污染控制技术及原理
骆海萍,刘广立,张仁铎,SongJin.高浓度苯酚的MFC降解及产电性能[J].环境科学学报,2008,28(11):2181-2185
高浓度苯酚的MFC降解及产电性能
- Electricity generation by degradation of high concentration 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);广东省自然科学基金(No.05003338)
- 作者
- 单位
- 骆海萍
- 中山大学环境科学与S-程学院, 广州 510275
- 刘广立
- 中山大学环境科学与S-程学院, 广州 510275
- 张仁铎
- 中山大学环境科学与S-程学院, 广州 510275
- SongJin
- WesternResearchInstitute, Laramie, WY 82072, USA
- 摘要：以铁氰化钾溶液作为电子受体,在阴阳两极室中分别填充石墨颗粒的基础上构建了填料型微生物燃料电池(Microbial Fuel Cell,MFC),研究了苯酚为单一燃料和苯酚+葡萄糖为混合燃料条件下MFC的产电特性以及对苯酚和COD的去除效果.在1000Ω外电阻条件下,1000mg·mL-1苯酚为单一燃料运行时,MFC在苯酚去除率达到约90%时输出电压达到最大值,最大输出电压为540mV,产电曲线存在单一极大值;以1000mg·mL-1苯酚+500mg·mL-1葡萄糖为混合燃料运行时,最大输出电压可达657mV,产电曲线存在2个峰值,第1峰值和第2峰值出现时对应的苯酚去除率分别约为20%和90%.混合燃料运行条件下,前后2个产电峰值出现时MFC的最大体积(面积)功率密度分别为28.3W·m-3(342.0mW·m-2)和12.6W·m-3(152.2mW·m-2),内阻分别为194Ω和246Ω.在2种燃料情形下,MFC对苯酚和COD的去除率均可在60h之内分别达到95%和90%以上.试验结果表明,MFC能够利用高浓度苯酚作为燃料,在实现高效降解的同时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 packing-type Microbial Fuel Cell(MFC) using ferricyanide as electron acceptor was constructed and packed with granular graphite in both anode and cathode chambers.The MFC reactor was designed to test the effect of phenol degradation and simultaneous electricity generation,using phenol or a glucose-phenol mixture as the fuel.For phenol as the sole fuel,only one peak voltage appeared during each electric cycle and the maximal voltage output was obtained when the removal efficiency of phenol was up to 90%.Aunique pattern of twin voltage peaks was observed when the phenol-glucose mixture was used as the fuel.At the occurrence of the first and second voltage peaks,phenol was depleted by 20 and 90%,respectively.The maximal voltage outputs obtained were 540 and 657 mV (based on external resistance of 1000Ω) for phenol and the glucose-phenol mixture,respectively.For the phenol-glucose mixture,the maximal power densities were 28.3(342.0)and 12.6 W·m-3(152.2mW·m-2)at the first and second voltage peaks,respectively.For the first and second voltage output maxima,the corresponding inner-resistances of the MFC were 194 and 246Ω,respectively.During this study,the degradation efficiencies of phenol in all the MFCs exceeded 90% within 60 hours.The results indicated that high concentration phenol could be used in the MFC for generating power and at the same time accomplishing biodegradation effectively.The MFC may offer a new technique to promote biodegradation of recalcitrant contaminants such as phenol in practical applications.
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