Denitrification & Filtration System Removes Nitrogen & Suspended Solids in One Step

Jan. 2, 2018
Product helps treatment plants meet strict standards

The Tetra Denite system combines denitrification and filtration for the effective removal of nitrate-nitrogen and suspended solids in a single treatment step. The combined fixed-film biological denitrification process plus Tetra DeepBed filters can easily meet <2 nephelometric turbidity units or <5 mg/L total suspended solids (<2 mg/L typical). Due to the filter’s high loading capacity, the percent of dirty backwash water return is less than 4% (<2% typical) of the plant’s forward flow. The small-footprint system integrates well with other plant treatment processes.

Three components make the Tetra Denite system unique. First, the patented Tetra Snap-T underdrains support the media and, during backwash, start the distribution of air and water. Second, the mono-media sand has a low uniformity coefficient, a high sphericity and a high Mohs hardness, providing a system that can operate for decades with little or no media loss or degradation. Third, the proprietary TETRAPace algorithm controls the flow of supplemental carbon to the filter, optimizing carbon usage and minimizing residual total organic carbon in the treated effluent water.

More than 20 wastewater treatment plants in the Chesapeake Bay watershed—and hundreds more around the world—are using the Tetra Denite filter technology to meet stringent permit regulations of 3 mg/L total nitrogen and 0.3 mg/L total phosphorus. The Back River Wastewater Treatment Plant Denite installation on the outskirts of Baltimore, currently in the startup process, is one of the largest denitrification filters in the United States, with an average daily flow of 188 million gal per day (mgd) and peak flow of a 300 mgd.

Sponsored Recommendations

Blower Package Integration

March 20, 2024
See how an integrated blower package can save you time, money, and energy, in a wastewater treatment system. With package integration, you have a completely integrated blower ...

Strut Comparison Chart

March 12, 2024
Conduit support systems are an integral part of construction infrastructure. Compare steel, aluminum and fiberglass strut support systems.

Energy Efficient System Design for WWTPs

Feb. 7, 2024
System splitting with adaptive control reduces electrical, maintenance, and initial investment costs.

Blower Isentropic Efficiency Explained

Feb. 7, 2024
Learn more about isentropic efficiency and specific performance as they relate to blowers.

De Nora

May 25, 2022