Gas fermentation: carbon from CO₂, energy from hydrogen
Hydrogen-oxidizing chemolithoautotrophs fixing carbon dioxide into single-cell protein, with no organic feedstock at all.
The actual dark-mode canvas: a hydrogen/oxygen/carbon-dioxide gas feed and a liquid medium contacted in a fermenter where chemolithoautotrophs fix CO₂ into biomass, leaving an off-gas and a protein-rich broth.
Carbon from CO₂, energy from hydrogen
These organisms need no sugar and no organic feedstock — they take carbon from CO₂ and energy from hydrogen, which is what makes the route interesting when the hydrogen is renewable. The stoichiometry closes both the gas-side and liquid-side balances at once, so the hydrogen demand per tonne of protein is a solved number rather than a claim.
Unit ops shipped for this vertical
Chemolithoautotrophic growth on H2/O2/CO2, closing both the gas and liquid balances.
Stream gas-feed composition, off-gas analysers and broth density from the fermenter's OPC-UA server into this flowsheet's twin comparison — gas-to-liquid mass transfer is the limiting step here, and a drift from the solved uptake is the first sign of it.
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- ✓Chemolithoautotrophic growth on H₂, O₂ and CO₂
- ✓Gas-side and liquid-side balances closed together
- ✓Patent benchmark JP2024028821A