Plug-flow digesters equipped with continuous plug-flow agitator systems are a genuine energy-saving alternative to stirrer tank digesters when it comes to the processing of difficult substrates with a high total solids (TS) content, such as e.g. grass silage or manure.
The maximum power input of the stirrer under full load is approx. 8.0 kW. The stirrer shaft is a split design and driven by two gear motors. The speed of both motors may be varied independently by way of frequency-control. The stirrer arms do not generate any feed motion, which helps to keep the load on the shaft low. This in turn ensures a long service life for the stirrer shaft.
The already digested fermentation substrate is further decomposed in the downstream post-digester as usual. The biogas created in the plant is temporarily stored in an uncomplicated and space-saving way under a stormproof inflatable film cover.
Desired performance:
- 250 to more than 500 kWel
This specific plant combines the following advantages:
- also for difficult substrates
- no problems with high grassland, grass silage or manure shares
- possible for high TS contents
- very low energy consumption
- high decomposition rate
Technical equipment:
- Plug-flow digester
- Split, horizontal plug-flow agitator system
- Fully insulated digester incl. ceiling
- Stormproof inflatable film cover of post-digester
- Large gas storage capacity
- Container CHP on request
- Top-grade solids feed designed either as blender or pusher plate