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WaterNOx - Model BAF -Nitrogen Removal Filter
The WaterNOx BAF 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. 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, 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.
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 receives only 25-30% of the total flow yet TN was reduced by an additional 50%.
The WaterNOx offers many operational and performance advantages over other nitrogen removal technologies including:
- 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