Ozonation in Waste Water Treatment

Full-scale waste water ozone treatment facilities may roughly be defined as systems with a ozone generation capacity of more than 0.5 kg per hour. They can be found in various applications in all branches of industry, treating almost all types of waste waters. The operating conditions used in waste water ozonation are dependent on the type of industry and the kind of waste water. They can be grouped according to  

The discussion of full-scale ozonation systems for waste waters in the following sections is grouped according to the main removal goal of the application, analogous to that used in drinking water ozonation systems. 

In many full-scale applications the variable costs for energy and oxygen are regarded as economically decisive. Ozone and cost savings have often been achieved by the application of combined ozonation/biodegradation systems. Today, in most cases, ozonation of waste 

The most frequently used contactors in full-scale waste water ozonation systems are bubble column reactors equipped with diffusers or venturi injectors, mostly operated in a reactor-in-series counter-current continuous mode. Many full-scale ozone reactors are operated at elevated pressure (2-6 barabs) in order to achieve a high ozone mass transfer rate, which in turn increases the process efficiency. 

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