In addition to the production of biomethane the Bright Biomethane systems may be used to recover and liquefy CO2 to create an extra source of revenue for the plant owner.
In addition to the production of biomethane the Bright Biomethane systems may be used to recover and liquefy CO2 to create an extra source of revenue for the plant owner. On top of this zero methane slip is achieved since the small amount of methane still present in the CO2 in recovered during liquefaction. When no liquid CO2 production is required the recovery system can be put in a stand-by mode that requires no additional energy.
By extending the Bright Biomethane system with a CO2 recovery module the gaseous CO2 that is produced during the upgrading can be liquefied. This liquid CO2 has food grade quality and can be used in:
The CO2 is compressed in a non lubricated two stage process compressor and passed through an automatic molecular sieve dryer to completely remove the moisture.
Then the CO2 goes to the fine filter to remove any remaining odorant compounds/impurities as well as any remaining powders.
The purified gas is sent to the CO2 liquefier; traces of non condensable gases still contained in the CO2 gas remain gaseous while the CO2 condenses in the liquefier.
Any entrained non-condensables such as oxygen, methane and nitrogen are effectively removed in the stripping tower.
These non-condensable gases are used for regeneration of dryer; the pure liquid CO2 flows to an insulated storage tank.
For more information, visit Bright Biomethane’s website.