WATER ABSORPTION Based Enrichment
Water absorption based biogas enrichment technology is a simple and cost-effective method for upgrading biogas to a higher methane content. The technology uses the fact that carbon dioxide (CO2) has a much higher solubility in water than methane. When biogas is passed through a tower filled with water, the CO2 dissolves in the water, while the methane passes through the tower and is collected at the top.
The water absorption process is also effective at removing hydrogen sulfide (H2S) from biogas. H2S is a corrosive gas that can damage equipment and pose a health hazard. When H2S dissolves in water, it forms a weak acid that can be easily removed by aeration or by adding a chemical sorbent.
Water absorption based biogas enrichment technology is optimal for small to medium-sized biogas plants. The technology is relatively simple to operate and maintain, and it does not require the use of any special chemicals. This makes it a good option for rural areas where access to specialized equipment or chemicals may be limited.
Advantages of Water Absorption Based Biogas Enrichment Technology
- Simple and cost-effective
- Effective at removing CO2 and H2S
- Optimal for small to medium-sized biogas plants
- Rural friendly – no special chemicals required
- Low operating cost
- Easy to operate
These are just a few of the potential uses for CO2 captured from biogas plants. As the technology for capturing and using CO2 continues to develop, we can expect to see even more innovative and beneficial applications for this versatile gas.