Department of Environmental Engineering, Marmara University, 34722 Goztepe, Istanbul, Turkey.
Water Sci Technol. 2011;64(4):789-95. doi: 10.2166/wst.2011.595.
Acidogenic fermentation of organic municipal solid waste (MSW) and the bio-electricity production potential from its volatile fatty acid (VFA)-rich leachate using an air-cathode microbial fuel cell (MFC) was investigated in this study. The acidogenic fermentation of 2 kg of MSW has been carried out in a 6 L anaerobic leach-bed reactor (LBR) under mesophilic conditions (30 degrees C). Total production of 92 g VFA expressed as chemical oxygen demand (COD) in 3 L leachate mainly containing acetic, propionic, butyric, and valeric acids has been achieved with manual leachate recirculation and without pH control in 74 days of incubation. Leachate collected on day 32 was used as a feed to an air-cathode MFC after being diluted and supplemented with NaCl or NaHCO3. The maximum power density in the diluted leachate was only 5.9 W/m3, but reached up to 8.6 W/m3 upon the addition of 7 mmol/L NaCl. Increase in coulombic efficiency from 6 to 22% was also observed as a result of NaCl supplementation. On the other hand, NaHCO3 addition did not improve the power output.
本研究探讨了利用空气阴极微生物燃料电池（MFC）对有机城市固体废物（MSW）进行产酸发酵以及从其富含挥发性脂肪酸（VFA）的渗滤液中生产生物电能的潜力。在 30°C 的中温条件下，将 2 公斤 MSW 在 6L 厌氧渗滤床反应器（LBR）中进行产酸发酵。在 74 天的培养过程中，通过手动渗滤液循环和不进行 pH 控制，在 3L 渗滤液中总共产生了 92g 以化学需氧量（COD）表示的 VFA，其中主要含有乙酸、丙酸、丁酸和戊酸。在第 32 天收集的渗滤液在稀释后并添加 NaCl 或 NaHCO3 后用作空气阴极 MFC 的进料。在稀释的渗滤液中，最大的功率密度仅为 5.9W/m3，但添加 7mmol/L NaCl 后可达到 8.6W/m3。添加 NaCl 还可将库仑效率从 6%提高到 22%。另一方面，添加 NaHCO3 并没有提高功率输出。
