METHOD FOR INHIBITING REDUCTION OF SULFATE IN ANAEROBIC TREATMENT AND ANTIBIOTIC HINDERING GROWTH OF SULFATE REDUCING BACTERIA

摘要

PURPOSE:To prevent the generation of sulfide ions hindering methane fermentation by adding an antibiotic selectively hindering the growth of sulfate reducing bacteria coexisting with methane bacteria to org. waste liquor contg. sulfate ions and by carrying out anaerobic fermentation. CONSTITUTION:The antibiotic selectively hindering the growth of sulfate reducing bacteria coexisting with methane bacteria is added to org. waste liquor contg. sulfate ions such as waste liquor from an alcohol distilling stage or waste liquor from a pulp mill and the waste liquor is treated by anaerobic fermentation. The antibiotic may be bacitracin, carbenicillin sodium, cycloheximide, dihydrostreptomycin, fradiomycin sulfate or gentamycin sulfate crystals. By this method, the generation of sulfide ions hindering methane fermentation is prevented and the consumption of hydrogen necessary for methane formation by sulfate reducing bacteria is also prevented.