Abstract：
Laminar-flow microfluidic microbial fuel cell (LMMFC) has attracted attention due to the advantage of the liquid-liquid interface between anolyte and catholyte without the use of membrane as a separator resulting in less fabrication cost. Unlike previous studies of LMMFC using syringe pumps, this study proposes the use of osmotic pumps to feed anolyte and catholyte in the microchannel without any additional power supply. The osmotic pump was constructed with two cylindrical chambers separated by a forward osmosis membrane, with the initial draw solution concentration of 90 g l-1 NaCl. We have, for the first time, demonstrated using the osmotic pumps to deliver both anolyte and catholyte and create co-laminar flow in LMMFC. Under the catholyte and anolyte flow rates of 18 ml/h and 40 ml/h respectively, LMMFC cultivated with Shewanella oneidensis produced the maximum power density of 87 mW m-2 and current density of 747 mA m-2 with the internal resistance of 1660 Ω. Further studies are warranted to develop osmotic pumps-fed LMMFC into a potential platform for portable biosensors.
摘要：
层流微流体微生物燃料电池（LMMFC）由于阳极电解液和阴极电解液之间的液-液界面的优势而引起了关注，而无需使用膜作为分离器，从而降低了制造成本。与以前使用注射泵的LMMFC研究不同，这项研究建议使用渗透泵在微通道中供给阳极电解液和阴极电解液，而无需任何额外的电源。渗透泵由两个由正向渗透膜隔开的圆柱形室构成，初始汲取溶液浓度为90gl-1NaCl。我们有,第一次,证明了使用渗透泵输送阳极电解液和阴极电解液并在LMMFC中产生共层流。在阴极电解液和阳极电解液流速分别为18ml/h和40ml/h的条件下，用Shewanellaoneidensis培养的LMMFC产生的最大功率密度为87mWm-2，电流密度为747mAm-2，内阻为1660Ω。有必要进行进一步的研究，以将渗透泵喂养的LMMFC开发为便携式生物传感器的潜在平台。
