Microorganism-inactivating agent
With a microorganism-inactivating agent comprising a composition containing γ-polyglutamic acid and/or cross-linked product of γ-polyglutamic acid; a calcium ion donor; a sodium ion donor; and an aluminum ion donor, microorganisms in water are inactivated. By further including one or more selected from microbiostatic agents and microbicides into the microorganism-inactivating agent, various microorganisms in water are inactivated to a level at which the water is suitable for drinking.
1 . A microorganism-inactivating agent comprising a composition containing γ-polyglutamic acid and/or cross-linked product of γ-polyglutamic acid; a calcium ion donor; a sodium ion donor; and an aluminum ion donor.
2 . The microorganism-inactivating agent according to claim 1 , further comprising one or more selected from microbiostatic agents and microbicides.
3 . The microorganism-inactivating agent according to claim 2 , wherein said microbiostatic agents and microbicides are cationic compound.
4 . The microorganism-inactivating agent according to claim 3 , wherein said cationic compound is polypeptide mainly consisting of basic amino acids.
5 . The microorganism-inactivating agent according to claim 4 , wherein said polypeptide is ε-poly-L-lysine.
6 . The microorganism-inactivating agent according to claim 5 , wherein the mass ratio between the contents of said composition and said ε-poly-L-lysine is 1:10 to 500:1.
7 . A method for inactivating a microorganism in water containing said microorganism, comprising a step of bringing a composition containing γ-polyglutamic acid and/or cross-linked product of γ-polyglutamic acid; a calcium ion donor; a sodium ion donor; and an aluminum ion donor into contact with said water containing said microorganism.
8 . The method according to claim 7 , wherein said step of bringing the composition into contact with water comprises adding said composition to said water containing said microorganism and stirring said water after the addition.
9 . The method according to claim 7 , wherein said microorganism belongs to the genus Staphylococcus.
10 . The method according to claim 7 , further comprising a step of bringing one or more selected from microbiostatic agents and microbicides into contact with said water containing said microorganism.
11 . The method according to claim 10 , wherein a composition containing γ-polyglutamic acid and/or cross-linked product of γ-polyglutamic acid; a calcium ion donor; a sodium ion donor; and an aluminum ion donor; and one or more selected from microbiostatic agents and microbicides are added to water at the same time and brought into contact with the water.
12 . The method according to claim 10 wherein said microbiostatic agents and microbicides are cationic compound.
13 . The method according to claim 12 , wherein said cationic compound is polypeptide mainly consisting of basic amino acids.
14 . The method according to claim 13 , wherein said polypeptide is ε-poly-L-lysine.
15 . The method according to claim 14 , wherein said composition is added to a concentration of 1 to 50000 ppm and said ε-poly-L-lysine is added to a concentration of 0.1 to 100 ppm.
16 . The method according to claim 14 , wherein said composition and said ε-poly-L-lysine is added such that the mass concentration ratio between them is 1:10 to 500:1.
17 . A method for producing drinking water comprising inactivating a microorganism in water by the method according to claim 10 .