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Patrick Harden, P.E.
Product Manager

NxClear® Denitrification Filter System

Low nitrate discharge limits for wastewater treatment
The NxClear®​ Denitrification filter is a traditional deep-bed, down-flow media filter designed for maintaining bio-growth on the media to maximize the biological denitrification process. Evoqua’s complete systems include chemical feed equipment and online monitoring instrumentation for a total treatment system that is optimized to minimize chemical consumption costs.



  • Municipal and Industrial wastewater
  • Tertiary solids removal
  • Denitrification

 key benefits

  • Single stage filtration and denitrification process (cost-effective and save time)
  • HDPE type underdrains are durable and easy to install.
  • Easily expandable for increased flow rates


  • Advanced PLC for automated operation and
  • Isolated cells adapt to seasonal flow rates
  • Large, spherical media for easy cleaning
  • Complete, factory built systems for easy installation and hook-ups
  • Capacities from 10,000 gpd to 750,000 gpd or higher available
  • Duplex backwash pumps and air scour blowers included for effective media cleaning
  • Designed to handle a wide range of flows, allowing for high turndown capabilities NxClear® Denitrification Filter System