Barakat Nasser A M, Amen Mohamed Taha, Ali Rasha H, Nassar Mamdouh M, Fadali Olfat A, Ali Marwa A, Kim Hak Yong
Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt.
Microbiology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
Polymers (Basel). 2022 Apr 11;14(8):1542. doi: 10.3390/polym14081542.
Co-doped carbon nanofiber mats can be prepared by the addition of cobalt acetate to the polyacrylonitrile/DMF electrospun solution. Wastewater obtained from food industries was utilized as the anolyte as well as microorganisms as the source in single-chamber batch mode microbial fuel cells. The results indicated that the single Co-free carbon nanofiber mat was not a good anode in the used microbial fuel cells. However, the generated power can be distinctly enhanced by using double active layers of pristine carbon nanofiber mats or a single layer Co-doped carbon nanofiber mat as anodes. Typically, after 24 h batching time, the estimated generated power densities were 10, 92, and 121 mW/m for single, double active layers, and Co-doped carbon nanofiber anodes, respectively. For comparison, the performance of the cell was investigated using carbon cloth and carbon paper as anodes, the observed power densities were smaller than the introduced modified anodes at 58 and 62 mW/m, respectively. Moreover, the COD removal and Columbic efficiency were calculated for the proposed anodes as well as the used commercial ones. The results further confirm the priority of using double active layer or metal-doped carbon nanofiber anodes over the commercial ones. Numerically, the calculated COD removals were 29.16 and 38.95% for carbon paper and carbon cloth while 40.53 and 45.79% COD removals were obtained with double active layer and Co-doped carbon nanofiber anodes, respectively. With a similar trend, the calculated Columbic efficiencies were 26, 42, 52, and 71% for the same sequence.
通过向聚丙烯腈/二甲基甲酰胺静电纺丝溶液中添加醋酸钴，可以制备共掺杂碳纳米纤维垫。食品工业产生的废水被用作单室间歇式微生物燃料电池的阳极电解液，微生物则作为该电池的原料来源。结果表明，在使用的微生物燃料电池中，单一的无钴碳纳米纤维垫并不是理想的阳极。然而，通过使用原始碳纳米纤维垫的双活性层或单层共掺杂碳纳米纤维垫作为阳极，发电功率可显著提高。具体而言，在24小时的批处理时间后，单活性层、双活性层和共掺杂碳纳米纤维阳极的估计发电功率密度分别为10、92和121 mW/m²。作为对比，使用碳布和碳纸作为阳极来研究电池性能，观察到的功率密度分别为58和62 mW/m²，低于引入的改性阳极。此外，还计算了所提出的阳极以及使用的商业阳极的化学需氧量去除率和库仑效率。结果进一步证实了使用双活性层或金属掺杂碳纳米纤维阳极优于商业阳极。从数值上看，碳纸和碳布的化学需氧量去除率分别为29.16%和38.95%，而双活性层和共掺杂碳纳米纤维阳极的化学需氧量去除率分别为40.53%和45.79%。按照类似的趋势，相同顺序下计算出的库仑效率分别为26%、42%、52%和71%。
