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About us

GRegio Energie AG in Chur

GRegio Energie AG was founded in 2017 and is based at Rheinmühleweg 64 in Chur. We develop HTC plants, build biogas and wastewater plants and distribute wood gasification modules.

Aerial view of the Rheinmühle in Chur with silo tower, fields and mountains in the background

What we do

GRegio Energie AG specialises in

  • development, planning, construction and service of HTC plants,
  • distribution and planning of wood gasification plants,
  • construction and commissioning of on-farm biogas plants with fixed-bed digester (GRegioflex) and of plants for industrial wastewater.

In every project we are your point of contact and contracting partner for the entire project.

View the four business areas
The GRegio team in green shirts in front of the pipework of the pilot plant
The GRegio team in 2024 in the HTC hall

The team

The GRegio team works within the Mehli Group. The staff are employed by Mehli Agro Service AG and deployed on projects of GRegio Energie AG. The board of directors runs the company.

The people behind the plants

  • Andreas Mehli leaning against a tractor door

    Andreas Mehli

    Founder and Chairman of the Board

  • Gina Parpan in front of a hedge

    Gina Parpan

    Head of Energiepark Grischa

  • Stefan Ungricht at an engine in the hall

    Stefan Ungricht

    Head of installation and project implementation

  • Cartoon microbe under a magnifying glass, character from the biogas explainer film

    Alex Treichler

    HTC project manager and process engineer

  • Ignaz Canova in front of a wooden wall, green GRegio shirt

    Ignaz Canova

    Head of technology

Board of directors

  • Andreas Mehli: Chairman
  • Ignaz Canova: Member
  • Laila Mehli: Member
  • Christian Bolliger: Member

Partners from research and the federal government

We work with universities and the federal government:

  • ZHAW in Wädenswil: investigation of the HTC process in the laboratory and at pilot scale.
  • Swiss Federal Office of Energy (SFOE): pilot and demonstration project ‘HTC Innovationscampus Rheinmühle’ 2018 to 2020 and, since April 2024, funding of the Energiepark Grischa.
  • University of Applied Sciences of the Grisons: partner in the Energiepark Grischa.
Open container with a forest backdrop and a floor of wood chips, the wood station at the Energiepark

The Energiepark Grischa

The Energiepark Grischa is a joint project and not a company in its own right. It is located at the Rheinmühle in Chur and uses interactive stations to show how energy is generated from biomass, sun, water and wind. Development began in 2021 at the Rheinmühle with an HTC project. The project sponsor is the Klima GRischa Klimastiftung Graubünden foundation, together with project partners. Since April 2024, the Energiepark has been implemented together with the University of Applied Sciences of the Grisons (FHGR), and the Swiss Federal Office of Energy (SFOE) funds the project. Further partners are involved. The first stage, with the wood energy, solar energy and hydropower stations, opened with an industry event on 28 August 2025 and to the public on 30 August 2025. Stage 1.2, with the wind energy, biogas and HTC stations and the observational film “Das Leben einer Kuh” (“The Life of a Cow”), opened on 24 October 2026. Gina Parpan manages the park.

The “Biomasse” (biomass) station compares biogas and HTC and shows how organic residues become energy and new raw materials. Since the opening in August 2025, 24 visits, guided tours and events with a total of 1,008 visitors have taken place (as of 9 September 2026).

Visit the Energiepark

More impressions: Wood and Solar

  • Wooden blocks and a red sample bottle on the forest wall of the Wood station
    Energiepark Grischa
  • Close-up: headphones with a green light ring on a spruce trunk
    Energiepark Grischa
  • Solar station: cityscape, screen and buzzer seen from the side
    Energiepark Grischa

The Biogas and HTC station

  • View into the Biogas and HTC station at the Energiepark Grischa: wall pictures of a cow barn, a screen and information panels inside the container
    Biogas and HTC station at the Energiepark Grischa
  • Green buzzer in front of a wall picture of a cow barn: visitors follow manure on its journey to energy
    Biogas and HTC station at the Energiepark Grischa
  • VR headset hanging on the wall of the Biogas and HTC station, with the silhouette of a cow next to it
    Biogas and HTC station at the Energiepark Grischa

News and media

  • Aqua & Gas, issue 2/2026: HTC technology in connection with sewage sludge as a route to net zero at wastewater treatment plants, together with the Buchs Sevelen Grabs Wastewater Association. Earlier articles: 3/2021 and 11/2024.
  • Swiss Federal Office of Energy (SFOE): technical article ‘In vier Stunden wird aus Bioabfall Kohle’ (in German; ‘In four hours, bio-waste becomes char’).
  • Bündner News, issue 37, August 2025: The Mehli Group magazine, 72 pages, with the GRegio section on pages 42 to 62.
  • Energiepark Grischa: opening of the first stage on 30 August 2025, opening of stage 1.2 on 24 October 2026.