Production of Sulfur from Gypsum as an Industrial Byproduct

Biological sulfate reduction was investigated at the bench and pilot scales in order to determine optimum culture conditions. Efficient strains of sulfate-reducing bacteria (SRB) were selected by classical microbiological methods and by mutagenesis. Improvement factors, including stripping, scale-up, sulfate, and organic substrate concentrations, have been studied in batch bioreactors.