See jarenmf's comment. Basically the CO2 is catalyzed into Methane using an 'inorganic catalyst', there is this paper[1] which uses a ruthenium catalyst at 400 degrees C to do it.
Then the methane is consumed by some genetically modified bacteria (probably e.coli) first to convert it to an intermediate product, and then with a second organism to convert it into starch.
In the article they talk about genetically modified enzymes and I've actually jumped ahead to the using genetically modified bacteria here[2]. I think that is a safe assumption as a number of bio-reactors do exactly this.
What is somewhat interesting to me is that livestock generates a lot of methane, if you could harvest it and convert it back into starch to feed the livestock you could increase the efficiency of raising livestock farming.
Then the methane is consumed by some genetically modified bacteria (probably e.coli) first to convert it to an intermediate product, and then with a second organism to convert it into starch.
In the article they talk about genetically modified enzymes and I've actually jumped ahead to the using genetically modified bacteria here[2]. I think that is a safe assumption as a number of bio-reactors do exactly this.
What is somewhat interesting to me is that livestock generates a lot of methane, if you could harvest it and convert it back into starch to feed the livestock you could increase the efficiency of raising livestock farming.
[1] https://phys.org/news/2020-02-method-carbon-dioxide-methane-...
[2] The article hasn't appeared in sci-hub yet :-)