Abstract

Microorganisms from three different physiological groups (sulphate-reducing, iron (III)-reducing and fermenting bacteria) were used to generate electricity by means of two-sections microbial fuel cells. The power generation by this system varied within a large area (from 250 to 3200 mW/m2) and depended on the type,form and quantity of the organic donors of electrons, the enzymatic activities of the microorganisms in the anodic section and the efficiency of aeration in the cathodic section.