| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the sulfide formation caused by sulfate-reducing bacteria by adding an anthraquinone compound into a river system containing sulfate- reducing bacteria and restricting the pH value of the above river system within a specific range. SOLUTION: The inhibition of sulfide formation is carried out by adding an anthraquinone compound as an aqueous slurry containing a surfactant into a river system containing sulfate-reducing bacteria (e.g. Desulfobacter postgatei or the like) and adjusting the above river system to the range of pH 7-9 by the use of an aqueous solution or the like of sodium hydroxide or the like. By adjusting the pH value, an anthraquinone compound of comparatively big particle diameter (e.g. 0.1-27μm or the like) can be used. Further, it is favorable that the concentration of anthraquinone in the above aqueous slurry is usually 50 wt.% or less. In addition, the anthraquinone compound is preferably added in amounts of 0.1 mg/l or more in the case of drain or the like containing a few microbial cell body number of the objective sulfate-reducing bacteria and 1 mg/l or more in the case of the river system, e.g. sludge or the like, containing a lot of microbial cell body number of the sulfate-reducing bacteria.
|
