Choi Jeongdong, Ahn Youngho
Department of Civil Engineering, Yeungnam University, Gyungsan, 712-749, South Korea.
Bioprocess Biosyst Eng. 2014 Dec;37(12):2549-57. doi: 10.1007/s00449-014-1232-3. Epub 2014 Jun 19.
Raw primary sludge and the prefermentation liquor (PL) of primary sludge were used to generate electricity in single-chambered air-cathode microbial fuel cells (MFCs). The MFCs treating the primary sludge produced 0.53 V and 370 mW/m(2) for the maximum potential and power density, respectively. In the primary sludge-fed MFCs, only 5 % of the total energy production was produced from direct electricity generation, whereas 95 % of that resulted from the conversion of methane to electricity. MFCs treating the PL generated the maximum potential of 0.58 V and maximum power density of 885 mW/m(2), respectively. In the energy production analysis, direct electricity production (1,921 Wh/kg TCODrem) in the MFCs treating the PL was much higher than that of the primary sludge-fed MFC (138 Wh/kg TCODrem). Volatile suspended solids during 10 days were reduced to 18.3 and 38 % in the primary sludge-fed MFCs and prefermentation reactor, respectively. These findings suggest that a two-stage process including prefermentation and MFCs is of great benefit on sludge reduction and higher electricity generation from primary sludge.
采用原初沉污泥和初沉污泥的预发酵液（PL）在单室空气阴极微生物燃料电池（MFC）中发电。处理初沉污泥的MFC产生的最大电势和功率密度分别为0.53 V和370 mW/m²。在以初沉污泥为原料的MFC中，总发电量中只有5%来自直接发电，而95%是由甲烷转化为电能产生的。处理PL的MFC产生的最大电势和最大功率密度分别为0.58 V和885 mW/m²。在能量生产分析中，处理PL的MFC中的直接发电量（1921 Wh/kg TCODrem）远高于以初沉污泥为原料的MFC（138 Wh/kg TCODrem）。在以初沉污泥为原料的MFC和预发酵反应器中，10天内挥发性悬浮固体分别减少到18.3%和38%。这些发现表明，包括预发酵和MFC的两阶段工艺对于初沉污泥的污泥减量和更高的发电具有很大益处。
