What’s the difficulty with just allowing the algae to grom passively? Sure, piping in CO2 speeds up growth, but in a non-cost effective situation, algae will grow on it’s own with the CO2 just floating around in regular air.
Carbon neutral is carbon neutral. Not that I buy into the whole enviro-lie that carbon is a bad thing, but it will give the doomsayers one less thing to complain about.
Piping in CO2 is moronic and designed to make the algae to oil scheme sound sexier. A bigger deal. Like it’s a carbon sequestration scheme. Hey, burn coal nearby to make electric and pipe in the CO2 to these racks with algae bags on them. That kind of nonsense
There is nothing wrong with doing it that way. Just as there is nothing wrong with letting crops grow without fertilizer. In both cases though it helps to add a little to increase yield.