Substrate/Feed Supply Systems
Why did we develop substrate/feed supply systems?
The idea of a fully automatic substrate supply system was implemented in the very first biogas system which we constructed. In this way, the daily labour requirement, any annoyance caused by odours as well as the energy required, can all be reduced considerably.
With each succeeding substrate supply system, we eliminated more and more minor issues. In later variations of the substrate supply system, the volume of the hopper was increased and the controls further optimized through weighing systems and visual inspection capabilities.
Today, our customers demand substrate supply systems which operate entirely automatically, are highly dependable and consume the least energy possible to operate. For this reason, we offer a substrate supply system with a wide variety of options and solutions which are geared to your specific biogas processing requirements.
Principles of Substrate Supply Technology
Modular Construction Method
By approaching the construction of substrate supply systems on a modular basis, PPAD can offer many different combinations.
Depending on the specific digester/fermenter and the organic feed material, we can now offer the optimal technical solution. Note that with all of our systems, we emphasize and feature an absolutely liquid tight construction, that is, while the substrate is being supplied to the digester, no oxygen can ever enter.
In some cases, we supply component parts for substrate supply systems only, such as the hydraulic piston feed. We then view our biogas installation as a functional, proven, complete assembly. As standard equipment, we supply and install specific controls with each installation.
In the following photos, you will see many different substrate combination possibilities. First you will see simple feed systems which can then be combined with different design approaches which you will see next.
1. NawaRotor – Auger
Auger for renewable matter especially corn silage supply. Allows supply up to 2m below the full level of the digester. The NawaRotor is notable for the minimal energy requirements.
2. Multirotor – Auger
Supply of substrate is possible up to 6 m below the full level.
3. Solid Matter Push Pistons
Supply here is possible up to 18 m below the full level
1. Feed Bins – Basic
In the sizes of 4, 6, 9, 14.5 and 19,5 m³
2. Feed Bins – Maxi
In the sizes of 40, 60 and 80m³
3. Feed Bins – Mix
In the sizes of 12, 15, 24, 30, 36, 45 and 50m³ 
Solid Matter Supply Systems In Operation
Top entry/feed with a design volume of 4 m3 and hydraulic auger feed technology.
Bottom supply systems with a capacity of 60 m³ for supply of corn silage and other renewable, agricultural matter.
The inside of the 40 m3 walking floor container.
Filling a top fed substrate system which is raised on posts.
View of a vertical mixer seen from the inside.
References
biogas facilities outside of Germany
NL Nijverdal
biogas facility Nijverdal (NL) I
2x PPAD Feeding-Systems
Start-up 08/2001
Niederlande/Eijbergen
biogas facility Eibergen NL
3 digester 825m³
second digester 3.070m³
Start-up 03/2005
Japan/ Hokaido/ Obihiro
biogas facility Obihiro I
liquid manure storage 2.000m³
2 Gassäcke á 40m³
CHP/ ICE 40 kW el.
Start-up 12/2004
only construction planning
