Puremust-SN®, the leading Spanish biological denitrification technology that has been certified by SGS to remove up to 1400 mg/l of nitrates in drinking water or osmosis rejects, four times more than ever before.


PUREMUST-SN® is our proprietary, patented, and certified system for the biological removal of nitrates in drinking or wastewater.

Our technology is based on a heterotrophic biological process that converts nitrates present in the water into nitrogen gas, effectively and sustainably eliminating them.

This technology reproduces the natural nitrate removal process but in an intensified, controlled and automated way. In addition, Puremust-SN® is an environmentally friendly solution with lower operating and investment costs compared to traditional technologies available on the market.


Our story began in 2016 when INGEOBRAS (Inngen.io) acquired the company NoNo3, which had initiated the development of the technology but had not succeeded in making it work effectively. With a clear vision of the potential of this project, we decided to invest in research and development (R&D) with the goal of creating our own biological denitrification technology.

After years of dedication to research, testing in pilot projects and real plants, we successfully brought the technology to its commercial phase. In 2018, we achieved a significant milestone by patenting the Puremust-SN® technology. Furthermore, we have obtained certification from SGS, a renowned international independent certifying entity.

Our technology is fully developed, tested, and safe. It has been approved and used in projects by various European Ministries of Health, including Spain’s, since 2017.


Puremust-SN® solution is the most competitive in the market from both a technical and economic perspective:

  • No contaminant discharge
  • Nitrate removal efficiency exceeding 95%
  • No residual COD in treated water
  • Natural, safe, and health-friendly bacteria – Group 1
  • Operates with a stoichiometric dose of carbon
  • No water wastage
  • At least 98% of the water entering the plant exits treated
  • Shorter hydraulic retention time (HRT)
  • Smaller space requirements
  • Lower investment costs
  • Operating cost below 0.15 USD/m3
  • Capable of working with water temperatures ranging from 3°C to 39°C
  • Environmentally friendly with a low carbon footprint
  • Certified by SGS and numerous references over the years
  • Patented

More and more companies are relying on Puremust-SN® for the treatment of their drinking water or wastewater. 

The technology, known for its compact solution as BIOBOX Nitrates, has numerous project references as success stories. 

Implementation period


Further information

We encourage you to discover the final product that incorporates Puremust-SN technology, called “BIOBOX Nitrates.”

These are prefabricated and 100% automated compact plants for the treatment of drinking water, wastewater, and reuse.

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