| abstract |
A Thiobacillus thiooxidans growth inhibitor containing as the active ingredient at least one substance selected from the group consisting of a tungsten powder and tungsten compounds. Under acidic conditions of pH value of 4 or less, this growth inhibitor sufficiently inhibits the growth of T. thiooxidans. When added in a very small amount to, for example, a structural material such as concrete in a sewage disposal plant, etc., it can therefore inhibit the growth of T. thiooxidans without substantially decreasing the strength, etc. of the structural material per se. |