Department of Civil and Environmental Engineering, Hiroshima University, Kagamiyama 1 Chome 4-1, Higashi-Hiroshima 739-8527, Japan.
Department of Civil and Environmental Engineering, Hiroshima University, Kagamiyama 1 Chome 4-1, Higashi-Hiroshima 739-8527, Japan.
Bioresour Technol. 2014 Apr;158:225-30. doi: 10.1016/j.biortech.2014.02.035. Epub 2014 Feb 17.
The electricity generation behavior of microbial fuel cell (MFC) using the sludge collected from the riverbank of a tidal river, and the biodegradation of the sludge by the electricity generation are evaluated. Although the maximum current density (150-300 mA/m(2)) was higher than that of MFC using freshwater sediment (30 mA/m(2)), the output current was greatly restricted by the mass transfer limitation. However, our results also indicate that placing the anode in different locations in the sludge could reduce the mass transfer limitation. After approximately 3 months, the removal efficiency of organic carbon was approximately 10%, demonstrated that MFC could also enhance the biodegradation of the sludge by nearly 10-fold comparing with the natural biodegradation. We also found that the biodegradation could be identified by the behavior of oxygen consumption of the sludge. Importantly, the oxygen consumption of the sludge became higher along with the electricity generation.
利用潮汐河流岸边采集的污泥评估微生物燃料电池（MFC）的发电行为，以及污泥的发电生物降解。尽管使用河口污泥的最大电流密度（150-300 mA/m(2)）高于淡水沉积物（30 mA/m(2)）的最大电流密度，但输出电流受到严重的传质限制。然而，我们的结果也表明，将阳极放置在污泥的不同位置可以减少传质限制。大约 3 个月后，有机碳的去除效率约为 10%，表明与自然生物降解相比，MFC 还可以将污泥的生物降解提高近 10 倍。我们还发现，污泥的耗氧行为可以识别生物降解。重要的是，随着发电，污泥的耗氧量增加。
