Biotransformation of 4-Hydroxybenzoic Acid under Nitrate-Reducing Conditions in a MEC Bioanode
文献类型：期刊论文
| 作者 | Zhai, Siyuan; Ji, Min; Zhao, Yingxin; Pavlostathis, Spyros G. |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-02-02 |
| 卷号 | 55期号:3页码:2067-2075 |
| ISSN号 | 0013-936X |
| 英文摘要 | 4-Hydroxybenzoic acid (HBA) is commonly found at high concentrations in waste streams generated by the thermochemical conversion of lignocellulosic biomass to bio-oils and biofuels. The objective of this study was to systematically assess the biotransformation of HBA in the bioanode of a microbial electrolysis cell (MEC) for the production of renewable cathodic H-2. A mixed, denitrifying culture, enriched with HBA as the sole electron donor, was used as the anode inoculum. MEC electrochemical performance, H-2 yield, HBA biotransformation pathways and products, and the bioanode suspended and biofilm microbial communities were examined. In the absence of nitrate, 60%-100% HBA was converted to phenol, which persisted, resulting in very limited exoelectrogenesis. Under nitrate-reducing conditions, complete HBA degradation was achieved in the MEC bioanode with very low phenol production, resulting in the production of cathodic H-2. The predominant bacterial genus in the MEC bioanode (relative abundance 33.4%-41.9%) was the denitrifier Magnetospirillum, which uses the benzoyl-CoA pathway to degrade aromatic compounds. Geobacter accounted for 5.9-7.8% of the MEC bioanode community. Thus, active nitrate reduction in the MEC bioanode led to complete HBA degradation, resulting in a higher extent of exoelectrogenesis and cathodic H-2 production. The results of this study provide mechanistic insights into a productive use of HBA and other phenolic compounds typically found in waste streams resulting from the thermochemical conversion of lignocellulosic biomass to biofuels. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46100]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300350, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Tianjin Engn Ctr Urban River Ecopurificat Technol, Tianjin 300350, Peoples R China 4.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA |
| 推荐引用方式 GB/T 7714 | Zhai, Siyuan,Ji, Min,Zhao, Yingxin,et al. Biotransformation of 4-Hydroxybenzoic Acid under Nitrate-Reducing Conditions in a MEC Bioanode[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(3):2067-2075. |
| APA | Zhai, Siyuan,Ji, Min,Zhao, Yingxin,&Pavlostathis, Spyros G..(2021).Biotransformation of 4-Hydroxybenzoic Acid under Nitrate-Reducing Conditions in a MEC Bioanode.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(3),2067-2075. |
| MLA | Zhai, Siyuan,et al."Biotransformation of 4-Hydroxybenzoic Acid under Nitrate-Reducing Conditions in a MEC Bioanode".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.3(2021):2067-2075. |
入库方式： OAI收割
来源：生态环境研究中心
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