Fixed-film Biological Dentrification

Advanced wastewater treatment requires a multiple barrier, disinfection and filtration approach to meet stringent effluent discharge limits. The key to the success of an advanced wastewater treatment program is tertiary filtration capable of consistently producing a high quality effluent while enhancing the disinfection process - both chlorination and UV - and improving water quality. Good tertiary filters offer the benefit of lowering total suspended solids (TSS), turbidity, biological oxygen demand and nutrient removal to meet the required discharge permits.

From the standpoint of cost and technical efficiency, biological treatment has proven to be an excellent tertiary treatment technology for municipal wastewater applications. Deep bed denitrification has been a popular tertiary treatment choice since the technology was patented in 1979.

The TETRA® biofiltration systems, designed by Severn Trent Services, have been installed throughout the world for organic oxidation, nitrification and denitrification in secondary, tertiary and advanced wastewater treatment applications for more than 20 years.The TETRA DeepBed™ Denite® system is a fixed-film biological denitrification process that also serves as a deep bed filtration system capable of removing suspended solids. With simultaneous removal of total suspended solids and achieving 1 ppm nitrate-nitrogen (NO3-N) and 3 ppm total nitrogen (TN) or less, the TETRA system integrates with other treatment processes to provide effective TN and phosphorous removal.

While new and improved wastewater treatment technologies are continuously being developed, fixed-film biological deep bed denitrification filters continue to set the standard for meeting the lower, more stringent, total nitrogen limits required for advanced wastewater treatment. The technology of combining denitrification and solids removal in a deep bed filter process has helped to dramatically improve wastewater quality at treatment plants across the world.

To learn more about the TETRA advanced wastewater treatment systems, visit Severn Trent Services at SIWW Booth H22. www.severntrentservices.com

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