电极面积和阴极液组成对微生物燃料电池性能的影响

发布时间：2018-03-17 18:48

本文选题：微生物燃料电池　切入点：生物阴极　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：老龄垃圾渗滤液由于其成分复杂、可生化性差,一直是污水处理中的难点。近年来兴起的生物阴极型微生物燃料电池由于其建造成本相对便宜,并且阳极室、阴极室均具有去除底物污染物的能力,成为处理老龄垃圾渗滤液的一种有效新技术。本文通过构建生物阴极型双室微生物燃料电池,处理老龄垃圾渗滤液,研究了阳极与阴极面积比值和处理过的老龄垃圾渗滤液作为阴极液时对生物阴极型MFC的产电特征、阳极底物与阴极液处理效果的影响。电极面积是影响MFC性能的重要因素。实验结果表明,阳极与阴极面积比为1:2、2:2、2:1的三组生物阴极型微生物燃料电池输出电压分别为408、452、396m V,最大电功率密度分别为145.73、237.65、136.50m W/m3,内阻分别为350、200、400Ω,COD的去除率分别为21.18%、20.20%、22.31%。三组微生物燃料电池运行30d后,垃圾渗滤液中氨氮、硝酸盐氮、亚硝酸盐氮浓度均下降,其中氨氮去除率分别为80.88%、73.61%和66.17%,其去除效果与产电性能相关。阴极液是影响MFC性能的重要因素。实验结果表明,以处理过的老龄垃圾渗滤液作为阴极液的MFC,其COD、氨氮和硝酸盐氮的去除率较传统工艺分别提高了33.74%、44.32%和了17.92%;以体积比为75%的处理过的老龄垃圾渗滤液作为阴极液时,能够显著提高MFC的产电效果及系统的总氨氮去除量,输出电压和输出功率密度均最大(分别为498m V和295.24m W/m3)、内阻最小(244Ω)、总氨氮去除量最高(601mg);以体积比为50%的处理过的老龄垃圾渗滤液作为阴极液时,能够显著提高MFC系统的总硝酸盐氮的去除量。
[Abstract]:Because of its complex composition and poor biodegradability, the aged landfill leachate has always been a difficult problem in wastewater treatment. In recent years, the biological cathode microbial fuel cell has been developed because of its relatively cheap construction cost and anode chamber. The cathode chamber has the ability to remove the substrate pollutants, which has become an effective new technology for the treatment of the leachate of the aged refuse. In this paper, the biocathode biofilm microorganism fuel cell is constructed to treat the leachate of the aged refuse. The electrogeneration characteristics of biocathode MFC were studied when the anodic to cathode area ratio and the treated landfill leachate were used as cathode solution. The effect of anode substrate and cathodic solution treatment. The electrode area is an important factor affecting the performance of MFC. The experimental results show that, The output voltages of the three groups of biological cathode microbial fuel cells with anodic to cathode area ratio of 1: 2: 2: 2: 1 were 408 / 4522 / 396mV, respectively, and the maximum electric power density was 145.73237.6N / 136.50m / m ~ (3), respectively. The removal rate of internal resistance of 350,200,400 惟 COD was 21.18 ~ 20.200.20 / 22.31respectively. After 30 days of operation, the three groups of microbial fuel cells had been operated for 30 days. The concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in landfill leachate decreased. The removal rate of ammonia nitrogen was 80.88% 73.61% and 66.17%, respectively. The removal efficiency was related to the electrical properties. The cathode solution was an important factor affecting the performance of MFC. The experimental results showed that the concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in landfill leachate were 80.88%, 73.61% and 66.17%, respectively. The removal rate of COD, ammonia nitrogen and nitrate nitrogen in the treated old landfill leachate as cathode fluid was increased by 33.744.32% and 17.92% respectively compared with the traditional process, while the treated old landfill leachate with volume ratio of 75% was used as cathode liquid, the removal rate of COD, ammonia nitrogen and nitrate nitrogen was increased by 33.744.32% and 17.92%, respectively, when the treated landfill leachate with volume ratio of 75% was used as cathode liquid, It can significantly improve the power generation effect of MFC and the removal of total ammonia nitrogen in the system. The output voltage and output power density are the highest (498mV and 295.24mW / m3, respectively), the minimum internal resistance is 244惟 ~ (-1), and the total ammonia nitrogen removal is the highest (601mgN). When the treated landfill leachate with volume ratio of 50% is used as cathode liquid, The removal rate of total nitrate nitrogen in MFC system can be increased significantly.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O646.54;TM911.45

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