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Hydrell Systems

Energy and nutrients reclaimed from domestic wastewater treatment plants

August 2021
Gallery Hydrell Systems 1
Gallery Hydrell Systems 1


Hydrell technology was invented in 2016. It has developed a wastewater treatment technology that allows the recovery of energy, nutrients, and clean water at a much smaller footprint and price than competing technologies. The technology will also be more robust than current comparable systems. Using the Hydrell technology, users have an incentive to treat their wastewater by saving 30%+ of their total operating costs. In its simplest form, the electrolysis of wastewater is catalysed by electroactive microorganisms oxidising organic and inorganic compounds on the anode (the positive electrode). The reaction products are car­bon dioxide (CO2) and nitrogen gas (N2). At the same time, hydrogen gas (H2) is formed on the cathode and converted to methane by methanogenic microbes.

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Label Date August 11, 2021
By Hexem
From Switzerland
Maturity stage Prototype testing 1:1 in the lab
Looking For Network, Funding, Credibility

The environmental benefits

  • Five times smaller footprint than upflow anaerobic sludge blanket reactors
  • Can produce 50 m3/m3 (methane/wastewater) with high strength wastewater
  • Up to 90% aerial footprint reduction
  • More than 3 million m3 wastewater treated every year
  • More than 50 GWh each year
  • More than 20,000 tons CO2 saved each year

The Financial benefits

  • Five years breakeven
  • CHF 300,000 customer benefit each year from energy savings and generation

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile


Hexem makes plug and play wastewater treatment systems that produce biogas.

View company profile Solution website
Headquarters 1897 Evouettes, Switzerland
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Hexem has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.