This volume covers the technology of Ozone, its production and applications in various fields. This is written by a team of experts who have actually involved themselves in promoting the use of Ozone. There are totally fourteen chapters which give a complete technological information about Ozone gas in general, how it can be generated, how to design Ozone reactors and how to apply it for various applications. More important is the development of circuits for generating Ozone as well as the in situ Ozone System newly developed by the author's group. Applications of Ozone in water and waste water treatment are covered by experts in the field as also the use of Ozone for Tannery effluent treatment and Textile applications. The volume contains useful technical information for the effluent treatment areas. There is a chapter on Ozone for mosquito control and another on its use for medical applications. Food and biological treatment applications are also covered. This monograph has been prepared with the support of the Department of Science and Technology through its USERS Scheme.