Two stage bioethanol refining with multi litre stacked microbial fuel cell and microbial electrolysis cell.

Ethanol, electricity, hydrogen and methane were produced in a two stage bioethanol refinery setup based on a 10L microbial fuel cell (MFC) and a 33L microbial electrolysis cell (MEC). The MFC was a triple stack for ethanol and electricity co-generation. The stack configuration produced more ethanol with faster glucose consumption the higher the stack potential.

Scale-up of phosphate remobilization from sewage sludge in a microbial fuel cell.

Phosphate remobilization from digested sewage sludge containing iron phosphate was scaled-up in a microbial fuel cell (MFC). A 3litre triple chambered MFC was constructed. This reactor was operated as a microbial fuel cell and later as a microbial electrolysis cell to accelerate cathodic phosphate remobilization.

Microbial electrolysis cell accelerates phosphate remobilisation from iron phosphate contained in sewage sludge.

Phosphate was remobilised from iron phosphate contained in digested sewage sludge using a bio-electric cell. A significant acceleration above former results was caused by strongly basic catholytes. For these experiments a dual chambered microbial electrolysis cell with a small cathode (40 mL) and an 80 times larger anode (2.

Probing electron transfer with Escherichia coli: a method to examine exoelectronics in microbial fuel cell type systems.

Escherichia coli require mediators or composite anodes for substantial outward electron transfer, >8A/m(2). To what extent non-mediated direct electron transfer from the outer cell envelope to the anode occurs with E. coli is a debated issue.

Microbial fuel cell enables phosphate recovery from digested sewage sludge as struvite.

Orthophosphate was mobilized from iron phosphate (FePO(4)) contained in digested sewage sludge by microbial fuel cell power. FePO(4) was reduced through electrons and protons obtained from metabolic activity of Escherichia coli. The process yielded up to 82% or 600 mg/l.