污染控制技术及原理
骆海萍,刘广立,张仁铎,SonaJin.以苯酚为燃料的微生物燃料电池产电特性[J].环境科学学报,2008,28(7):1279-1283
以苯酚为燃料的微生物燃料电池产电特性
- Production of electricity from phenol using a microbial fuel cell
- 基金项目：广东省环境污染控制与修复技术重点实验室开放基金(No.2006K0007);广东省自然科学基金(No.05300697;No.05003338)
- 作者
- 单位
- 骆海萍
- 中山大学环境科学与工程学院, 广州 510275
- 刘广立
- 中山大学环境科学与工程学院, 广州 510275
- 张仁铎
- 中山大学环境科学与工程学院, 广州 510275
- SonaJin
- WesternResearchInstitute, Laramie, WY 82072, USA
- 摘要：选取城市污水处理厂的好氧和厌氧混合污泥作为接种液,构建了双极室微生物燃料电池(Microbial fuelcell,MFC),对以葡萄糖、葡萄糖和苯酚、苯酚为不同燃料的MFC进行了有机物降解和产能效果的研究.试验结果表明,以葡萄糖为单一燃料时MFC的启动时间最短,以苯酚为单一燃料时MFC启动时间最长.MFC在不同燃料来源条件下对苯酚去除率均大于85%,COD去除率超过80%.MFC的连续运行试验结果表明,在1000Ω外电阻条件下,以葡萄糖为单一燃料的MFC运行周期最长,可达400h,最大输出电压为551mV,功率密度为121mW·m-2(阳极);以葡萄糖和苯酚为混合燃料的MFC运行周期约200h,最大输出电压为208mV,功率密度为16mW·m-2(阳极);而以苯酚为单一燃料的MFC运行周期仅约为100h,最大输出电压为121mV,功率密度为6mW·m-2(阳极).试验结果最终表明,MFC能够利用苯酚作为燃料,在实现高效降解的同时可稳定地向外输出电能,这为酚类难降解有机物的高效低耗处理提供了新的研究思路.
- Abstract：A two-chambered microbial fuel cell (MFC) was constructed and inoculated with mixed aerobic and anaerobic activated sludge collected from a sewage treatment plant. The MFC reactor was designed to test the potential for pollutant degradation and simultaneous generation of electricity, using various substrates, such as glucose, a glucose-phenol mixture, and phenol. The MFC using glucose as fuel had the shortest start-up time, while the start-up time of the MFC using phenol was the longest. Removal efficiencies of phenol and COD (chemical oxygen demand) were up to 85% and 80%, respectively, in all tests of the MFC. In addition, removal of phenol in the MFC reactor was compared using an anode electrically connected or disconnected to the cathode, with the same operation time. During the experiments, the electric cycle was operated for 400, 200, and 100 h for the glucose, mixed glucose-phenol, and phenol substrates, respectively. The maximal voltage outputs obtained were 551, 208, and 121 mV (based on external resistance of 1000Ω)for glucose, glucose-phenol mixture, and phenol, respectively. For glucose, glucose-phenol mixture, and phenol, the maximal power outputs were 121, 16, and 6 mW·m-2(anode), respectively. The results indicated that phenol could be used in the MFC for generating power while at the same time effectively accomplishing biodegradation. The MFC technology may provide a new method to offset operating costs, making advanced remediation measures for difficult to degrade organic materials more affordable for practical applications.
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