Fig 5.

Lactate oxidation by acetate-grown biofilms in BESs. (A) Current generation coupled to acetate and then lactate use as electron donors. The addition of lactate to the anode chamber is shown with an arrow. (B) CLSM micrograph of lactate-oxidizing anode biofilms previously grown with acetate. The biofilms were stained with the BacLight viability dyes (green, live cells; red, dead cells). Top view and the corresponding projections in the x (bottom) and y (right) axes are shown. Scale bar, 20 μm.