COt(w)oGO system
Membrane CO₂ removal that turns your biogas into biomethane
For any capacity, COt(w)oGO is the CO₂ removal stage of your custom-built upgrading solution. Delivered as a pre-engineered, factory-tested membrane package, it separates CO₂ from methane and delivers biomethane ready for the grid, Bio-CNG or Bio-LNG. Still have H₂S in your gas? Then we combine COt(w)oGO with H₂S removal: SULAGO® up to 1,500 Nm³/h or SULAWAY® above it. Together they form SULAGO+ or SULAWAY+.
Every percent of methane you lose is revenue you never see
Membranes are a proven way to separate CO₂ from biogas. We didn't invent them, and we don't pretend to. What decides your return is everything around them: how well the gas is prepared, how the stages are arranged and what happens to gas that doesn't meet spec the first time.
In a COt(w)oGO system, surplus gas from the membrane stages goes back to the compressor inlet. Off-spec gas gets a second pass instead of being lost. The result: methane slip below 0.5%, and more of your gas sold as biomethane.
How it works
Radical results through simple, robust engineering
COt(w)oGO is built on proven membrane technology from reputable suppliers. The number of stages and the compression are engineered to match your gas flow, composition and target specification.
The COt(w)oGO advantage, quantified
< 0.5% methane slip
Recycling between the stages keeps your methane in your product.
CO₂ down to 2,000 ppmV
Biomethane that meets demanding grid and fuel specifications.
5+ years membrane life
With scheduled filter changes, the membranes last at least five years.
No chemicals, no waste stream
Separation by membranes alone: nothing to buy in, nothing to dispose of.
Sized to your flow
From farm scale upward, with no upper capacity limit.
Plug-and-play delivery
Assembled and tested in our factory in Zierikzee. Operational within hours of arrival, not weeks.
The result: biomethane to sell, and CO₂ you can use
Your biomethane goes to the grid, a CNG station or a liquefaction plant. The separated CO₂ can be released, captured for reuse or storage, or liquefied on site with our add-on module COt(w)oGO(L).
As a liquid, far more CO₂ fits in every tank and every truck. Greenhouses use it to grow crops, beverage and food producers for carbonation and processing, and it can be stored in depleted gas fields. For food and beverage use, the CO₂ must be bacteria-free; we assess that per project.
Ask us about liquefactionIdeal Applications
Engineered for plants that want more from their gas
FAQ
Engineering out the uncertainty
Talk to an engineer
Let's engineer your advantage
Related Product
SULAGO® System
Need H₂S removal too? SULAGO+ does both, up to 1,500 Nm³/h.
Discover more
Related Product
SULAWAY® System
High H₂S and large volumes? SULAWAY+ does both, from 1,500 Nm³/h.
Discover more