使用聚酰胺 - 胺( P A M A M )树形分子对造纸厂产生的废水进行絮凝处理,结果表明, PA M A M 树形分子对造纸废水具有优异的絮凝效果,在 p H 值 3.0 左右, PAM AM 在 50m g/L 的条件下 S S 和 C OD C r 去除率可分别达到 91% 和 89.4% 。高性价比树枝状分子材料专业制造商—威海晨源化工新材料有限公司整理自《聚酰胺 - 胺树形分子在造纸废水处理中的应用研究》申毅 张光华 朱雪丹(教育部轻化工助剂化学与技术重点实验室,陕西科技大学,西安 710021 ) Email:cymajunqiang@whcyd.com
A diverse bacterial community in a n anoxic quinoline-degrading bioreactor determined by using pyrosequencing and clone library analysis Zhang X , Yue S , Zhong H, Hua W, Chen R, Cao Y, and Zhao L . A diverse bacterial community in a n anoxic quinoline-degrading bioreactor determined by using pyrosequencing and clone library analysis. Applied Microbial and Biotechnology , 2011, 91:425–434. Abstract There is a concern of whether the structure and diversity of a microbial community can be effectively revealed by short-length pyrosequencing reads. In this study, we performed a microbial community analysis on a sample from a high-efficiency denitrifying quinolinedegrading bioreactor and compared the results generated by pyrosequencing with those generated by clone library technology. By both technologies, 16S rRNA gene analysis indicated that the bacteria in the sample were closely related to, for example, Proteobacteria, Actinobacteria, and Bacteroidetes. The sequences belonging to Rhodococcus were the most predominant, and Pseudomonas, Sphingomonas, Acidovorax, and Zoogloea were also abundant. Both methods revealed a similar overall bacterial community structure. However, the 622 pyrosequencing reads of the hypervariable V3 region of the 16S rRNA gene revealed much higher bacterial diversity than the 130 sequences from the full-length 16S rRNA gene clone library. The 92 operational taxonomic unit (OTUs) detected using pyrosequencing belonged to 45 families, whereas the 37 OTUs found in the clone library belonged to 25 families. Most sequences obtained from the clone library had equivalents in the pyrosequencing reads. However, 64 OTUs detected by pyrosequencing were not represented in the clone library. Our results demonstrate that pyrosequencing of the V3 region of the 16S rRNA gene is not only a powerful tool for discovering low-abundance bacterial populations but is also reliable for dissecting the bacterial community structure in a wastewater environment. 原文链接:http://www.springerlink.com/content/c763h26l28541v38/ PDF 原文下载: Zhang2011-AMB.pdf