Biodegradation of organonitriles by adapted activated sludge consortium with acetonitrile-degrading microorganisms
文献类型：期刊论文
| 作者 | Bai, Renbi; Wong, Fook-Sin; Ohandja, Dieudonne-Guy; Liu, Junxin; Li, Tinggang |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2007-08 |
| 卷号 | 41期号:15页码:3465-3473 |
| 关键词 | Biodegradation Organonitriles Activated Sludge Consortium Adaptation Degradation Pathway |
| 英文摘要 | A microbial process for the degradation of three types of structurally distinct organonitriles (i.e., saturated and unsaturated aliphatic nitrile and aromatic nitrile) was studied. Microorganisms were enriched from the activated sludge of a pharmaceutical wastewater treatment plant and adapted through providing acetonitrile as the sole carbon and nitrogen source for their growth. The adapted mixed culture was then examined for their capability of degrading acetonitrile, acrylonitrile and benzonitrile under various operational conditions. The performance of biodegradation and the metabolic intermediate- and end-products in the process were monitored. The results show that an average removal rate of 0.083g acetonitrile g(-1)-VSSh(-1), 0.0074g acrylonitrileg(-1)-VSSh(-1) or 0.0029g benzonitrileg(-1)-VSSh(-1) was achieved in the batch bioreactor under the common operational condition of 25 degrees C and pH 7. The biodegradation of acetonitrile and acrylonitrile showed a two-step pathway, with the generation of acetamide followed by acetic acid and ammonia for acetonitrile or acrylamide followed by acrylic acid and ammonia for acrylonitrile. However, the biodegradation of benzonitrile appeared to have only one step, with the direct production of benzoic acid and ammonia, but without benzamide being detected in the process. The results suggest that, depending on the substrates, the adapted mixed culture can develop very different degradation pathways, such as nitrile hydratase plus amidase for acetonitrile or acrylonitrile and nitrilase for benzonitrile. Therefore, the adapted mixed culture has a great potential and flexibility for actual applications in biodegradation of various organonitrile compounds. (C) 2007 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000248634600028 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22612]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 推荐引用方式 GB/T 7714 | Bai, Renbi,Wong, Fook-Sin,Ohandja, Dieudonne-Guy,et al. Biodegradation of organonitriles by adapted activated sludge consortium with acetonitrile-degrading microorganisms[J]. WATER RESEARCH,2007,41(15):3465-3473. |
| APA | Bai, Renbi,Wong, Fook-Sin,Ohandja, Dieudonne-Guy,Liu, Junxin,&Li, Tinggang.(2007).Biodegradation of organonitriles by adapted activated sludge consortium with acetonitrile-degrading microorganisms.WATER RESEARCH,41(15),3465-3473. |
| MLA | Bai, Renbi,et al."Biodegradation of organonitriles by adapted activated sludge consortium with acetonitrile-degrading microorganisms".WATER RESEARCH 41.15(2007):3465-3473. |
入库方式： OAI收割
来源：生态环境研究中心
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