| 电催化-生物电化学耦合系统处理青霉素废水的机制 |
| 摘要点击 2303 全文点击 731 投稿时间：2020-07-30 修订日期：2020-11-15 |
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| 中文关键词 电催化 生物电化学系统(BES) 硼掺杂金刚石(BDD) 微生物燃料电池(MFC) 青霉素 |
| 英文关键词 electrocatalysis bioelectrochemical system(BES) boron-doped diamond(BDD) microbial fuel cell(MFC) penicillin |
| 作者 | 单位 | E-mail | | 曲有鹏 | 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090
哈尔滨工业大学生命科学与技术学院, 哈尔滨 150080 | qyp1000@163.com | | 吕江维 | 哈尔滨商业大学药学院, 哈尔滨 150076 | | | 董跃 | 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090 | | | 冯玉杰 | 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090 | yujief@hit.edu.cn | | 张杰 | 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090 | |
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| 中文摘要 |
| 抗生素生产过程中产生大量含有残存抗生素的生产废水，传统的污水生物处理技术难以有效地处理此类高浓度抗生素废水.针对此问题，采用电催化-生物电化学耦合系统来处理含有典型的β-内酰胺类抗生素青霉素的废水，利用硼掺杂金刚石（boron-doped diamond，BDD）电催化电极对青霉素废水进行预处理，其出水进入生物电化学系统（bioelectrochemical system，BES）进行后处理.研究发现，经电催化系统预处理后青霉素的去除率为89%，出水进入BES后可以稳定运行，该出水中又有79%的青霉素被BES去除，获得最大功率密度为（1124±28）mW·m-2，与直接进青霉素原始废水的BES反应器相比提高了473%.经过电催化-生物电化学两级耦合系统处理后青霉素的总去除率达到98%.对BES反应器阳极生物量和生物相分析结果表明，青霉素对阳极混合菌群生物量和变形菌门微生物（主要产电菌）有一定的抑制作用，且会降低形成阳极生物膜的主要微生物不动杆菌属Acinetobacter和具有产电功能芽孢杆菌属Bacillus在反应器中含量，这是影响反应器产电性能和处理效果的主要原因.青霉素废水经电催化降解后，浓度明显降低，有效缓解了青霉素对BES的抑制作用，提高废水的可生化性，因此电催化-生物电化学耦合系统是一种高效低能耗处理抗生素废水的新工艺. |
| 英文摘要 |
| Large amounts of wastewater containing residual antibiotics are produced in antibiotics production, but it is difficult for traditional biological wastewater treatment to efficiently treat this high concentration antibiotic wastewater. Coupled electrocatalytic and bioelectrochemical systems were proposed to treat typical β-lactam antibiotics (penicillin) wastewater. The penicillin wastewater was oxidized by a boron-doped diamond (BDD) electrocatalytic electrode and then steadily treated by a bioelectrochemical system (BES). The penicillin removal rate of the electrocatalytic system was 89%, and 79% of the residual penicillin was further removed by the BES. The maximum power density of the BES with pretreated penicillin of (1124±28) mW·m-2 was increased by 473% compared with that of the BES with raw penicillin. The total penicillin removal rate was 98% in the electrocatalytic and bioelectrochemical system. The results of the BES anode biomass and biofacies showed that Acinetobacter was the dominant bacterial group on the anode before penicillin addition, and it was the main microorganism in the formation of the anode biofilm. Bacillus is an electricity-producing bacterium with a power generation function. Penicillin inhibited the biomass of the mixed anode bacteria and the biological activity of Proteus microorganisms, which were the main electricity-producing bacteria, and reduced the biomass of Acinetobacter and Bacillus. This was the main factor affecting the power generation performance and reactor treatment effect. The pretreatment of penicillin wastewater by electrocatalytic degradation can significantly decrease its concentration, efficiently alleviate the inhibition of the BES by penicillin, and improve the biodegradability of wastewater. The coupled electrocatalytic and bioelectrochemical system is a new technology for antibiotic wastewater treatment with a high efficiency and low energy consumption. |
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