Solutions › Wirbelfixx gas mixer
Gas mixer · Wirbelfixx
As a biogas plant operator, you have probably tried any number of agitators over the years — maybe even a gas mixer. Our experience with them was mixed: the mixing works, but a huge volume of digestate is moved, and that costs electricity. We only wanted to move the gas. That’s exactly what the Wirbelfixx does. And because CO₂ dissolves in the substrate in the process, your biogas has a higher methane content and less CO₂ — ideal for biomethane plants.
Our principle
We have further developed the principle of the airlift pump and adapted it to the conditions in the digester. We push the biogas into the tank, the digestate is drawn in by itself — and the resulting mixture stirs the digester. Mixing works without having to circulate tonnes of substrate.
Your technical benefits
Everything else follows from one single difference: only the biogas is moved directly.
Instead of circulating tonnes of substrate, the Wirbelfixx only moves the light biogas. That’s the difference on your electricity bill.
No agitator shaft constantly working its way through the substrate. Fewer moving parts in the tank means significantly less to maintain.
What doesn’t rotate in the substrate can’t wear out either. No mechanical wear from moving agitators in the digester.
Your biological & economic benefits
Because the biogas is led through the substrate, part of the CO₂ dissolves in the digestate. The methane content of the biogas rises — and with it the electrical efficiency of the CHP unit. You need less feedstock for the same amount of electricity.
One percent more efficiency means 2.5% less feedstock. With 20,000 t of feedstock, that is 500 t a year that don’t have to be harvested — and digestate that doesn’t have to be spread.
And if you upgrade to biomethane, you have to separate less CO₂: that saves energy and reduces wear on the upgrading unit.
↑ CH₄
higher methane content because CO₂ dissolves in the substrate
−2,5 %
less feedstock per +1% electrical efficiency
500 t
less feedstock per year at 20,000 t — plus less digestate
− CO₂
lower costs for biomethane upgrading
More from your plant or your biogas upgrading
The Wirbelfixx is one of the building blocks to get there. We look at the biology of your plant as a whole — from the feedstocks through pre-treatment to the mixing technology. More methane in the raw gas means higher efficiency and less effort for upgrading.
Honest pre-selection
We say openly what the Wirbelfixx is the right answer for — and what it isn’t. That saves you time.
you run a biogas plant and want to reduce the power consumption of your mixing technology.
maintenance and wear of your current agitators bother you.
you want more methane in your biogas and better CHP efficiency.
you upgrade to biomethane and want to save on CO₂ separation.
your existing mixing technology runs economically and you don’t want to change anything.
you are only looking for the cheapest solution and don’t care about electricity, maintenance and yield costs over the lifetime.
you only want to hear that everything is possible. We tell you honestly where a gas mixer fits and where it doesn’t.
Next step
Then let’s talk. Tell us about your plant — we’ll estimate what the Wirbelfixx can save you in electricity and maintenance and gain in yield.
Or directly: +49 8734 939770 · s.stehlig@snow-leopard-projects.com
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