Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Boulder, CO 80309, United States.
Department of Mechanical Engineering, University of Colorado, Denver, CO 80204, United States.
Bioresour Technol. 2014 Apr;157:114-9. doi: 10.1016/j.biortech.2014.01.058. Epub 2014 Jan 24.
Wood-based biochars were used as microbial fuel cell electrodes to significantly reduce cost and carbon footprint. The biochar was made using forestry residue (BCc) and compressed milling residue (BCp). Side-by-side comparison show the specific area of BCp (469.9m(2)g(-1)) and BCc (428.6cm(2)g(-1)) is lower than granular activated carbon (GAC) (1247.8m(2)g(-1)) but higher than graphite granule (GG) (0.44m(2)g(-1)). Both biochars showed power outputs of 532±18mWm(-2) (BCp) and 457±20mWm(-2) (BCc), comparable with GAC (674±10mWm(-2)) and GG (566±5mWm(-2)). However, lower material expenses made their power output cost 17-35US$W(-1), 90% cheaper than GAC (402US$W(-1)) or GG (392US$W(-1)). Biochar from waste also reduced the energy and carbon footprint associated with electrode manufacturing and the disposal of which could have additional agronomic benefits.
木质生物炭被用作微生物燃料电池电极，以显著降低成本和碳足迹。生物炭是由林业剩余物（BCc）和压缩磨碎剩余物（BCp）制成的。并排比较表明，BCp 的比表面积（469.9m²/g）和 BCc 的比表面积（428.6cm²/g）低于颗粒活性炭（GAC）（1247.8m²/g），但高于石墨颗粒（GG）（0.44m²/g）。两种生物炭的功率输出分别为 532±18mW/m²（BCp）和 457±20mW/m²（BCc），与 GAC（674±10mW/m²）和 GG（566±5mW/m²）相当。然而，较低的材料费用使它们的功率输出成本为 17-35 美元/W，比 GAC（402 美元/W）或 GG（392 美元/W）便宜 90%。废物制成的生物炭还减少了与电极制造相关的能源和碳足迹，而其处置可能具有额外的农业效益。
