Gas 2 Feed microbial protein for aquaculture

Published 26 October 2022; updated 21 September 2026; 3-minute read. Gas 2 Feed was developing a fermentation process that uses microorganisms to convert captured CO₂ into single-cell protein for salmon feed. Electrolysis splits water into hydrogen and oxygen; combined with CO₂ in a reactor, microorganisms make protein with an amino-acid profile the company says is similar to fishmeal. The current feedstock is described as biogenic CO₂ from closed fish farms; future plans included capturing CO₂ directly from air.

The article frames the product as a way to replace some soy concentrate and fishmeal, whose production/transport contribute to aquaculture’s footprint. Company claims versus soy-based protein include 40% lower salmon-farming carbon footprint, 30% more carbon recycling, 2,000 times less water and 65,000 times less land use. These are stated comparisons from the article, not independently verified.

At publication, fermentation metrics and protein quality were being optimised at pilot scale; the page says the technology remained under development. Gas 2 Feed worked with sister company EcoFishCircle, whose RAS system could supply biogenic CO₂, and planned the Lista demonstration project. The page notes the underlying approach builds on NASA technology developed in the 1960s. Availability: under development. Category: aquaculture and fisheries. Linked UN SDGs: 2, 9 and 12. Public contact: Jarle Dragvik, Board member; no email shown. Company: GAS 2 FEED AS, Richard Johnsens gate 4, 4021 Stavanger, Norway; g2f.no. No event listings or participation fees are displayed.

Public-page recheck on 8 October 2026: no phone-number reveal control appeared in the loaded contact card.