Pentair goes one step further by recovering CO₂ gas after the membrane separation unit. This system produces CO₂ and sends impurities – including the CH₄ – back to the membrane system.

This helps to reduce the portion of environmentally-harmful greenhouse gases released into the atmosphere.

Pentair recovers the CH₄ slip from the membrane unit and provides the possibility to produce a second product - green CO₂ - out of the natural biogas.

The system compresses, purifies, dehumidifies, and liquefies the CO₂. When the CO₂ gas is ejected to the atmosphere, the liquid CO₂ is re-used within the system to save energy. This results in a cost-efficient separation of CH₄ and CO₂. When the CO₂ is sold as liquid CO₂, an extra cooling unit and a liquid CO₂ storage tank is required.

The CO₂  installation can be used in the beverage industry, greenhouses and food freezing applications.