摘 要 为提高氟化工废水的可生化性,寻找适应性强、降解效果好的功能微生物,应用PCR-DGGE技术对氟化工废水处理系统活性污泥中微生物群落结构特征进行分析。本研究采用某氟化工企业污水处理厂一期工程活性污泥S1,二期工程活性污泥S2,以及城市污水处理厂的污泥S3,研究三类污泥在氟化工废水处理中的微生物群落结构特征。研究表明,3种活性污泥微生物多样性均较为明显,其中污泥S1的Shannon-Wiener指数达到1。61。通过克隆测序,鉴定三种泥样中微生物的16S rDNA序列,鉴定出的Kytococcus sedentarius 等13种微生物的序列,筛选出Cupriavidus metallidurans CH34 等6种能够适应和降解氟化工废水的优势菌种。上述研究结果为我们理解氟化工混合废水处理系统中的微生物群落结构和优势菌种提供了新的见解。90036
Due to improve the biodegradability of fluorine chemical wastewater and find the functional microorganisms with strong adaptability and good degradation efficiency, this study analyzed microbial community structure characteristics in the activated sludge of fluorine chemical wastewater treatment system by using PCR-DGGE technology。 Three types of activated sludge named S1, S2, S3 from different wastewater treatment plants(S1, S2 belong to sludge of treatment of industrial wastewater; S3 belong to sludge of treatment of domestic wastewater) were used for study the microbial community structure of sludge in fluoride chemical wastewater treatment plant。 The microbial persity of 3 kinds of activated sludge were analyzed by DGGE dominant bands。 The results showed that the microbial persity of the 3 kinds of activated sludge was obvious, and the Shannon Wiener persity index of S1 was up to 1。61。 By cloning and sequencing analyses of selected dominant bacteria,13 kinds of 16S rDNA sequences were successfully identified from 3 kinds of sludge samples, from which 6 kinds of dominant functional microorganisms were identified.
毕业论文关键词:氟化工废水; 活性污泥; 微生物群落;PCR-DGGE源Q于W优E尔A论S文R网wwW.yOueRw.com 原文+QQ75201,8766
Keyword: Fluorine chemical wastewater; Activated sludge; Microorganism community;PCR-DGGE
目 录
1引言(Introduction) 4
2材料与方法(Material and Method) 5
2。1废水及材料来源 5
2。2分析方法 5
2。2。1 PCR-DGGE 5
2。2。2克隆测序 6
3结果与讨论(Results and Discussion) 7
3。1不同活性污泥中微生物的DGGE图谱 7
3。2不同活性污泥中来自优Y尔L论W文Q网wWw.YouERw.com 加QQ7520~18766 微生物聚类分析 8
3。 3不同活性污泥中微生物香浓指数多样性分析 9
3。 4不同活性污泥中优势菌种的鉴定 10
4结论(Conclusion) 12
5展望(Prospect) 12
参考文献 13
致谢 15
1引言(Introduction)
2011年,我国氟化工行业产值增长达302亿元,同比增长41。1%,2012年同比增长76。5%,数十年来,全球氟化工产业迅猛发展,氟聚合物产品被广泛应用于制冷、航空航天、石油化工、机械、电子、冶金等领域[1]。我国作为世界四大氟产品生产和消费区之一,水环境中有机氟化物的污染也日益严重。与此同时,氟化工废水具有有机物浓度高、毒性强、可生化性差、成分复杂、色度高、有异味、强酸强碱性等特点而难以处理[2],对人类的健康和生存的影响日趋严重。因此,氟化工废水的处理成为一个极具理论价值和应用前景的研究方向[3-4]。论文网