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

摘要

PURPOSE:To prevent the generation of sulfide ions hindering methane fermentation by adding a surfactant selectively hindering the growth of sulfate reducing bacteria coexisting with methane bacteria to org. waste water contg. sulfate ions and by carrying out anaerobic fermentation. CONSTITUTION:The surfactant selectively hindering the growth of sulfate reducing bacteria coexisting with methane bacteria is added to org. waste liquor contg. sulfate ions such as waste water from an alcohol distilling stage or waste liquor from a pulp mill and the waste liquor is treated by anaerobic fermentation. The surfactant may be tween-60, octadecyltrimethylammonium chloride, dodecylbenzenesulfonic acid, cetyltrimethylammonium bromide or cetylpyridium bromide. 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.