Microvi MNE™ for Nitrate Removal

Nitrate removal solution for groundwater

The Microvi MNE™ Solution

Microvi MNE™ is the next generation biological process for water and wastewater treatment. The solution combines groundbreaking Microvi technology with proven WesTech process equipment for a cost-effective approach to biological treatment.

To learn more about the Microvi MNE process, visit the Microvi MNE page, or view the video below.

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Nitrate Removal for Drinking Water
Nitrate Removal for Wastewater

A Nitrate Removal Process With Minimal Waste

WesTech's exclusive nitrate removal process for drinking water, Microvi MNE, converts nitrate to nitrogen gas. It uses naturally occurring, nitrate-reducing microorganisms that are irreversibly retained with engineered polymeric composites, called biocatalysts. The microorganisms are maintained at extremely high densities and do not enter the bulk liquid.

Therefore, unlike alternative nitrate treatment options, the process does not produce biosolids or a concentrated brine or reject stream.

To read case studies for existing Microvi MNE installations for nitrate removal, view the Literature sidebar on this page.

^ back to topGroundwater Nitrate Removal – Drinking Water

Nearly two-thirds of the world's rivers and countless aquifers are threatened by nitrate contamination. Due to health concerns caused by nitrate, the EPA has set the maximum contaminent level (MCL) for nitrate in drinking water at 10 mg/L.

Historically, reverse osmosis and ion exchange have been commonly used to remove harmful nitrate from the water. However, those systems generate a concentrated waste stream that requires additional treatment and/or disposal.

Also, these methods can be energy-intensive and complex to operate.

Microvi MNE for Drinking Water Cost Comparison Chart

  1. Low Capital Cost – High-rate design, minimal upstream/downstream processing, and small footprint (due to low HRT) result in reduced CAPEX requirements.
  2. Low Operating Cost – Minimal microorganism growth significantly reduces chemical cost; no concentrated brine or reject stream cost.
  3. No Brine/Reject – Nitrate is eliminated by conversion into harmless nitrogen gas; therefore, no brine or reject water is generated in the bioreactor.
  4. Minimal Sludge – Microorganisms are retained within the biocatalysts, and the biocatalysts are retained within the bioreactor, resulting in minimal turbidity in the effluent.
  5. Low Energy Required – Bioreactor has few moving components, no backwashing/flushing, and no wasting or recycling, resulting in very low energy input requirements.
  6. <2% Water Loss – Single-pass bioreactor requires no backwashing or wasting, resulting in >98% water recovery.
  7. Easy Operation – Simple, automated controls and expertly designed bioreactor reduce required operator input and maintenance.

The Microvi MNE solution meets the urgent needs of communities around the world that require a simple, effective, and waste-free solution for treatment of high nitrate. It has passed stringent approvals for full-scale use in California and operated successfully for many years. The technology meets NSF/ANSI 61 certification.

Microvi MNE for Drinking Water Process Flow Diagram

^ back to top Nitrate Removal for Wastewater

The harmful effects of excess nitrogen in aquatic environments has been well documented. Wastewater treatment plants are under increasing pressure to lower discharge levels of nitrogen to protect and restore the thousands of estuaries, lakes, and rivers that have been impacted by elevated nutrient levels.

Effluent filtration and biological nutrient removal (BNR) have been commonly used for advanced nutrient treatment. To address tightening regulations, and to reduce the cost of expensive plant upgrades, advancements in BNR processes are required for nitrate removal from wastewater.

The Microvi MNE solution is ideal for simple, waste-free nitrate removal in new installations, plant upgrades, and retrofit applications.

Microvi MNE for Wastewater Benefits Chart

Microvi MNE for Wastewater Process Flow Diagram


  • Drinking water treatment
  • Municipal wastewater treatment