Note: If the enterprise adopts chemical disinfection method, it should stipulate the rinsing method of the residual chemical disinfectant after disinfection.
(ii) ozone disinfection: currently in the purified water system can continuously remove bacteria and viruses in the best method, but need to be installed in front of the point of use of ultraviolet lamps. Applicable to the disinfection of purified water piping.
(c) ultraviolet disinfection: wavelength 200nm ~ 300nm of ultraviolet light has a strong bactericidal ability, the best effect of light at 253.7nm, the installation location from the use of the point of the closer the better, and then installed after the removal of bacterial grade filters. Can be used in conjunction with thermal disinfection or chemical disinfection, conducive to the degradation of hydrogen peroxide and ozone
Note: UV lamp sterilization light intensity with time decay, there should be a light intensity detection or time recorder, in order to regularly clean or replace the ultraviolet lamp.
(D) Pasteur disinfection (thermal disinfection): purified water system used, less common. Generally maintain a temperature of 60 ~ 80 ℃ in the piping system, 30 ~ 60 minutes. Applicable to activated carbon filters, softeners and storage cycle piping.
(E) steam sterilization: mostly found in the preparation of water for injection. Water piping systems for injection should be able to be sterilized with pure steam (e.g., 121°C, 0.2 MPa). Storage tanks/pipes shall have sterilization and disinfection interfaces, and if steam sterilization is used, adequate evacuators shall be provided. Suitable for pressure-resistant containers and piping.