Lactate Oxidation Coupled to Iron or Electrode Reduction by Geobacter sulfurreducens PCA

Abstract

ABSTRACTGeobacter sulfurreducensPCA completely oxidized lactate and reduced iron or an electrode, producing pyruvate and acetate intermediates. Compared to the current produced byShewanella oneidensisMR-1,G. sulfurreducensPCA produced 10-times-higher current levels in lactate-fed microbial electrolysis cells. The kinetic and comparative analyses reported here suggest a prominent role ofG. sulfurreducensstrains in metal- and electrode-reducing communities supplied with lactate.