Environmental Protection

Severn Trent Recognized for Technologies

Severn Trent Services received the Environmental Business Journal’s Technology Merit Award in the Water/Wastewater category recently. The company was recognized for two advances in municipal and industrial water and wastewater treatment technology: a biological nutrient removal system and a microwave-based ultraviolet (UV) disinfection system.

The company's patented biologically active reactor system utilizes a three-stage biofiltration method consisting of a pre-denitrification process for the first stage, followed by a biological aerated filter for the second stage and a Denite® denitrification filter for the polishing filter. This system can be added to an existing or new facility, improving efficiency and minimizing space usage. A two-month pilot study in Jiashan, China, demonstrated that the system was able to deliver final effluent quality that met the country’s new Class IA Effluent Discharge Standards. The pilot study led to the design and construction of a 20,000 cubic-meter-per-day wastewater treatment plant in Jiashan.

The company’s MicroDynamics™ microwave UV disinfection system uses microwaves from unique electrode-less lamps to generate monochromatic UV light. With electrodeless lamps, there are no electrical connections to fail, corrode, or leak, increasing safety and reducing required maintenance. The lifespan of the lamps potentially exceeds 30,000 hours, minimizing waste and reducing operating costs.

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