The disinfection system from Severn Trent Services-Apliclor uses MicroDynamics microwave UV technology combined with Aquadiox chlorine dioxide generators to treat wastewater for a variety of reuse applications, while reducing the plant’s effluent discharge volume. The MicroDynamics system uses microwave energy to energize UV lamps, generating consistent-strength disinfection. The MicroDynamics system uses the MicroPace control system for real-time flow pacing, thereby reducing energy requirements and delivering cost efficiencies.

The Aquadiox chlorine dioxide generator will produce chlorine dioxide on site to provide residual disinfection, preventing bacteria from forming in the plant’s distribution network. This alternative disinfection method uses sodium chlorite and hydrochloric acid to generate the chlorine dioxide solution. One of the benefits of using chlorine dioxide disinfection is that it reacts less with organic matter present in the distribution network, thus eliminating odours and minimizing the formation of trihalomethanes.

Rick Bacon, general manager, Severn Trent Services-Apliclor, said: “The innovative microwave UV technology has been recognized for advancing the state of the art in wastewater treatment. The MicroDynamics system combined with the chlorine dioxide generators will provide assurance for users that all water in the Reus network – including the water in the pipes and at the point of use – is treated safely.”