Thiobacillus thiooxidans growth inhibitor
AssigneeHazama Corporation
InventorsTerunobu Maeda, Atsunori Negishi, Yasuo Nogami, Tsuyoshi Sugio
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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.
Claims14
A composition comprising (1) a material selected from the group consisting of concrete, mortar and high molecular weight polymers, and (2) an effective amount of a growth inhibitor for Thiobacillus thiooxidans selected from the group consisting of tungsten and tungsten compounds.
A method of inhibiting the growth of Thiobacillus thiooxidans bacteria, comprising contacting the bacteria with an effective amount of tungsten or a tungsten compound.
Dependencies are inferred from the claim text.