| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the propagation of Legionella bacteria by preventing a protozoan such as an ameba or the like from becoming the host of Legionella bacteria. <P>SOLUTION: An ammonia nitrogen-containing chemical agent and an available chlorine-containing chlorine agent for producing monochloramine are added to a liquid to be treated in a circulation purifying type water tank in a time zone other than the utilization time zone of the circulation purifying type water tank to produce monochloramine with concentration enough to accelerate the conversion of the protozoan to a cyst form. In the utilization time zone of the circulation purifying type water tank, only the available chlorine-containing chlorine agent is supplied to decompose monochloramine to make free chlorine remain and thereby to achieve sterilization and the deactivation of a virus simultaneously with the deactivation of the protozoan. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
