ABSTRACT
This chapter presents system designs, performances, and cost data for representative systems, and discusses some basic aspects of ozone technology and its many applications in treating potable water. When ozone is generated by ultraviolet (UV) radiation, it is customary, particularly for small systems, not to dry the air. This is because the lower applied UV energy does not result in formation of nitrogen oxides. In many small applications UV generation of ozone can be practical, whereas UV generation at large water treatment plants is prohibitively higher in cost than corona discharge. Oxygen concentrators often replace air desiccation units so as to feed oxygen-enriched air to the ozone generators, thus producing higher gas phase ozone concentrations on small scale, thus avoiding the need for on-site oxygen production and/or storage facilities. One of the most frustrating aspects to vendors of ozonation equipment is the lack of understanding the various aspects of ozone technology by state and local water supply regulators.
