28 Jul '15, 2pm
New Bubble Greenhouses use bubbles to create freshwater in arid regions
The bubble greenhouse uses existing desalination technology , where the ability to produce freshwater from saltwater is possible through evaporation and condensation. The greenhouse also produces a cooler, wetter environment in which plants can flourish. The new approach places the evaporation and condensation processes outside the greenhouse. Inside the greenhouse, two water-filled ‘bubble columns’, stream thousands of tiny bubbles creating a large surface for water to evaporate or condense. Seawater has an inability to let small bubbles join together to form big bubbles, so a large surface area is maintained.