Welcome to Circe Biotechnologie GmbH!
Fermenting the way to a more resilient and sustainable future
Welcome to Circe Biotechnologie GmbH!
Fermenting the way to a more resilient and sustainable future
Fermenting the way to a more resilient and sustainable future
Fermenting the way to a more resilient and sustainable future

We are the fermentation people! Reimagining one of the earliest processes of life on earth to create modern solutions for agriculture, aquaculture and bioplastics: Climate-resilient and climate-friendly, scalable solutions.
We research tiny microbes to enable huge scale solutions, not laboratory concepts and neat ideas but industrial volume, sustainable food, feed and packaging – MEGA FACILITIES
Our core tech platform enables versatile manufacturing solutions for multiple protein and plastic derivatives. Our patented "combined process" and "innovative mixing" utilises waste gasses, even capturing CO₂ to fuel innovative sustainable products. Selection of our patents: WO2024124267, WO2024228166, WO2025097199, A50144/2026
Naturally fermented bacteria make a powerful 70% protein and ideal essential amino acid blend. A sustainable alternative to fishmeal in aquaculture and farmed animal nutrition, as well as pet food - climate resilient and at scale! Bacterial single-cell protein (SCP). Approved as feed ingredient as per Regulation 2022/4474.
Circe´s powerful protein allows high nutrition levels to be taken on, in small meal sizes. Older people, hospital patients and explorers need as much "fuel" as possible from each spoonful eaten. Isolate of protein (IOP) - for hybrid products or protein-rich foods, with low environmental footprint - CO2, water use, land use.

Polyhydroxyalkanoates (PHA)- a complex word for a simple product – "base plastics". Made naturally @Circe from non-sugar feedstocks. PHA are fully biodegradable, also in the marine environment. They are thermoplastic materials with applications way beyond packaging.
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