Prevents property contamination.
Preserves water quality in lakes and rivers.
Protects public health.
Easily integrated with our Ecoflo biofilter.
Takes less space than traditional options.
Never damages your landscaping.
Processes tailored to your project’s needs.
Ideal for all treatment systems.
Exceptional results in all seasons.
What is nitrogen reduction?
Nitrogen reduction is a wastewater treatment solution for areas where effluent standards have been strengthened to protect public health and the diversity of delicate ecosystems.
Our nitrogen reduction options are easily integrated with our Ecoflo biofilter or added to the processes of commercial and municipal treatment plants.
They safely convert ammoniacal nitrogen into harmless nitrogen gas, helping keep pollutants out of groundwater and away from the lakes and rivers near your property.
Why is nitrogen reduction important?
Nitrogen helps plants grow, so it must be good for the environment, right?
True, nitrogen is a nutrient – a building block for plant life. But it’s also a pollutant in wastewater.
When an inadequate treatment system discharges nitrogen compounds into the environment, they eventually end up in groundwater and nearby watercourses. Once there, they can cause lasting damage.
Groundwater contaminated with nitrate (a nitrogen compound) is a serious public health concern. High nitrate concentrations in drinking water reduce our blood’s ability to transport oxygen. For infants, this form of oxygen deprivation can lead to a condition called methemoglobinemia (blue baby syndrome). In extreme cases, the condition can be fatal.
Lakes and rivers enriched with too much nitrogen becomes a breeding ground for excessive algae growth. These blooms prevent sunlight from reaching plants below the surface. As native species die in ever greater numbers, bacteria that feed on decaying plant matter multiply, consuming more and more oxygen until the water can no longer support life. Fish and amphibians leave the area if they can. They perish if they can’t.
Clearly, the cost of nitrogen contamination is significant, not only for our environment, but also for our health and economy:
- human illnesses and death
- livestock poisoning
- invasions of non-native species
- reduced biodiversity
- toxins and deformities in fish
- reduced waterfront property values
- limited enjoyment of lakes and rivers
- lost revenues for commercial fisheries
We recognize the dangers of this problem and we are proud to offer a solution: safe, effective, and reliable wastewater treatment with Rewatec nitrogen reduction technologies.
How do our residential nitrogen reduction systems work?
Wastewater first flows into a primary tank. Solids settle on the bottom of the tank and liquids flow into the Ecoflo biofilter for treatment.
Wastewater passes through the biofilter, percolating through an organic filtering medium that traps and removes pollutants. Ammoniacal and organic nitrogen are naturally converted into nitrates as part of this process.
After wastewater passes through the filter, it is pumped into a flow divider tank.
Flow divider and final dispersal
The pressurized flow divider returns one portion of treated wastewater to the primary tank, where nitrates transform into harmless nitrogen gas that is released into the air.
The remaining portion of treated wastewater is discharged and safely returned to the environment.
Residential nitrogen reduction system maintenance
We have a network of local partners, annually trained by us to maximize the life of your Ecoflo septic system and to protect your investment in your installation.
- 15-point Ecoflo biofilter inspection
- filter aeration to promote healthy bacterial activity
- filter scarification to ensure optimal biofiltration
- verification of flow divider components and performance
Our 8-year warranty for residential nitrogen reduction systems includes:
- all treatment-related parts and labour
- no clogging, excess sludge, or substandard performance
How do our commercial and municipal nitrogen reduction systems work?
Nitrogen that enters a sewer system is mostly in the form of organic compounds, such as those found in urine and fecal material. When these compounds mix with wastewater, a natural process quickly converts them into ammonium.
Nitrogen removal processes can be adapted to any of our commercial and municipal treatment systems:
- Ecoflo biofilter clusters
- Rewatec membrane bioreactors (MBR)
- Rewatec moving bed biofilm reactors (MBBR)
- Rewatec sequencing batch reactors (SBR)
When wastewater enters a treatment system, specialized bacteria called nitrifiers feed on available ammonium, converting it through a two-step process into a nitrogen compound called nitrate.
Following this process, wastewater is circulated away from the oxygen-rich zone favoured by nitrifiers, and into an anoxic (oxygen-depleted) zone for further treatment.
In the anoxic zone, there is another group of specialized bacteria called denitrifiers.
Denitrifiers do not require dissolved oxygen to breathe. Instead, they use the oxygen molecules attached to nitrate, breaking down the compound and producing harmless nitrogen gas that is released into the air.
After denitrification, wastewater continues downstream for additional treatment and, later, safe dispersal into the environment.
Commercial and municipal nitrogen reduction system maintenance
We have a network of technicians and local partners, annually trained by us to maximize the life of your commercial or municipal nitrogen reduction system and to protect your investment in your property.
When a technician visits your property, they will:
- inspect all components, including electromechanical equipment
- verify treatment performance
- adjust processes to maximize system performance (when required)