| Year of construction | 2017 |
| Project No. | 2017-10001 |
| Country | Hesse, Germany |
| Substrate | 1,000 m³ of liquid manure and 500 tonnes of maize silage per year |
| Energy production | 1.600 MWh per year |
| Technology | Biogas – hydrolysis, fixed-bed fermenter, solid fermentation (fully mixed reactor) and fermentation residue storage |
| Scope of delivery | Planning, approval planning, |
| Modules | Hydrolysis: 60 m³ Fixed bed reactor: 60 m³ Fully mixed reactor 60 m³ Secondary fermenter 60 m³ |
At an experimental farm in Bad Hersfeld (Hesse), an innovative process was implemented as part of the ReBi research project – Flexible Biogas Production. The system begins with a hydrolysis stage followed by solid–liquid separation. The liquid phase is digested in a fixed-bed reactor, while the separated solids are further processed in a completely mixed reactor. This project is based on a technology co-developed by the founder of FlexBio (FNR funding codes 22400114 & 22401815).
The core concept is the multi-stage separation of the digestion process:
- Hydrolysis with solid–liquid separation
- Digestion of the liquid phase in a fixed-bed reactor
- Further treatment of solids in a completely mixed reactor
This process allows biogas plants to operate with greater flexibility, balance fluctuations in energy demand, and significantly improve overall efficiency. The technology was developed and successfully tested by the founder of FlexBio, who implemented it at the experimental site in Bad Hersfeld.
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