Key Details
Technology: Blue Nite® biological denitrification
ADVANTAGES
- Nitrate removal to <1 mg/L
- Unique patented control system
- Lowest capital and O&M
- Eliminates upsets, gas bumps, and high rate backwash cycling
APPLICATIONS
- Municipal wastewater treatment
- Industrial nitrate mitigations
- Existing treatment facilities needing end-of-pipe denitrification
- Blue PRO® installations for total nutrient removal
CASE STUDIES
- Bellefonte PA
- Aztec NM
- Military Base, Maryla
Our Technology: BlueNite® Biological Denitrification
NEI is the exclusive provider of BLUE NITE® biological denitrification, a simple, powerful technology for consistently lowering nitrates to <1 mg/L NOx-N. Blue Nite uses NEI’s Centra-flo® granular media filtration as an attached-growth platform in which heterotrophic bacteria can thrive and fully denitrify influent nitrates.
Why do you need a Blue Nite system?
Because nitrate and total nitrogen limits are proliferating in updated discharge permits across the continent, and the Blue Nite system provides a modular, end-of-pipe solution that means you never need to worry about whether you can meet your nitrate levels again.
Implementing Blue Nite biological denitrification has been shown to:
– Reduce nitrates to <1 mg/L
– Accommodate high or fluctuating influent nitrate levels
– Work with alternative carbon sources, such as
glycerin and acetate
– Work simultaneously in the same vessel with Blue
PRO® reactive filtration for phosphorus removal
to provide total nutrient removal.
HOW IT WORKS
FLOW WITHIN A BLUE NITE®
Blue Nite® systems utilize our Centra-flo® continuous backwash, upflow sand filters. A carbon source is dosed to the wastewater influent prior to entering the sand filters. In the Blue Nite system, fixed-film heterotrophic bacteria convert nitrates (NO3- and NO2-) to atmospheric nitrogen (N2). The composition of the bacterial population depends largely on the specific type of carbon utilized. Bacteria and solids wasting are facilitated by the continuous backwash of the Centra-flo filter. The media washbox removes solids and excess biomass, which are directed to a reject line. The clean sand then falls by gravity back to the media bed.
How the biological denitrification process actually works
The nitrogen gas produced during operation is primarily released from the process as the media passes through the airlift. Removal of gas in this fashion has several benefits that include: eliminating false readings in headloss, eliminating the need to backwash because of gas entrainment, and eliminating the gas bump or upset gas "burps" due to significant nitrogen bubble accumulation typical in static bed filters.
Fits easily into existing WWTFs
Can this system also be configured to remove phosphorus?
Learn more about the Blue PRO process, or contact us to find out how this capability could impact your plant.
HOW IT WORKS
BluNite® transform the pollutant nitrates into harmless atmospheric nitrogen gas
The Blue Nite process is the best way to consistently meet effluent nitrate or total nitrogen levels. Blue Nite installations consistently beat their permitted levels as low as <1 mg/L of nitrates in an end-of-pipe solution that is seamlessly compatible with Blue PRO® reactive filtration for phosphorus removal.
FAQS
What carbon source does blue nite use?
What carbon dosing ratio does blue nite use?
Can our blue nite installation be retrofitted at a later time for blue pro reactive filtration if we don’t need phosphorus removal yet?
Can the system be installed into pre-existing tanks?
Does the media need to be replaced or topped up?
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