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WaterNOx - Advanced Nitrogen Removal Filter System
The WaterNOx™ is an advanced nitrogen removal filter designed to service smaller flows with less maintenance and energy consumption than standard submerged filters with backwashing. The WaterNOx™ is a variant of the standard biological anoxic filtration denitrification system with external carbon addition for nitrified influent. In new installations, the WaterNOx™ follows a nitrifying filter such as the Waterloo Biofilter. An inexpensive, easily digested carbon source is added to aid in the denitrification process. The WaterNOx™ effluent is then directed to a small polishing filter to remove excess organics before disposal.
In retrofit installations, the WaterNOx™ operates on a closed feedback loop receiving a portion of the effluent from the existing works, denitrifying it, and directing it back upstream to the septic tanks. The WaterNOx™ system also produces alkalinity that when directed back upstream further increases nitrification efficiency.
- Designed for ease of use, the WaterNOx™ is ideal for applications such as campgrounds, truck stops, restaurants, subdivisions, schools and offices where enhanced nitrogen removal is required but constant or complex maintenance is not possible.
- In new installations, final effluent total nitrogen of < 5 mg/L is achievable with proper design and maintenance. At a light industrial factory retrofit, a WaterNOx™ received only 25-30% of the total flow yet TN was reduced by an additional 50%.
WaterNOx™ offers numerous advantages over other nitrogen removal technologies thorough denitrification
- easy set-up and servicing
- no backwashing
- no aerobic sludge production
- very low energy usage
- permanent filter medium
- compact footprint
- safe, non-toxic carbon source
- quick recovery if disturbed
- new or retrofit installations