State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin 150090, China.
Bioresour Technol. 2011 Jan;102(1):411-5. doi: 10.1016/j.biortech.2010.05.059. Epub 2010 Jun 17.
Biodiesel production through transesterification of lipids generates large quantity of biodiesel waste (BW) containing mainly glycerin. BW can be treated in various ways including distillation to produce glycerin, use as substrate for fermentative propanediol production and discharge as wastes. This study examined microbial fuel cells (MFCs) to treat BW with simultaneous electricity generation. The maximum power density using BW was 487 ± 28 mW/m(2) cathode (1.5A/m(2) cathode) with 50mM phosphate buffer solution (PBS) as the electrolyte, which was comparable with 533 ± 14 mW/m(2) cathode obtained from MFCs fed with glycerin medium (COD 1400 mg/L). The power density increased from 778 ± 67 mW/m(2) cathode using carbon cloth to 1310 ± 15 mW/m(2) cathode using carbon brush as anode in 200 mM PBS electrolyte. The power density was further increased to 2110 ± 68 mW/m(2) cathode using the heat-treated carbon brush anode. Coulombic efficiencies (CEs) increased from 8.8 ± 0.6% with carbon cloth anode to 10.4 ± 0.9% and 18.7 ± 0.9% with carbon brush anode and heat-treated carbon brush anode, respectively.
通过脂类的酯交换反应生产生物柴油会产生大量含有主要成分甘油的生物柴油废（BW）。BW 可以通过多种方式处理，包括蒸馏以生产甘油、用作发酵丙二醇生产的基质以及作为废物排放。本研究考察了微生物燃料电池（MFC）来处理 BW 并同时发电。使用 BW 的最大功率密度为 487±28 mW/m(2)阴极（1.5A/m(2)阴极），以 50mM 磷酸盐缓冲溶液（PBS）为电解质，与从用甘油培养基（COD 1400 mg/L）喂养的 MFC 获得的 533±14 mW/m(2)阴极相当。在 200mM PBS 电解质中，从使用碳纤维布的 778±67 mW/m(2)阴极增加到使用碳纤维刷的 1310±15 mW/m(2)阴极时，功率密度增加。使用热处理的碳纤维刷阳极时，功率密度进一步增加到 2110±68 mW/m(2)阴极。库仑效率（CE）从碳纤维布阳极的 8.8±0.6%增加到碳纤维刷阳极的 10.4±0.9%和热处理碳纤维刷阳极的 18.7±0.9%。
