SULFATE-REDUCING BACTERIA

The corrosion of sewers and the control of odor are the major operatio nal and maintenance problems in wastewater collection systems. The gen eration of hydrogen sulfide and subsequent sulfuric acid results from microbially mediated reactions, by sulfate-reducing bacteria (SBR) and sulfide-oxidizing bacteria. This review covers pertinent information about sulfate reduction-induced problems in general and SBR in particu lar. Metabolism with respect to carbon, energy, and sulfur sources, ec ology, growth factors (dissolved oxygen, temperature, pH, and sulfide) , and the competitive effects of methane-producing bacteria on SBR are discussed. Because metals react with sulfide to form metal sulfide pr ecipitates with extremely low solubilities, metal interactions in sulf ate reduction environments are discussed.