Woah, very neat setup. That looks more like a vertical NFT setup than aeroponics though. Is there a fine nutrient mist that I can't see? or is it simply pumped to the top then drips down the edge?
Yes, the structures are vertical NFTs. The method is borrowed from aeroponics. In our lab test, we wanted to source things locally, reduce CAPEX/OPEX to the lowest we can and have the best ROI possible. We realized that instead of spending additional motor horsepower and thus more electricity, we can reduce it by pumping up once and then dripping them from the top. The mist/spray method also clogs quite often and is more cumbersome to clean. Our next step with both Flats and "A" systems will use something similar -- perhaps a "flood and drip". We have also realized the benefit of the "Dutch Bucket" system for growing more common food/plants.