6

图32 多环芳烃总含量变化情况 7

图33 不同菌剂泥样发酵前后多环芳烃含量对比 8

图34 添加不同菌剂后多环芳烃降解情况

9

表清单

表序号 表名称 页码

表31 不同发酵过程中多环芳烃的总量