Hacker News Reader

Or you can grow spirulina or other microalgae which is much more efficient at converting CO2, and at absorbing the available sunlight. I believe you need about 5 m2 of southern facing window in a bioreactor that is 6 inches deep to convert the 1 kg of CO2 that a person creates. Can't find the citation sadly.

View on HN

I'm casually experimenting with this too, to improve AQ in my home office. Do you recall the surface area in the 6-inch-deep bioreactor (or total volume)? The only hard numbers I've found are from the Russian BIOS-1,2,3 experiments, which suggest 18L/person of Chlorella will 75-100% compensate for a person's CO2.

I have 18L of Spirulina, which appears to be having some effect, though not anywhere near a complete offset. Though, my setup is quite sub-optimal, and I've seen articles that suggest Chlorella is a couple times more efficient at biofixation than Spirulina. Continuing to tinker :)

Reply on news.ycombinator.com