Technology
Process, system sizes and production quantities
The process
1
Pretreatment:
Cleaning the gas
In the pretreatment stage, the raw biogas is cooled and cleaned of pollutants such as H2S and VOCs with the help of activated carbon beds.
2
Biogas upgrading:
Separation of methane and CO₂
Based on the membrane process, CO₂ diffuses through the surface of the membrane faster than CH₄ under pressure. In the 3-stage process, it is possible to recover >99% of the CH₄.
3
Fine cleaning and liquefaction
From biomethane
Fine purification makes it possible to achieve the biomethane specifications necessary for liquefaction. A molecular sieve adsorbs residual H2O and CO₂ before the biomethane is compressed to 100 bar and expanded and cooled down in several stages through Joule-Thomson valves.
4
Liquefaction
of carbon dioxide from the waste gas stream of the biogas upgrading process
The CO₂-containing waste gas stream from biogas upgrading can be cleaned, dried and liquefied in a further process step.
5
Storage:
Tank loading system
In a double-walled vacuum-insulated tank, the approx. -150°C cold Bio-LNG is temporarily stored until calibrated loading.
Structure of our liquefaction plant
Plant sizes and production quantities
The “Green Line Liquid” solution can be modularly extended to any biogas production volumes. We are thus creating a standard solution to ensure the supply of spare parts and therefore can provide a safe operation.
Plant size
|
Biogas production
|
Biomethane production
|
Bio LNG production
|
Bio CO2 production
|
|---|---|---|---|---|
| 550 | 290 | 160 | 2,5 | 5,0 |
| 700 | 335 | 190 | 3,0 | 6,0 |
| 1.000 | 500 | 275 | 4,5 | 9,0 |
| 1.400 | 675 | 365 | 6,0 | 12,0 |
| 1.700 | 840 | 455 | 7,5 | 15,0 |
| 2.000 | 1.000 | 545 | 9,0 | 18,0 |
| 2.700 | 1.335 | 725 | 12,0 | 24,0 |
| 3.400 | 1.675 | 965 | 15,0 | 30,0 |
| 4.000 | 2.000 | 1.050 | 18,0 | 36,0 |
*We can supply equipment for any production quantity.
**Biogas stream at a methane content of 55.5%.
Time-lapse footage of the construction of the Bio-LNG plants
Construction of Germany’s first bio-LNG plant in Darchau
Time-lapse recording of the construction of our energy-efficient, modular and decentralized technology for the processing and liquefaction of biomethane and carbon dioxide
Source: Perspektive Media
Construction of Brandenburg’s first bio-LNG plant in Parmen
Time-lapse recording of the construction of our energy-efficient, modular and decentralized technology for the processing and liquefaction of biomethane and carbon dioxide
Source: Perspektive Media GmbH
Customer testimonials
“The consulting, planning and implementation with RUHE Biogas was super, and after a short time we could already see the positive effects in the entire biogas process.”
“Especially when it comes to marketing the bio-LNG, RUHE Biogas’ expertise and transparency has helped me a lot to realize the true value of my biogas.”
“Kunibert Ruhe already sold us a biogas plant back then, and we are still very satisfied today. Now we are starting bio-LNG production with RUHE Biogas – for us there is no better partner.”
