Denitrification

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Leopold® elimi-NITE® 2.0 Denitrification System

The Solution for Reducing Nitrogen in Wastewater Effluent

The Leopold® elimi-NITE® 2.0 denitrification system is an attached growth, microbiologicol process. It is ideal for removing nitrogen from wastewater when the nitrogen is predominantly in the form of nitrate.

Product Description

The Leopold elimi-NITE 2.0 denitrification system consists of a gravity downflow packed-bed filter with a carbon source (methanol, acetic acid, molasses, etc.) located upstream. The media in the packed-bed filter—a coarse, hard, predominantly siliceous material—provides the support system to which the denitrifying microorganisms attach. The carbon source supplements the nitrified influent, providing the microorganisms in the filter media with a degradable carbonaceous material to metabolize nitrogen.

The packed-bed filter is well-suited for denitrification because it provides the necessary hydraulic detention time for the biological reaction to take place. It also filters out solids, eliminating the need for downstream filtration or clarification units required of other denitrification systems.

Leopold® elimi-NITE® 2.0 Denitrification System Features & Benefits

  • The Leopold® elimi-NITE® 2.0 denitrification system harneses the advantages of deep-bed, mono-media filters to effectively and efficiently remove nitrate-nitrogen in wastewater effluent. In addition to nitrogen, an elimi-NITE 2.0 denitrification system can remove suspended solids, including precipitated phosphorus.

  • Biological Denitrification

    Converts nitrate-nitrogen to harmless nitrogen gas in an attached growth, microbiological system, removing nearly all nitrate-nitrogen, achieving levels of below 1 mg/L.

  • Deep Bed Filtration

    Simultaneous effluent suspended solids removal with denitrification. Handles wide swings in solids loading while providing long filter runs.

  • Downflow Design

    Works with gravity, eliminating the need to pump influent through the media, combining reduced power consumption and high filtration rates (10+ m/hr or 4 gpm/ft2).

  • Combined Air/Water Backwash

    Superior media cleaning; low backwash water consumption (< 2%).

  • Flexibility in Filter Design

    Not restricted to one type of filter layout based on underdrain design limitations. System can be designed to a variety of site conditions or to existing filter basins.

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