Direct Injection into Biogas Plants
Direct and space-saving feeding of substrates into the fermenter
If substrates are to be fed directly from the mixer into the fermenter, direct-feed augers are the ideal solution. Direct-feed systems are frequently used in underground fermenters and ensure reliable, trouble-free operation. They enable compact, energy-efficient, and robust feeding—especially in confined spaces.
Consistent feeding from the mixer directly into the fermenter – Your benefits
Compact Installation
Space-saving conveyance without additional system components
Continuous Material Flow
Consistent feeding for stable fermenter loading
Clog-free operation
Even with fibrous or heterogeneous substrates
High operational reliability
Fewer malfunctions and stable system operation on a day-to-day basis
Robust design
Durable technology for continuous use and abrasive materials
Having trouble with direct feeding or material flow? We're here to help.
System Overview and Features of Our Direct Entry Service
PRÄZI Direct Entry
| Conveying capacity per hour | 30 m³ / h |
| Motor Power of Single-Unit Systems | 5.5 kW |
| Manufacturer of the drives | Gearbox construction north |
| Outer diameter of the pipes | 457 mm |
| Material quality | Stainless steel (V2A), extremely robust |
| Compatibility | Suitable for in-ground fermenters |
| Operating efficiency | • High throughput with low energy consumption • Suitable for a variety of substrates, including more demanding ones • Minimized risk of clogging during operation • High availability thanks to rapid spare parts supply |
Have your direct listing optimized
We can help you design the optimal feed system—tailored to your substrate, throughput, and existing equipment.
Your Consultant for Direct Entry Systems
FAQ
Frequently Asked Questions About Direct Injection into Biogas Plants.
What are the advantages of a direct-feed auger in a biogas plant?
Direct-feed augers enable particularly compact and efficient feeding of the fermenter, as the substrate is fed directly without additional transfer stations.
The key advantages:
– minimal space requirements for the feeding system
– reduced mechanical wear
– lower internal power consumption
– simplified plant structure
For which substrates is a direct-injection system suitable?
Direct-injection systems are optimally designed for corn silage in standard operation, but can also operate reliably with more challenging substrates.
Suitable substrates include, among others:
– corn silage
– solid manure
– grass
– whole-plant silage (GPS)
Thanks to their robust construction and powerful drives, even high-fiber materials can be conveyed reliably. The technology is designed exclusively for solid feed—pure liquid systems (e.g., liquid manure) are not within its scope of application.
Is direct injection suitable for my biogas plant?
To install a direct injection system, a fermenter is required that is either fully or partially buried in the ground. This requires a low water table.