Читать книгу Clinical Guide to Fish Medicine - Группа авторов - Страница 125

After mechanical and biological filtration, other materials such as color‐producing organics and infectious agents (primarily bacteria and viruses) need to be addressed through disinfection. Point contact disinfection is a process whereby water is diverted in a side‐stream fashion to be in contact with a sterilizing agent (e.g. UV or ozone) and then recycled back to the system. To improve water quality, the rate of side‐stream treatment must exceed the rate of system contamination (i.e. bacterial growth in the region holding the animals). UV can have an additive or synergistic effect when used with ozone in series, reducing the required applied dose of each. Bulk‐fluid disinfection is a process whereby a residual oxidant (e.g. liquid chlorine, chlorine dioxide, hydrogen peroxide, or sodium hypochlorite) is added to the main system. This should never be used with fish and aquatic invertebrates.