Method for the treatment of waste water
AssigneeKawasaki Kasei Chemicals Ltd.
InventorsShigeaki Numata, Souichi Shibuya
Life of this patent
Estimating the term…
Abstract
A method for the treatment of waste water, which comprises treating waste water containing at least a sulfide-type malodorous substance, in the presence of a transition metal compound and hydrogen peroxide or a hydrogen peroxide-forming compound, wherein at least an iron family element compound and a vanadium family element compound are used as the transition metal compound.
Claims14
A method for the treatment of waste water, which comprises treating waste water containing at least a sulfide-type malodorous substance with an amount effective to remove the sulfide-type malodorous substance of a transition metal compound and hydrogen peroxide or a hydrogen peroxide-forming peroxide, wherein at least a compound of an iron family element which is iron, cobalt or nickel and a compound of a vanadium family element which is vanadium, niobium or tantalum are used as the transition metal compounds, the ratio of vanadium family element compound to the iron family element compound being 0.05 to 10 mol times.
A method for the treatment of waste water containing at least a sulfide-type malodorous substance and a more readily oxidizable substance, which comprises treating the waste water with an mount effective to remove the sulfide-type malodorous substance of a transition metal compound and hydrogen peroxide or a hydrogen peroxide-forming peroxide, wherein at least a compound of an iron family element which is iron, cobalt or nickel and a compound of a vanadium family element which is vanadium niobium or tantatium are used as the transition metal compounds,
- wherein the effectiveness of the iron family element compound and hydrogen peroxide or hydrogen peroxide-forming compound to remove the sulfide-type malodorous substance is decreased by the presence of the more readily oxidizable substance and the amount of vanadium family element compound being sufficient to improve the removal rate over that occurring when the iron family element compound and the hydrogen peroxide or hydrogen peroxide-forming compound are used in the absence of the vanadium family element compound.
Dependencies are inferred from the claim text.