
95Microbial Fuel Cells and Other Bio-Electrochemical Conversion Devices
resistance small. The separator can inhibit proton transfer and lead to pH
gradients between the electrode chambers, thus increase the internal resis-
tance. These offsetting needs to reduce oxygen transport and facilitate
proton transport makes it difcult to design separators. Low-cost cloths
have been advised to replace expensive membranes as an effective sepa-
rator for large-scale applications. A cloth-electrode assembly conguration
has proven to reduce the anode– cathode spacing to 0.6 mm and greatly
enhances the power generation [112]. In addition, separator deformation ...