	US 11,753,318 B2
	*Disinfectant against Legionella, method for treating water, additive for bathtub water, and additive for air-conditioning cooling tower water*
Akihiro Kondo, Kusatsu (JP)
Assigned to HIYOSHI CORPORATION, Shiga (JP)
Appl. No. 16/630,546
Filed by HIYOSHI CORPORATION, Shiga (JP)
PCT Filed Dec. 13, 2018, PCT No. PCT/JP2018/045793 § 371(c)(1), (2) Date Jan. 13, 2020, PCT Pub. No. WO2020/044584, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 2018-160452 (JP), filed on Aug. 29, 2018.
Prior Publication US 2021/0061684 A1, Mar. 4, 2021
Int. Cl. C02F 1/50 (2023.01); A01N 59/16 (2006.01); C02F 103/02 (2006.01); C02F 103/42 (2006.01)

CPC C02F 1/505 (2013.01) [A01N 59/16 (2013.01); C02F 2103/023 (2013.01); C02F 2103/42 (2013.01); C02F 2303/04 (2013.01)]

12 Claims

1. A method for treating water, comprising:

a) bringing a non-naturally occurring target water into a state in which the non-naturally occurring target water contains an iron salt in a concentration of 0.1 mM or more, thereby suppressing or inhibiting proliferation of Legionella existing in the non-naturally occurring target water,

wherein the iron salt is at least one selected from the group consisting of iron (II) sulfate, ammonium iron (II) sulfate, ammonium iron (III) sulfate, iron (III) chloride, and polyferric sulfate.