Purpose

A bioelectricity producing system was configured by connecting to a microbial electrolysis cell producing hydrogen, in which both systems were without mediator, to treatment the landfill leachate of the and generate bioelectricity and hydrogen.

Methods

The anode electrode was made with MWCNTs polyscale coating on graphite felt and the cathode electrode with activated carbon coating on carbon cloth. In the MFC-MEC coupled system, the electrodes were connected in series using copper wire. The system was set up in a fed-batch mode and the landfill synthetic leachate was injected into the anode MFC-MEC chamber as fuel.

Results

In MFC, the highest voltage, current density and power density were 1114 mV, 44.2A/m³ and 49.24 W/m³, respectively. The maximum of the coulombic efficiency system was 94.10%. The highest removed COD, NH₄-N and P was 97.38%, 79.56% and 74.61%, respectively. In the MEC, the maximum of voltage input, current density and power density was 1106 mV, 43.88 A/m³and 48.54 W/m³, respectively. The maximum coulombic efficiency system was 125.54%. Also the highest removed COD, NH₄-N and P was 97.46%, 78.81% and 76.25%, respectively. The highest biogas production rate and its yield were 39 mL/L.d, and 0.0118 L/g CODrem, respectively.

Conclusion

This study found that the MFC-MEC coupled system had promising potential for strong wastewaters treatment, such as the leachate of landfill; and the in-site use of generated electricity and the production of useful fuels such as biogas.

中文翻译：

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评估耦合 MFC-MEC 与石墨毡/MWCNTs 多尺度电极在垃圾渗滤液处理以及生物电和沼气生产中的性能

目的

通过连接产生氢气的微生物电解槽配置生物发电系统，其中两个系统都没有介体，以处理垃圾填埋场的渗滤液并产生生物电和氢气。

方法

阳极电极由石墨毡上的 MWCNTs 多层涂层制成，阴极电极由碳布上的活性炭涂层制成。在 MFC-MEC 耦合系统中，电极使用铜线串联。该系统以分批补料模式设置，垃圾填埋场合成渗滤液作为燃料注入阳极 MFC-MEC 室。

结果

在MFC中，最高电压、电流密度和功率密度分别为1114 mV、44.2A/m ³和49.24 W/m ³。库仑效率系统的最大值为94.10%。COD、NH ₄ -N和P的最高去除率分别为97.38%、79.56%和74.61%。在MEC中，电压输入、电流密度和功率密度的最大值分别为1106 mV、43.88 A/m ³和48.54 W/m ³。最大库仑效率系统为125.54%。最高去除COD、NH ₄ -N和P分别为97.46%、78.81%和76.25%。最高的沼气产率和产率分别为 39 mL/Ld 和 0.0118 L/g CODrem。

结论

本研究发现，MFC-MEC 耦合系统在强废水处理方面具有广阔的潜力，例如垃圾填埋场的渗滤液；发电的现场使用和沼气等有用燃料的生产。