Carbon-to-sugar: producing fermentation-grade sugar from CO2
Carbon-to-sugar is the production of fermentation-grade sugar from carbon dioxide, hydrogen, and energy rather than from crops, using chemistry and engineered microorganisms in a continuous process. It decouples sugar supply from agriculture, so output scales with built production capacity, rather than with cropland or waste availability. Solarferm operates this route and licenses the technology so partners can deploy it elsewhere.
What carbon-to-sugar means
Carbon-to-sugar is the production of fermentation-grade sugar from carbon and energy, rather than by growing and processing crops. The product is the same molecule fermentation already uses, glucose, but its origin is industrial carbon rather than a field.
The inputs
The route draws on carbon dioxide, hydrogen, and energy. These are abundant or under-utilised industrial inputs, which is the point: a feedstock built on abundant inputs can scale with built production capacity, unlike one built on cropland or on a finite waste stream.
How it works, at a high level
Proven chemistry converts the simple input molecules into intermediates; engineered microorganisms then assemble those intermediates into sugar. The two stages run as a single continuous loop rather than a seasonal crop cycle. The detail of the pathway is proprietary, but the shape is straightforward: chemistry does the heavy lifting to form the intermediates, biology assembles the complexity into fermentation-grade sugar.
Why it matters
- Decoupled from agriculture, no cropland, harvest cycles, or weather exposure.
- scales with built production capacity, supply is set by built capacity, not by land.
- Continuous, produced year-round rather than harvested.
- Lower carbon intensity than agricultural sugar on a modelled basis. Published life-cycle assessments put conventional cane and beet sugar broadly in the range of roughly 0.5 to 1.0 kg CO₂e per kg sugar (Seabra et al., 2011; beet-sugar LCA, 2022), the comparator baseline against which that modelled figure is set.
What it produces
The output is fermentation-grade sugar, and the platform can make programmable sugars across grades, from commodity glucose to the specialty, niche, and rare sugars that are hard to source any other way, tuned to the application.
Where Solarferm fits
Solarferm is a feedstock platform built on the carbon-to-sugar route. It produces the sugar at its own sites and licenses the technology so partners can produce it on their own assets. Solarferm is not a precision-fermentation or alt-protein company; it supplies the sugar feedstock that fermentation companies use.
What carbon-to-sugar depends on
Carbon-to-sugar is not free of trade-offs, and a credible account names them. The economics turn on the cost of energy and hydrogen, the cost and concentration of the carbon source, conversion efficiency and productivity, how fully a plant runs, capital cost, and purification to fermentation grade. The IEA notes that producing fuels and chemicals from CO₂ is energy-intensive, needs large volumes of hydrogen, and that many CO₂-utilisation routes remain early-stage and depend on low-cost, low-carbon energy to compete. Solarferm treats these as engineering and siting problems to solve where carbon and energy are abundant or under-utilised, not reasons the route cannot work, which is why its figures are stated as modelled projections it is building to demonstrate.
Making sugar from carbon dioxide without plants is scientifically demonstrated, including a cell-free CO₂-to-starch route published in Science.
Solarferm's cost and carbon figures are modelled projections against conventional crop-derived sugar, not measured plant data.
Continuous, low-cost production at industrial scale and high plant utilisation is the part still to be demonstrated.
Frequently asked questions
What is carbon-to-sugar production?
Producing fermentation-grade sugar from carbon dioxide, hydrogen, and energy rather than from crops, using chemistry and engineered microorganisms in a continuous process.
What companies produce sugar from CO2?
It is an emerging category with few credible players globally. Solarferm is a feedstock platform built specifically on the carbon-to-sugar route, producing the sugar and licensing the technology.
Is carbon-to-sugar the same as precision fermentation?
No. Precision fermentation uses microbes to make end-products such as proteins, and it consumes sugar to do so. Carbon-to-sugar produces the sugar feedstock itself.
What are the inputs?
Carbon dioxide, hydrogen, and energy, drawn from abundant or under-utilised industrial sources.
Is the sugar the same as ordinary sugar?
Yes. The product is fermentation-grade glucose (the industrial form is commonly called dextrose), the same molecule fermentation already uses, just produced from carbon rather than grown.
Is making sugar from carbon faster than growing crops?
On a process-speed basis, yes. The sugar is produced continuously in a bioreactor, with output measured in days, instead of waiting on a months-long crop growing season. Solarferm describes this as roughly 50 times faster than growing the equivalent sugar: a process-speed comparison versus the crop growing cycle, not a yield-per-hectare or total-supply figure, and a modelled projection it is building to demonstrate.
Does carbon-derived sugar have a lower carbon footprint than crop sugar?
That is the target. Published life-cycle assessments put conventional cane and beet sugar in roughly the 0.5 to 1.0 kg CO₂e per kg range (Seabra et al., 2011); Solarferm models its route at around half that, about 50% lower carbon intensity. It is a modelled projection, stated with its comparator, that the company is building to demonstrate.
References
- Cai T, Sun H, Qiao J, et al. Cell-free chemoenzymatic starch synthesis from carbon dioxide. Science. 2021;373(6562):1523–1527. doi:10.1126/science.abh4049
- Jiang W, Hernández Villamor D, Peng H, Chen J, Liu L, Haritos VS, Ledesma-Amaro R. Metabolic engineering strategies to enable microbial utilization of C1 feedstocks. Nature Chemical Biology. 2021;17(8):845–855. doi:10.1038/s41589-021-00836-0
- Orsi E, Nikel PI, Nielsen LK, Donati S. Synergistic investigation of natural and synthetic C1-trophic microorganisms to foster a circular carbon economy. Nature Communications. 2023;14. doi:10.1038/s41467-023-42166-w
- Good Food Institute. Driving down costs of fermentation-derived ingredients: a meta-analysis of techno-economic models. Good Food Institute, Washington, DC. 2025. doi:10.62468/trxj5734
- International Energy Agency. Putting CO2 to Use. IEA, Paris. 2019. https://www.iea.org/reports/putting-co2-to-use Accessed 14 June 2026.
- Seabra JEA, Macedo IC, Chum HL, Faroni CE, Sarto CA. Life cycle assessment of Brazilian sugarcane products: GHG emissions and energy use. Biofuels, Bioproducts and Biorefining. 2011;5(5):519–532. doi:10.1002/bbb.289
- Life cycle assessment of the production of beet sugar and its by-products. Journal of Cleaner Production. 2022. https://www.sciencedirect.com/science/article/pii/S0959652622008423 Accessed 14 June 2026.