niche
Gas fermentation
Autotrophic microbes (acetogens, hydrogen-oxidizers) ferment CO/CO2-rich syngas into ethanol, protein and chemicals.
Where it's used
Gas fermentation of food protein
Microbial food protein grown by feeding hydrogen-oxidising bacteria a mix of hydrogen, CO2 and oxygen in gas-loop bioreactors — a land-free 'food from air' route now at commercial demonstration scale.
Industrial single-cell protein for feed
Microbial single-cell protein grown by fermenting methane, CO2/hydrogen or side-streams into a high-protein feed ingredient that displaces fishmeal and deforestation-linked soymeal.