The water treatment equipment "Fuji ozonizer" introduced here is an ozone generator dependent on a glass lining method, and it is available in a series from very small to large size for different application purposes. Fuji Electric has already installed a number of ozone plants inside and outside of Japan primarily for water treatment including water and sewage treatment, tertiary human excreta treatment and decoloring of industrial waste water, through which the features of "Fuji ozonizer have been highly evaluated. Fuji Electric believes that its ozone technologies will remain contributable to environmental protection and resource preservation in extensive application fields.