For the island of Singapore, where real estate is at a premium and the land rates are exceptionally high, the only viable option is to go vertical to make the island more self-sufficient in food.
In making this goal of a food self-reliant Singapore a reality, Entrepreneur Jack Ng, with the help of Agri-Food and Veterinary Authority (AVA), has come up with one of the world’s first commercial vertical farms. This soil based vertical farm produces one ton of vegetables every other day and is five to ten times more productive than a regular farm.
The rotation system does not need an electrical generator. It is powered by a unique gravity aided water-pulley system that uses only one litre of water, which is collected in a rainwater fed overhead reservoir. This method also boasts a very low carbon footprint as the energy needed to power one A-frame is the equivalent of illuminating just one 60-watt light bulb. The water powering the frames is recycled and filtered before returning to the plants. All organic waste on the farm is composted and reused.
It’s still up for debate whether vertical farms are more efficient at producing food than traditional greenhouses. As Gene Giacomelli, a plant scientist at the University of Arizona points out, “The limiting factor is light.
Check out this video report on the technology: http://www.youtube.com/embed/2nFQOkzEjxQ"
Via Charles van der Haegen