Physical Absorption UpgradeCO₂ Water Scrubbing Technology
Physical absorption desulfurization and carbon dioxide wash technology using pressurized counter-current water flows.
Biogas Purification by CO₂ Water Scrubbing
Water Scrubbing Technology is one of the most reliable and widely used methods for biogas purification and Bio-CNG production. The process is designed to remove carbon dioxide (CO₂), hydrogen sulfide (H₂S), moisture, and other impurities from raw biogas, resulting in high-purity methane gas suitable for Bio-CNG applications, industrial use, and vehicle fuel.
The system operates on the principle of physical absorption, where CO₂ present in biogas gets dissolved into water under pressurized conditions. Since carbon dioxide is highly soluble in water compared to methane (CH₄), effective separation can be achieved through a specially designed absorption process.
Why Biogas Purification is Important
Raw biogas contains several impurities that reduce its heating capability and damage downstream infrastructure:
Purification Benefits
How the Water Scrubber Operates
Pressurized water and biogas flow in opposite directions in a counter-current arrangement inside an absorption column:
Main Components Checklist
Key Features & Performance Parameters
Operational parameters and features of physical water scrubbing technology.
High Methane Purity
Delivers purified gas meeting commercial standards.
Low Methane Loss
Flash recovery loops re-inject dissolved gas back to start.
Chemical-Free Upgrades
No expensive organic solvents or reactants required.
Water Recycling Loop
Degassing tower strips CO₂, enabling infinite reuse.
| Parameter | Typical Range |
|---|---|
| Methane Purity | 95% - 99% |
| CO₂ Removal Efficiency | Up to 99% |
| Operating Pressure | 6 – 10 Bar |
| Water Circulation | Continuous Closed-Loop |
| Methane Recovery Efficiency | High (via Flash Tank) |
| Plant Automation | Fully / Semi-Automatic PLC-SCADA |
Advantages of Water Scrubbing Purification
Features and operational benefits of selecting physical counter-current water wash systems.
| Feature | Benefit |
|---|---|
| High Gas Purity | Delivers fuel standard Bio-CNG for logistics and vehicle grids. |
| Water Recycling | Drastically reduces daily utility water costs and consumption. |
| Methane Recovery | Reclaims dissolved methane to minimize feedstock conversion loss. |
| No Chemical Usage | Eco-friendly, chemical-free operation without toxic waste outputs. |
| Low Maintenance | Highly simplified tower hydraulics reduce overall plant downtime. |
| Continuous Purification | Enables stable, 24/7 industrial scale gas processing. |
Where Water Scrubbers are Deployed
Standard upgrade configurations across diverse commercial sectors.