Process Water from Hydrothermal Carbonization – HTC Bio-Waste Treatment

Bio-Waste

 03/2018
Project No.

2018-10001

Country

Chur, Switzerland

Wastewater volume

7,300 m³ per Year

Organic pollution

COD 10,000 mg/l

Energy production

220 MWh per Year

Technology

Anaerobic wastewater treatment

Scope of delivery

Planning, approval planning,
manufacture/delivery, commissioning

Modules

Anaerobic wastewater treatment: 1 x AF-050.HC

At Andreas Mehli’s facility in Chur, highly loaded process water from the Hydrothermal Carbonization (HTC) process is treated efficiently using anaerobic technology. The HTC process converts biomass under pressure and high temperature into a coal-like material and highly contaminated water within just a few hours – a transformation that would otherwise take millions of years in nature.

The key challenge of this project lies in the extremely high organic load of the process water – a demanding task where FlexBio’s expertise truly excels. In collaboration with GRegio Energie AG (founded by Andreas Mehli), FlexBio installed modular systems for anaerobic digestion, gas purification, and gas storage, enabling the generated biogas to be effectively utilized.

This project not only marks a technical milestone but also represents the foundation of a strong partnership with Mehli: from a successfully completed project emerged the founding of GRegio Energie AG, now serving as FlexBio’s official representative in Switzerland.

Our Impact in Numbers

0

Delivered Projects

0

Ongoing Projects

0

Energy Generated (TWh)

0

CO₂ Reduction (tons)

Feedback

Urs Imlig

Appenzeller Milchspezialitäten AG

“The wastewater volumes kept increasing. FlexBio was able to provide us with a mobile pilot plant. After successful testing, the plant was quickly installed thanks to its modular design. And everything has been working very well and smoothly together.”

Alfred Oberlindober

CEO & Owner of the Private Brewery Schönram

“We are direct dischargers and, due to growth and the resulting increase in wastewater volumes, we reached the capacity limits of our existing treatment plant. In our search for a solution, we found FlexBio Technologie GmbH to be a competent partner. The cooperation has proven to be highly profitable. We particularly value the modular and flexible design, which can be expanded at any time.”

Josef Blüml

Halsbacher Qualitätsfleisch GmbH

“The compact container solution with drum screen, anaerobic stage, and MBR provides complete wastewater treatment. We are particularly pleased that we can reuse the treated water – this saves operating costs and is a real advantage for our environmental and sustainability goals.”

Ludger Seggering

Popp Feinkost GmbH

“Wastewater is full of energy. We were looking for a solution and found it with FlexBio – generating biogas from wastewater. We are satisfied with the installation of the plant. We are satisfied with the service. And we are satisfied with the results.”

Andreas Mehli

GRegio Energie AG

“FlexBio makes slurry valuable again! With the new farm biogas plant, FlexBio transforms slurry and organic waste into clean energy and high-quality natural fertilizer. In this way, sustainability becomes a real opportunity for agriculture – and the vision of paying for the tractor with slurry comes within reach.”

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