I had this idea of agrivoltaic azolla cultivation, combining solar farm with carbon sequestration
I'm not sure this would actually work? Is there anything wrong with it? I think it would only work somewhere that doesn't experience cold winters. The idea that it uses things that are already highly available in a very efficient synergistic combination.
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On a surface look, probably it works. Maybe things like nitrate/phosphate balance or pest/microbe control impact the long term production.
The problem, as with all CCS strategies is: how do you pay for it? Maybe you can sell those products for a rate that covers the labour and wear and upkeep of the system? It might just be more cost effective to take the carbon-free energy and use it to displace fossil fuel consumption...
Excess energy sale, biochar, animal feed, fertilizer sales. Along with carbon capture credits if somewhere that pays for that.
Oh I also forgot, technically you could probably raise fish in the pond as well, but I don't know if they'd eat all the azolla. The point also is to keep the pond shallow, less than 10 cm, to make it easier to construct, harvest, and manage.
Master Plan: Agrivoltaic Azolla Cultivation (Simplified)
A practical, low-cost system that uses solar panels and floating water ferns (Azolla) to capture carbon and generate profitable products.
The 4-Step System Loop
1) Shallow Clay Ponds
2) Solar Panel Canopy (Agrivoltaics)
3) Automated Squeeze Loop
4) Solar Drying & Final Products
Estimated Yearly Yields (Per 1 Hectare Pilot)