The methane produced by cows in its feces is widely used in farms elsewhere as a power source, as I understand it.
But no country is as invested as Norway in going away from carbon-based fuels, despite it having oil reserves and producing revenues to fund its conversion to non-carbon energy, such as hydro power sources and wind power and solar power. And it maybe the only country that does not have to rely on carbon-based (nor nuclear) fuel to generate electricity to power its high usage of electric vehicles.
I would not be surprised if there are government incentives behind Bovaer's decision to use 3-NOP. As this aligns with the zero-carbon goals of the world shitinatti.